Energy Levels of Light Nuclei A = 19

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1 9 Revised Manuscript October 08 Energy Levels of Light Nuclei A = 9 D.R. Tilley a,b, H.R. Weller a,c and C.M. Cheves a,c, R.M. Chasteler a,c a Triangle Universities Nuclear Laboratory, Durham, NC , USA b Department of Physics, North Carolina State University, Raleigh, NC 69-80, USA c Department of Physics, Duke University, Durham, NC 08-00, USA Abstract: An evaluation of A = 8 9 was published in Nuclear Physics A9 (99), p.. This version of A = 9 differs from the published version in that we have corrected some errors discovered after the article went to press. The introduction and introductory tables have been omitted from this manuscript. Reference key numbers are in the NNDC/TUNL format. (References closed October, 994) This work is supported by the US Department of Energy, Office of High Energy and Nuclear Physics, under: Contract No. DEFG0-88-ER4044 (North Carolina State University); Contract No. DEFG0-9-ER4069 (Duke University).

2 Nucl. Phys. A9 (99) A = 9 Table of Contents for A = 9 Below is a list of links for items found within the PDF document. The introductory Table is available on this website via the link. A. Nuclides: 9 He, 9 Li, 9 Be, 9 B, 9 C, 9 N, 9 O, 9 F, 9 Ne, 9 Na, 9 Mg B. General Tables: Table 9.: General table for 9 O Table 9.8: General table for 9 F Table 9.6: General table for 9 Ne C. Tables of Recommended Level Energies: Table 9.: Energy levels of 9 O Table 9.9: Energy levels of 9 F Table 9.: Energy levels of 9 Ne D. References E. Figures: 9 O, 9 F, 9 Ne, Isobar diagram F. Erratum to the Publication: PS or PDF

3 9 He, 9 Li, 9 Be (Not observed) See (98ANZQ). 9 B (Not illustrated) 9 B has been observed in the bombardment of Be by MeV/A 6 Fe ions (984MU) and in the fragmentation of 44 MeV/A 40 Ar (988GUZT) and MeV/A 48 Ca (99MU9). See also (989DE). The mass excess adopted by (99AU0) is 9.60 ± MeV. Shell model predictions for low-lying levels are discussed in (99WA). See also (989POK, 990LO). 9 C (Fig. 4) 9 C has been observed in the 0.8 GeV proton bombardment of thorium (986VI09, 988WO09) and in the fragmentation of 66 MeV/A argon ions (98GI0) and in 44 MeV/A Ne on 8 Ta, and in MeV/A 0 Ne on C (994RAZW, 99OZ0). The mass excess adopted by (99AU0) is. ± 0. MeV. See also (986VI09, 98GI0, 988WO09, 99OR0). 9 C is then stable with respect to decay into 8 C n by 0.6 MeV and into C n by 4. MeV. The half-life was measured to be 0 ±0 ms (988DUZT) and 4. ±4.0 ms (994RAZW). The total reaction cross section for 9 C on Cu has been measured by (989SA0). See also (98DUZU) and the review of exotic light nuclei of (989DE). Hartree-Fock calculations by (98SA) predicted ground state properties and spectra of 9 C and other exotic light nuclei. A shell model study is presented in (99WA). Microscopic predictions of β-decay half lives are discussed in (990ST08). The relative yields of carbon isotopes produced in the fragmentation of 84 Kr are calculated in (98SN0). See also the study by (99LA) of the influence of separation energy on the radius of neutron rich nuclei. 9 N (Fig. 4) 9 N has been produced in a number of different multinucleon transfer reactions (98AJ0, 98AJ0), and these results lead to an adopted value (99AU0) of.860 ± 0.06 MeV for the mass excess. 9 N is then stable with respect to decay into 8 N n by. MeV. The half-life has been measured to be 0. ± 0.0 s (986DU0), s (988MU08), 0. ± 0.0 s

4 (988SA04), 0.00 ± s (988DUZT), 0.9 ± 0.09 s (99RE0). The neutron emission probability has been measured to be P n = 4 % (988MU08) and P n = 6.4 ±.6 % (99RE0). Excited states in 9 N observed in 8 O( 8 O, F) 9 N have been reported by (989CA) at E x =. ± 0.0,.6 ± 0.0,.4 ± 0.0,.4 ± 0.0, and 4.8 ± 0.0 MeV. See also (98AJ0, 988DUZT, 99OZ0). A discussion of self-consistent calculations for light neutron-rich nuclei is presented in (990LO). Extensive shell model calculations for observables in exotic light nuclei are discussed in (99PO). See also the shell model calculations and discussions in (99WA). GENERAL: See Table O (Figs. and 4). 9 O(β ) 9 F Q m = 4.89 The weighted mean of several half-lives is 6.96 ± 0.0 s: see (9AJ0, 98AJ0). The decay is complex: see reaction 4 of 9 F and Tables 9. and Be( 8 O, 8 Be) 9 O Q m =.9 See (98AJ0).. C( Li, p) 9 O Q m =.4 States of 9 O reported in this reaction are displayed in Table O(t, p) 9 O Q m =.0 Proton groups corresponding to 9 O states with E x.6 MeV and E γ measurements are displayed in Table 9... (a) 8 O(n, γ) 9 O Q m =.9 (b) 8 O(n, n ) 8 O E b =.9 4

5 Table 9.: 9 O General Reference Description Nuclear Models 98CHJ 988BR 988ET0 988WA 989CA 990SK04 99MA4 99JI04 99ZH 99PO Nucl. struc. calcs. using mixed-config. shell model: effective & surface δ-interactions Semi-empirical effective interactions for the s-0d shell Analysis of magnetic dipole transitions between sd-shell states of some A = 9 nucl. Shell model predictions of energy spectra and wave functions for 9 N(β ) 9 O Multinucleon transfer rxns. at MeV & shell model calc. of,9 N, 9, O levels A = 8 nuclei, effective interaction in the sd shell (also calc. A = 9 energy spectra) Finite nuclei calculations with realistic potential models Bonn potential used to evaluate energy spectra of some light sd-shell nuclei Theoretical calculation of neutron induced data of 9 F and uncertainties of parameters Shell-model calcs. of several properties of exotic light nuclei Special States 98CHJ Nucl. struc. calcs. using mixed-config. shell model: effective & surface δ-interactions 98LIF Double-δ & surface-δ interactions and spectra of oxygen isotopes in the sd shell 988WA Shell model predictions of energy spectra and wave functions for 9 N(β ) 9 O 989CA Multinucleon transfer rxns. at MeV & shell model calcs. of,9 N, 9, O levels 989SAH Second class currents & neutrino mass in mirror transitions (A = 9) 990SK04 A = 8 nuclei, effective interaction in the sd shell (also calc. A = 9 energy spectra) 99NA08 Charge-symmetry-breaking nucleon-nucleon interaction in the s0d-shell nuclei Complex Reactions Review: 988JOB Other Articles: 98BU0 Heavy ion radioactivity Projectile-like fragments from 0 Ne 9 Au counting simultaneously emitted neutrons

6 Table 9.: 9 O General cont. Reference Description Complex Reactions cont. 98MI 989BA9 989CA 989SA0 Measurement of total reaction cross sections of exotic neutron-rich nuclei Evaluation of hypernucleus production cross-sections in relativistic heavy-ion collisions Multinucleon transfer rxns. at MeV & shell model calc. of,9 N, 9, O levels Total cross sections of reactions induced by neutron-rich light nuclei The thermal capture cross section is 0.6 ± 0.0 mb (98MUZQ). The scattering length b =.84 ± 0.0 fm, σ free =.86 ± 0.0 b (99KO6). The total cross section has been measured for E n = 0.4 to.4 MeV [see (98AJ0)] and at E n = to. MeV [G. Auchampaugh, quoted in (986KO0)]. A multi-level R-matrix analysis of these and additional σ(θ) data leads to the states shown in Table 9.6 and to some additional structures. The five states [ 9 O*(6., 9.64, 9.84, 0., 0.66)] (see, however, footnote (a) to Table 9.6) contain about 0 0% of the allowed f / single-particle strength. See also the compilation of neutron cross sections in (988MCZT). Isobaric analog assignments are presented (986KO0). See also (98RAA) and see the astrophysical discussion in (988APA, 988MAU) O(n, α) C Q m =.009 E b =.9 The total cross sections for the α 0 and α groups have been measured for E n =. to 8.6 MeV: resonance structure is reported at E n =.0 ± 0.0 and 8.0 ± 0.0 MeV with Γ lab = 0. and 0. MeV, respectively [ 9 O*(.,.8)]: see (98AJ0).. 8 O(d, p) 9 O Q m =. Angular distributions have been measured at E d = 0.8 to MeV: see (98AJ0, 98AJ0). The l n values and spectroscopic factors derived from these measurements are displayed in Table 9.. Branching ratios are shown in Table O*(0.096) has g = 0.48 ± 0.06; its configuration appears to be mainly d /, and B(M) = ± 0.0 µ N. The E value for the transition is. ± 0. kev. Assuming E f = 96.0 ± 0. kev (Table 9.), E i = 4.4 ±0. kev. Angular correlations are consistent with J π = for the ground state and 6

7 Fig. : Energy levels of 9 O. For notation see Fig..

8 Table 9.: Energy Levels of 9 O a E x (MeV ± kev) J π b ; T τ or Γ c.m. Decay Reactions 0 ; [τ / = 6.9 ± 0.08 s] β,,, 4,,, 8, 9, ± 0..4 ± 0.4. ± ± 0.9 τ m =.00 ± 0.0 ns γ, 4,, 8, 9, 0 [g = 0.48 ± 0.06] τ m =. ± 0. ps γ, 4,, 8 τ m >. ps γ, 4, τ m = 9 ± 9 fs γ, 4,, ±.6 ( ) d τ m ps γ, 4,, 8. ±. (τ m ps) γ, 4,, 8.6 ±. (, ) d, 4,, ±.4 c γ, 4, 4.09 ±.9 Γ < kev, 4, 4.8 ±.4, Γ < kev, 4, 4.40 ±. Γ < kev, 4, 4.80 ± 4.6 Γ = ± kev n, 4,, 4.06 ±. Γ < kev, 4,, ±..000 ± 4. Γ < kev, 4,.080 ±.4 Γ = 49 ± kev n,.484 ±. Γ =.4 ±.0 kev n, 4,,.840 ±.8 ( 9 ).0 ±. c Γ < kev, 4,.4 Γ 490 kev n.046 ± 4. c Γ =.8 ±.4 kev n, 4,,, ±. c Γ 0 kev n, 6.96 ± ±.6 Γ = 9. ±.4 kev n, 4,,, ±. c ± 4.8 ( ) (n),, 6.8 ± 6 c, 6.90 ± 8, ± 9, 8

9 Table 9.: Energy Levels of 9 O a (continued) E x (MeV ± kev) J π ; T τ or Γ c.m. b Decay Reactions.8 ± 0,.4 ± 8,.08 ± ± 0 8. ± ± ± ± ± ± ± ± ± 0 9. ± ± n, n, n n. ± 0 Γ = 40 kev n, α 6.8 ± 0 Γ = 0 kev n, α 6 a See also Tables 9. and 9.. b See also reaction and Table 9. in (98AJ0). c See footnotes to Table 9.4. d (98AJ0) gave J π = for these levels. Assignments have been revised based on arguments presented in (988WA). 9

10 Table 9.: Radiative decays in 9 O a E i (MeV) J π i E f (MeV) Branch (%) a δ ± ± ± ± ± ± < δ <. 0 ± ± ± 4 a For other values and for references see Table 9. in (98AJ0). unambiguously fix J π = and, respectively, for 9 O*(0.096,.4): see (98AJ0) for references. See also (986SEB) O(α, He) 9 O Q m = 6.60 Differential cross sections were measured at E α = 6 MeV and analyzed with DWBA calculations (99YA08). See Table N(β ) 9 O Q m =.8 Many measurements of the half-life have been reported (see 9 N) and a value of 0.04±0.06 s has been adopted. A neutron emission probability of 4 % (988MU08) and 6.4 ±.6% (99RE0) has been measured. Shell model predictions for the 9 N(β ) 9 O decay are discussed in (988WA), and a β delayed γ decay scheme for 9 O based on measurements of (986DU0) (E γ = 96.0 ±.0, 09. ±0.8, and.8 ±.0 kev with relative intensities of 00 ±0, 6 ±, and 6 ± ) is proposed. Arguments for J π = ( ) and (, ) for the 06 and kev levels are given. Evidence on the formation and decay of the 94 kev complex of levels is reviewed. These calculations predict a 9 N half life of 0.4 s and a neutron emission probability P n = 0.8. They also predict J π = for the 9 N ground state and branching ratios for decay to 9 O levels. 0

11 Table 9.4: States in 9 O from C( Li, p) a E x (MeV ± kev) J b E x (MeV ± kev) J b ± 4.8 i ±. 6.8 ± 6.0 j.46 ± ± 8 9. ± ± 9.6 ±.9.8 ± ±.6.4 ± 8.6 ±.8.08 ± 0.6 ± ± ±.4 c 8. ± ± ± ±.4, 8.40 ± ±.,, 8.6 ± ± ± ±. d 8.96 ± ±., 8.9 ± ± 4., 9.0 ± ± ± ±. 9. ± ±.8,, e 9.4 ± 0.0 ±. f ± 4. g ±. h ± ± ±. h 9.98 a (9FO0); E( Li) = 6.0 MeV. Angular distributions have been reported to all states with E x < 6.8 MeV. See also (98AJ0). b Derived from total cross section and J analysis. c Corresponds to unresolved states. Assuming one of these to be a state (see Table 9.), the other should have J =. d May correspond to unresolved states. e If this group corresponds to a single state, the analysis indicates J π = 9, or (9FO0). f Narrow unresolved states: see discussion in (9FO0). g Cross section is too large for the known state at this energy with J π =. If this group corresponds to a doublet, the other member should have J =. h Sharp group; if due to a single state J = i J = (, 9, ). j The total cross section to this state is very high implying unresolved states: if there are two states one must have J >..

12 Table 9.: Levels of 9 O from O(t, p) and 8 O(d, p) a E x (MeV ± kev) Γ c.m. (kev) l n b l n c S d J π ± ± ±.0 ( 4) 9.90 ± 0.9 ().06 ±.6 ( 4). ±.4 (0 ) (0.06). ±.944 ± ± < () ± < 4.40 ± < 4.84 ± ± ± < ± <.0 ± 0 < ± 0 0 ± ( 4) ± <.4 ± < 0. ( ) 6.80 ± < ± 6.60 ± ± 6.99 ±. ±.48 ± a For references see Table 9. in (98AJ0). However, see note in Table 9.4 of (98AJ0) concerning errors in that table and subsequent corrections. b 8 O(d, p) 9 O. c O(t, p) 9 O. d E d = 4.8 MeV: polarization and differential cross section measurements. The spectroscopic factors for the states with E x > 4. MeV have been calculated in the weakly bound approximation: see (98AJ0).

13 Table 9.6: Resonances in 8 O(n, n) 8 O a E res (MeV ± kev) Γ c.m. (kev) 9 O* (MeV) J π 0.6 ± b ± b.0.6 ± 0 b.4 ±.0 b.46.4 c ± 0 b.8 ±.4 b ±.4 b d 0.66 (), a These data are from a multi-level R-matrix re-analysis by (986KO0) of the work displayed in Table 9.4 of (98AJ0), together with unpublished σ t data by G.F. Auchampaugh, and σ(θ) for n 0 and n for.0 < E n <. MeV. Uncertainties in E x and Γ cannot be estimated. See also (986KO0) for other states and see footnote a in Table 9. of (98AJ0). b See Table 9.4 of (98AJ0). c See discussion in (986KO0). d May be a doublet, but at least one of the states has J π = (986KO0) F(π, γ) 9 O Q m = 4.49 Transitions to 9 O*(0[u], 4.9, 6.) have been observed in the radiative capture of stopped negative pions (98MA6).. 9 F(n, p) 9 O Q m = 4.0 See (986HEZW; E n = 00 MeV).. 9 F(t, He) 9 O Q m = 4.800

14 Table 9.: Levels of 9 O from 8 O(α, He) 9 O a E x (MeV) l J π b σ Int c (mb) d e a (99YA08) E α = 6 MeV; DWBA analysis. 0. b Cited from (98AJ0). c Integrated cross section. d See discussion of this level in (99YA08) and (94SE0). See also Table 9.6 here. e Proposed in (99YA08). Differential cross sections for the 9 O ground state and E x = 0. MeV state were measured at E t = MeV (99PI09). A DWBA analysis was carried out. GENERAL: See Table F (Figs. and 4) r / =.88 ± 0.0 fm [see (98AJ0)] µ g.s. = (8) nm (98LEZA) µ 0.9 =.60 (8) nm (98LEZA) Q 0.9 = 0. ± 0.0 b (98LEZA). 0 B( 9 Be, X) 4

15 Table 9.8: 9 F General Reference Description Shell Model Reviews: 988BRP 988ELB Other articles: 98BR0 98LE 98RA6 988BR 989OR0 990GU0 990HA0 990SK04 99MA4 99FR0 99GU6 99JI04 99WA 99PO 99VO0 994VE04 Status of the nuclear shell model Review of early attempts to describe the spectrum of 9 F using the shell model Empirically optimum M operator for sd-shell nuclei A shell-model study of nuclear form factors for multi-nucleon transfer reactions Strong-absorption model analysis of elastic and inelastic He scattering Semi-empirical effective interactions for the s-0d shell Empirical isospin nonconserving Hamiltonians for shell-model calculations Charge densities of sp- and sd-shell nuclei and occupation numbers of s states Neutrino nucleosynthesis in supernovae: shell model predictions A = 8 nuclei, effective interaction in the sd shell (also calc. A = 9 energy spectra) Finite nuclei calculations with realistic potential models Nuclear charge radii systematics in the sd shell from muonic atom measurements Root-mean square radii of sd-shell nuclei Bonn potential used to evaluate energy spectra of some sd-shell nuclei Effective interactions for the 0ps0d nuclear shell-model space Shell-model calcs. of binding energies and magnetic moments of light nuclei Spin-Isospin SU(4) symmetry in sd- and fp-shell nuclei Exp. meas. & calc. of spectroscopic factors from one-proton stripping rxns on sd-shell nucl. Cluster Models 988UT0 Quasi-free stripping rxns. extended Serber model & cluster momentum distributions 990OS0 Cluster-stripping reactions in heavy-ion collisions (including 6 O( Li, α) 9 F) 99LE0 Algebraic approach to α-cluster states in 9 F: predicted energy spectrum (SU() U()) 99LE08 Alg. approach to α-cluster states in 9 F: calc. EM & other properties comp. to exp. data 99OS04 Diff. cross-section of cluster transfer heavy-ion reactions in the whole angle region 99SA (t 6 O) (α N) cluster model study of electron scattering on 9 F: calc. form factors 99AB0 α- 6 O and α- N optical potentials in the range between 0 and 0 MeV

16 Table 9.8: 9 F General cont. Reference Description Special States Reviews: 988BRP 988GAO 988HEC Other articles: 986ADZT 988TA 989HA 989OR0 990KAF 990SK04 99LE0 99RAN 99ZH Status of the nuclear shell model Nucleon-alpha reactions in nuclei Symmetries and nuclei Parity and time-reversal violation in nuclei and atoms Coupled channel representation of phase anomaly observed in scattering of 9 F C Nucleon and nuclear anapole moments Empirical isospin nonconserving Hamiltonians for shell-model calculations Theoretical aspects of nuclear parity violation A = 8 nuclei, effective interaction in the sd shell (also calc. A = 9 energy spectra) Algebraic approach to α-cluster states in 9 F: predicted energy spectru (SU() U()) Mechanism of (n, γ) reaction at low neutron energies Isospin selection rules and widths of highly-excited states of light nuclei Electromagnetic Reviews: 988ARI 988HEE 99GOQ 99EN0 Other articles: 98BR0 990PIG 99LE08 Relativistic and quark effects in nuclear magnetic moments Report on charge symmetry, charge independence, parity and time reversal invariance M4 excitations of p-shell nuclei Strengths of gamma-ray transitions in A = 44 Nuclei Empirically optimum M operator for sd-shell nuclei Coherent EM excitation & disintegration of relativistic nuclei passing through crystals Algebraic approach to α-cluster states in 9 F: calc. EM, etc. comp. to exp. data Astrophysics Review: 988APA 989BAP 990AR0 Neutrino diffusion, primordial nucleosynthesis and the r-process Neutrino astrophysics Nuclear reactions in astrophysics 6

17 Table 9.8: 9 F General cont. Reference Description Astrophysics cont. 990THE 99HA48 Other articles: 98DWA 988CA6 988HAT 988WOC 989JIA 990HA0 990MAZ 990SID 990WEI 99RYA 99GA0 Summary of topics presented at Workshop on Primordial Nucleosynthesis Core-collapse supernovae & other topics that combine nuclear, particle and astrophysics Cosmic-ray elemental abundances from to 0 GeV per amu for boron through nickel Analytic expressions for thermonuclear reaction rates involving Z 4 nuclei Neutrino preheating in supernovae, and the origin of fluorine (A) Supernova neutrinos, neutral currents and the origin of fluorine Nucleosynthesis inside thick accretion disks around massive black holes Neutrino nucleosynthesis in supernovae: shell model predictions Nuclear reaction uncertainties in standard & non-standard cosmologies Spallation processes and nuclear interaction products of cosmic rays Cosmic-ray source charge & isostopic abundances studied using fragmentation X-sects. Detecting solar boron neutrinos with Cerenkov and scintillation detectors Direct processes in Li C & Li 9 Au breakup rxns., extract astrophys. X-sects. Applications 98BH0 98FRF 98KN0 988ALK 988KO8 988UMA 989TAN 990ZI04 990ZS0 99MC0 99PI 99MO 99ZS0 994TAB Time differential perturbed angular distribution studies on 9 F implanted into diamond Explanation of unexpected efg s in 9 F-time differential perturbed angular distrib. meas. Attenuations & atomic spin precessions of γ-angular correls. for Coulomb-excited 9 F Analysis of Desert Rose (geological sample) using RBS and PIXE techniques (A) Experimental study on p-wave neutron strength functions for light nuclei Quantitative H analysis; simultaneous detection of α s and recoil H s in H( 9 F, αγ) 6 O Depth profiles of implanted 8 F, 9 Br & Xe in Si in the energy range kev Study of fluorine in tin oxide films Fluorine profiling after application of various anti-caries dental gels X-ray production in fluorine by highly charged boron, carbon, and oxygen ions Enhancement of role of low multipole transitions in Coulomb excit. of nucl. in crystals 9 F & P magic-angle spinning NMR of Sb(III)-doped fluorapatite phosphors Test of new standard for F determination using p-induced γ-ray emission spectrometry An investigation of range distribution parameters of implanted 9 F ions in Tantalum

18 Table 9.8: 9 F General cont. Reference Description Complex Reactions Review: 989NID High energy gamma-ray production in nuclear reactions Other articles: 986MA Experimental search for nonfusion yield in heavy residues emitted from B C 98BE8 Target fragmentation at ultrarelativistic energies 98BU0 Projectile-like fragments from 0 Ne 9 Au counting simultaneously emitted neutrons 98HEH Search for anomalously heavy isotopes of low Z nuclei 98LY04 Fragmentation and the emission of particle stable and unstable complex nuclei 98PAD Recoil accelerator mass spectrometry of nuclear reaction products 98SH Dissipative phenomena & α-particle emission in reactions induced by 6 O Al 98YIA Deep inelastic collision induced by 9 MeV 4 N on nat Ca 988CA Experimental indications of selective excitations in dissipative heavy ion collisions 988DI08 Molecular orbital theory of -cluster transfer process in heavy-ion scattering & rxns. 988SH0 8 Si 4 N orbiting interaction 989BA9 Evaluation of hypernucleus production cross-sections in relativistic heavy-ion collisions 989BA9 Production of hypernuclei in relativistic ion beams 989BR Fragmentation cross sections of 8 Si at 4. GeV/nucleon for Z f = 6 989CA Fusion and binary reactions in the collision of S on 6 Mg at E(lab) = 6. MeV 989GR Compound nucleus emission of intermediate mass fragments in 6 Li Ag at 6 MeV 989GUC Peripheral collisions in Ar-induced rxns: energy dissip. study meas. via n multiplicities 989HA08 Complex-fragment emission in.6 MeV/nucleon 6 Cu C & 6 Cu Al rxns. 989MA4 Target excitation & angular momentum transfer in 8 Si 8 Ta at E/A =.9 MeV 989PA06 Complete & incomplete fusion of 6 MeV/nucleon light heavy ions (incl. 9 F) on V 989SA0 Total cross sections of reactions induced by neutron-rich light nuclei 989YO0 Quasi-elastic & deep inelastic transfer in 6 O 9 Au for E < 0 MeV/u 989YO09 Energy damping feature in light heavy-ion reactions 989ZHZY Mass measurement of Z = 9 neutron-rich nuclei using the TOFI spectrometer (A) 990AL40 The activation method in experiments searching for neutron nuclei 990BO04 paths for intermediate-mass fragment formation from 640-MeV 86 Kr 6 Cu 990DE4 Reaction mechanisms and their interaction time from 9 F 6 Cu at MeV 990LE08 Statistical equilibrium in the 40 Ar C system at E/A = 8 MeV 990YE0 Intermediate mass fragment emission in the 6-MeV p Ag reaction 994PI0 In flight electromagnetic excitation of low-lying levels at energies up to a few GeV/A 8

19 Table 9.8: 9 F General cont. Reference Description Muons and Neutrinos 990CH 990HA0 99RYA 99DO 99GO09 Muon capture rates in nuclei calculated & compared to experimental values Neutrino nucleosynthesis in supernovae: shell model predictions Detection of solar neutrinos using Cerenkov and scintillation detectors Inelastic neutrino scattering by atomic electrons Measurement of hyperfine transition rates in muonic 9 F, Na, P and nat Cl Pions & hypernuclei Review: 988HEG 994EJ0 Other articles: 989BA9 989BA9 989GA09 989GE0 989KA 990CH 99CI08 99CI 99NI0 Hadronic parity violation: a summary of theoretical discussion Perspectives on the study of hypernuclear structure Evaluation of hypernucleus production cross-sections in relativistic heavy-ion collisions Production of hypernuclei in relativistic ion beams Pionic distortion factors for radiative pion capture studies Threshold pion-nucleus amplitudes as predicted by current algebra Finite-range effects on strong-interaction level shifts & widths in pionic atoms Inclusive radiative pion capture in nuclei reanalyzed from a many-body point of view Momentum-space method for calc. of strong-interaction shifts & widths in pionic atoms Nuclear structure effects in light π-mesoatoms Pionic decay of Λ hypernuclei Antimatter 986KOE 98GR0 98HAJ 990JO0 99PI0 Search for p-atomic X-rays at LEAR Widths of 4f antiprotonic levels in the oxygen region Widths of 4f antiprotonic levels in the O region using realistic nucl. wavefunctions The strong-interaction fine and hyperfine structure of antiprotonic atoms Coulomb excitation of E & E transitions in 9 F of LiF crystals by p & p 9

20 Table 9.8: 9 F General cont. Reference Description Ground State Properties Review: 989RA 99PYA Other articles: 98BR0 988ARI 989AN 989GU 989SA0 990GU0 990LO 99FR0 Compilation of exp. data on nuclear moments for ground & excited states of nucl. Nuclear quadrupole moments for Z = 0: precise calcs. on atoms & small molecules Empirically optimum M operator for sd-shell nuclei Relativistic and quark contributions to nuclear magnetic moments A-dependence of the difference (r el r mu ), a dispersion effect in electron scattering Determin. of spectroscopic factors of several light nuclei from nuclear vertex constants Total cross sections of reactions induced by neutron-rich light nuclei Charge densities of sp- and sd-shell nuclei & occupation numbers of s states Self-consistent calcs. of bind. energies & various radii using density-functional method Nuclear charge radii systematics in the sd shell from muonic atom measurements (A) denotes that only an abstract is available for this reference. Figure : Energy levels of 9 F. In these diagrams, energy values are plotted vertically in MeV, based on the ground state as zero. Uncertain levels or transitions are indicated by dashed lines; levels which are known to be particularly broad are cross-hatched. Values of total angular momentum J, parity, and isobaric spin T which appear to be reasonably well established are indicated on the levels; less certain assignments are enclosed in parentheses. For reactions in which 9 F is the compound nucleus, some typical thin-target excitation functions are shown schematically, with the yield plotted horizontally and the bombarding energy vertically. Bombarding energies are indicated in laboratory coordinates and plotted to scale in cm coordinates. Excited states of the residual nuclei involved in these reactions have generally not been shown; where transitions to such excited states are known to occur, a brace is sometimes used to suggest reference to another diagram. For reactions in which the present nucleus occurs as a residual product, excitation functions have not been shown; a vertical arrow with a number indicating some bombarding energy, usually the highest, at which the reaction has been studied, is used instead. Further information on the levels illustrated, including a listing of the reactions in which each has been observed, is contained in the master table, entitled Energy levels of 9 F. 0

21

22 Table 9.9: Energy levels of 9 F a E x (MeV ± kev) J π ; T K π τ m or Γ c.m. Decay Reactions 0 ; ± ± ± ± ± ± ± ± ± ± ± ± ± 4.68 ± ± 0.9 (). ±.48 ± stable 9,,,,, 8, 9,,,, 4,, 6,,,, 4, 9, 4, 4, 4, 46, 48, 49, 0,,,, 4,, 6,, 8, 9, 60, 6, 6 τ m = 0.8 ± 0.00 ns γ 9,,, 8, 9, 4, 6,, 4,, 8, 9, 4, 4, 49, 8, 60, 6 τ m = 8.8 ±. ns [ g =.44 ± 0.00] τ m = 4. ± 0.06 ps [ g = 0. ± 0.04] γ 8, 9,,,, 8, 9, 4,, 6,,, 4, 9, 4, 4, 4, 49,,, 8, 60 γ 9,,,, 8, 9, 4, 6,, 4, 9, 4, 4, 4, 49 τ m = 90 ± 0 fs γ,, 8, 9, 4,,, 9, 4, 4, 4, 49,, 60 τ m = ± fs γ 9,, 8, 9, 4,, 6,,,, 4, 9, 4, 4, 4, 49,,, 8, 60 τ m = 80 ± 0 fs γ, 4,, 9,, 4,, 8, 9,, 4,,,, 9, 4, 4, 49,,, 9, 60 τ m = 9 ± fs γ 9, 8, 9, 4, 6,, 4,, 9, 4, 49, 60 τ m = 9 ± fs γ 9, 8, 9, 4,,,, 9, 4, 49, 60 τ m = 6 ± fs γ 9,,, 8, 9, 4,, 9, 4, 49, 60 τ m < fs γ 4, 9,, 8, 9, 4,, 6,,, 4, 9, 4, 49, 60 τ m < 0 fs γ 9, 8, 9, 4, 6, 9, 4, 49, 60 τ m = 0 8 fs γ 9, 8, 9, 6,,, 9, 4, 49, 60 τ m =. ± 0.4 ps γ 4,, 8, 9, 4,, 6, 9, 49, 60 τ m =.4 ±.0 fs γ, α 4, 9, 8,, 4, 6,,, 9, 4, 49, 60 τ m < 0 fs γ, α 4, 9, 8, 9, 4, 6,,, 9, 4, 49, 60 τ m 0. fs γ, α 9, 8, 9, 4, 6,,, 9, 4, 49, 60 Γ = (.6 ± 0.) 0 kev γ, α 4, 9, 8, 4, 6,,, 9, 4, 49

23 Table 9.9: Energy levels of 9 F a (continued) E x (MeV ± kev) J π ; T K π τ m or Γ c.m. Decay Reactions.46 ±..00 ±.. ±.6 ±.98 ± 6.00 ± ± 6.00 ± ± ± 6.8 ± 6.0 ± 6.49 ± ± ± ± ± 6.9 ± ± ± ± ± ± ().4 ± 6.66 ± 0..6 ±.64 ± 4.96 ± 0.9 ; τ m 0.6 fs γ, α 4, 9,,, 8, 9, 4,, 6, 9, 4, 49 Γ = 4 ± kev γ, α 9, 0, 9, 4, 6,, 9, 4, 49 γ, α 9, 4, 6,, 9, 4, 49, 60 τ m <. fs γ, α 9, 4, 6,,, 9, 4, 49, 9, 60 γ, α 9, 6,,,, 9, 4, 60 Γ =. kev γ, α 4, 9, 4, 9, 4 Γ = 4 kev γ, α 9,, 8, 9, 4, 6, 9, 4, 60 γ 4, 6, 9 Γ = (. ±.0) 0 kev γ, α 4, 9, 6,, 9, 4, 60 Γ = 8 kev α 0, 4, 6,,,, 9, 4, 60 Γ =.4 kev γ, α 9, 0,, 4, 6,,, 9, 4 Γ =.4 kev γ, α 4,, 0,, 4, 9, 4 Γ = 80 kev α 0, 9 γ, α 9, 9,, 6,,, 9 Γ >.4 0 kev γ, α 4, 9, 9, 4, 6, 9 Γ = 4 kev γ, α 9,, 9, 4, 6, 9 Γ =.6 kev γ, α 9, 4, 9 Γ = (.6 ±.8) 0 kev γ, α 4, 9,, 4, 6,, 9 Γ = (6.9 ±.) 0 kev γ, α 9, 0, 4, 6,, 9 Γ =. kev γ, α 9, 0, 4, 6, Γ = 8 kev γ, α 9, 0, 4, 9 Γ =.4 kev γ, α 4, 9, 0,,, 8, 4, 6,,, 9 Γ = kev α 0, 6, 9 Γ = kev α 0,, 9 Γ = (6.9 ±.) 0 kev γ, α 4, 9, 6, 9 Γ < 6 kev α 0,, 8, 9, 6,,, 9, α 9, 6,,,, 9 Γ = 0.6 ± 0.0 kev c γ, α 9, 0,,, 6,,, 9 Γ < 90 kev α 0.6 ± 0.8 ( ) γ 9 ;.6606 ± 0.9 Γ = 0.00 ± kev γ, α 9, 0, 6,,,, 9, 6.0 ± Γ < 0 kev α 0,, 6,, 9.4 ± 40 (, ) Γ < 6 kev 9,

24 Table 9.9: Energy levels of 9 F a (continued) E x (MeV ± kev) J π ; T K π τ m or Γ c.m. Decay Reactions (.90) Γ < 00 kev α 0, 9.99 ±.9 ± γ, α 9,, 9 γ, α 9, ±.0 p, ± Γ kev p, α 0, 0, 8. ±. Γ 0. kev γ, p, α 0, 6, 0,, (8.6) Γ < 0 kev α ±.0 ( ) Γ < 0.8 kev γ, p, α 0, 6, 0, 8.4 ±.6 (, ) Γ. kev γ, p 6,, 8.88 ± 8.00 ±. 8.0 ± ± ± ± 4 8.6, ( ) Γ < kev c γ, α 4, 9, 0,,,, 4,, 8 Γ = 0.04 ± 0.09 kev γ, p, α 9, 6, 0, Γ =. ±. kev γ, α 9 Γ 0. kev γ, p, α 9, 6 Γ =.0 ± 0. kev γ, p, α 9,, 6, 8, 0, Γ < kev c γ, α 4, 9, 0, Γ 00 kev γ, p, α 6, 8, 0 ; Γ = 46 ± kev γ, p 6, 8, 0,, 8.9 ± ± 4 < 9 Γ kev γ, α ± ± 9.00 ± Γ =.6 ± 0. kev γ, p, α, 8, 6, 8, 0 d Γ kev c γ, α 4, 9, 0,,,, 4, Γ = 4. ± kev γ, α ± 0. Γ = 0. ± 0.0 kev γ, p, α 9, 6, 8, ± ± ±, 9 Γ kev γ, α 4, 9, Γ = 6. ± 0. kev γ, p, α 9, 8, 0, Γ = 0. ±. kev γ, α 9 Γ = ± kev γ, α 9, ± ± (, 9 ) Γ <. kev γ, α 9, 9.8 ± Γ =.4 ± 0. kev γ, p, α 9,, 6 9. ±. Γ =.0 ± 0. kev γ, p, α 8, ± 4 < Γ 6 kev γ, α 9, 9.09 ± 4 9. ± 6 ( 9.64 ± ± 9. ± 4 c Γ < kev c γ, α 9, 0 ) Γ = 8 kev p, α 8, 0 Γ = 6. ±. kev γ, p, α 9, 6 Γ = 6 ± kev γ, p 6 Γ = 6 ± kev γ, p, α 6, 8, ± Γ = 8.9 ±. kev γ, p, α 9, 6, 9.64 ± 6, Γ 8 kev γ, α 9 4

25 Table 9.9: Energy levels of 9 F a (continued) E x (MeV ± kev) J π ; T K π τ m or Γ c.m. Decay Reactions 9.64 ± 6, Γ 6 kev γ, α ±. Γ =.6 ± 0.4 kev γ, p, α 9, 6, 8, 0, ± 4, c Γ < kev c γ, α 4, 9, 0, 9.80 ±.0 Γ = 0. ± 0.0 kev γ, p, α 9, 6, 8, ± Γ < kev c γ, α 4, 9, ±.8 Γ = (.6 ± 0.6) 0 kev γ, p, α 4, 9, 0,, 8, ± Γ = ± kev γ, p, α 6, 8, ± γ ± 9 ;, ± 0. ± ± 0. ± 0.4 ± 0.08 ± ± 4 c Γ kev c γ, α 4, 9, 0 c Γ <. kev c γ, α 9, 0, Γ = 4. ± 0.6 kev γ, p, α 9, 6, 0 Γ = kev p, α 8, 0 Γ < kev p, α 0, 8, 0 Γ = kev p, α 8, 0 Γ = 9. kev p, α 0, 9, 8, 0 Γ = ±. kev γ, α 4, 9, Γ <. kev c γ, α 4, 9, 0,,, 8, 9, 6, ± ± 4 Γ =.0 ±. kev p, α ± 4 Γ = 4.8 ± 0.8 kev p, α ±. Γ =. ± 0.6 kev n, p, α 0,, 8, 0 0. ± 4 Γ = 4 ± kev p, α 0, 0.4 ±. Γ =. ± 0. kev n, p, α 0, 0. ± ; ( ) Γ = 4.0 ±. kev p, α 0, 8, ±.0 Γ = 4.6 ± 0. kev n, p, α 0, 0.8 ± 4 ( ) Γ = ± kev p, α 8, ± ±. ; Γ = 4. ± 0. kev n, p, α, 8, 0 Γ = 6 ± kev n, p, α,, 8, ±.9 Γ = 40 ±. kev n, p, α, 8, ± 8 γ ±. (, ) Γ = 4 ± kev n, p, α, 8, ±. Γ = ± kev n, p.0 ±. Γ = ± 4 kev n, p, α, 8, 0.88 ± 4 ( ) Γ = ± 4 kev n, p, α, 8, 0. ± Γ = ± kev n, p.86 ±. ±.40 ±. Γ = ± kev n, p, α, 8, 0 Γ = ± kev p 8 Γ = 8 ± kev n, p, (α),, 8, 0

26 Table 9.9: Energy levels of 9 F a (continued) E x (MeV ± kev) J π ; T K π τ m or Γ c.m. Decay Reactions.48 ± Γ = ± kev n, p.0 ± ( ) Γ = 4 ± kev n, p, α, 8, 0.40 ± Γ = ± kev n, p, α, 8, 0.69 ± (T = ) Γ = ± 0 kev n, p.60 ± Γ = 6 ± kev n, p, 8.6 ± 4 ; ( ) Γ = ± 6 kev n, p, (α),,, 8, 0.84 ± 0 Γ < 0 kev n, p.9 ± 0 Γ = 90 kev n, p.04 ± 0.6 ± 8. ±. ±. ± 0.8 ±.8 ± 0 ; ; ; ;.86 ± 0.94 ±.98 ± ± 4 Γ = ± 4 kev p, α, 8, 0 Γ = 0 ± 4 kev n, p, (α), 8, 0 Γ = 4 ± kev n, p, α, 8, 0 Γ = ± 4 kev p 8 Γ = 48 ± 0 kev p, α 8, 0 Γ = 8 ± 48 kev p 8 Γ = 9 ± 8 kev n, p, (α),, 8, 0 Γ = 6 ± 8 kev p 8 Γ = ± 4 kev p, α 8, 0 Γ = 4 ± 8 kev p 8 Γ 0 kev n, p, t,.09 ± Γ = 8 ± kev p 8. ± Γ = 0 kev n, p.4 ± 0. ± 8.6 ± Γ = kev t.0 ± 0 Γ = 4. kev t ; ( ) Γ = 8 ± 6 kev n, p, α, 8, 0,. ± 0. ±.88 ± 4.04 ± ± ; Γ = 8 ± 9 kev p 8 Γ = kev t Γ = ± 0 kev n, p, (α) 8,, 8, 0, Γ = 0 kev t Γ = 4 ± 8 kev p 8 Γ = 84 ± 8 kev p, 8, ± 0 Γ = kev t 4.4 ± Γ = 0 kev n, p 4. ± 4. ± 0 4. ± ± 4.46 ± Γ = kev t Γ = 6 ± 8 kev p 8 Γ = 4 kev t Γ = 9 kev t Γ = 46 kev t 6

27 Table 9.9: Energy levels of 9 F a (continued) E x (MeV ± kev) J π ; T K π τ m or Γ c.m. Decay Reactions 4.0 ± 0 4. ± ± ± 0 Γ = 4 ± 8 kev p 8 Γ = ± 6 kev α 0 Γ = 6 ± 6 kev p, α 8, 0 n, p, ± 0.00 ± 0 n, p.6 ± 0 p, 8, 8 p 8.40 ± 0 p 8.6 ± 0 8. ± Γ = 0 kev n, p 6.09 ± ± ± 0 p 8 p ± 0 Γ = 00 kev n, p, ± ± 0 n, p.0 ± 40.6 ± 40.4 ± 0.6 ± 60.9 ± 40 Γ = ± 6 kev p 8 Γ = ± 6 kev p 8 Γ = ± 9 kev p, 8 Γ = 9 ± kev p 8 Γ = ± kev p ± 60 Γ = 6 ± kev p, ± ± ± ± ± ± 0.0 ± 40 a See also Tables 9.0 and 9.. b For evidence of additional states see reaction 6. c See Table 9.4. d See (989PR0). Γ = ± 4 kev p 8 Γ = 69 ± kev p 8 Γ = 4 ± kev p, 8 Γ = 4 ± kev p 8 Γ = ± 48 kev p 8 Γ = 448 ± 9 kev p 8 Mass distribution from the sequential decay of the compound nuclei formed from 0 B 9 Be and 0 B 0 B at E lab /A = MeV were measured by (99SZ0). It was determined that the hot

28 composite systems as light as 9 F and 0 Ne can behave like liquid droplets with no remnant shell effects.. C( Li, Li ) C E b = 6.9 Vector analyzing power measurements for the elastic scattering have been reported at E( Li) =. MeV (984MO06). Fusion cross sections have been measured by (98DE0). For other channels in the interaction of C Li see (98AJ0, 98AJ0, 98AJ0) for earlier work. More recently, neutron yield spectra for 40 MeV Li on C were measured by (98SC). The C( Li, Be) B reaction was studied at projectile energies of 4,, and 6 MeV/A by (990NA4). Measurements and analysis of elastic breakup of 4 MeV Li on C are discussed in (99GA0). See also the coupled-channels investigation of the effects of projectile breakup and target excitations in the scattering of polarized Li by C at E lab = MeV by (988SA0). An evaluation of hypernuclear production cross-section by projectile fragmentation in Li C at.0 GeV/A is presented in (989BA9).. C( 9 Be, d) 9 F Q m = 0.0 For excitation curves and angular distributions involving unresolved states and 9 F*(.8) see (98AJ0, 98AJ0). 4. (a) C( B, α) 9 F Q m =.0 (b) C( C, αp) 9 F Q m = 8. (c) C( 4 N, Be) 9 F Q m =.40 States in 9 F with 4. < E x <.0 MeV were observed in reaction (a) by (989PR0) and are displayed in Table 9.. For reaction (b) see (98AJ0, 98AJ0). See also (988MA0).. (a) C( 6 Li, t) 6 O Q m = E b = (b) C( 6 Li, α) N Q m = (c) C( 6 Li, 6 Li ) C (d) C( 6 Li, p) 8 O Q m = 0.04 Uncorrelated structures have been observed in the excitation functions for reactions (a) and (b). Angular distributions have been measured for reaction (d) at E( 6 Li) = 8 MeV (988SM0). See also 8 O in the present review and see C and N in (99AJ0). Fusion cross sections have also been measured. 8

29 Table 9.0: Radiative transitions in 9 F a E i (MeV) J π i E f (MeV) Branching ratio (%) δ c 4. d < ± 0.0 ± 0. b 0.9. ± 0 0. ± ± ± ± ± 0.. < 0. h 0. ± ± ± 0.. < 0.0 h.46 < 0.4 h ± 0.0 ± ±. ± ± 4. 0 ± 4.46 ± < 0.0 < ±.0 0. ± ± ± ±. ±.46 8 ±. 8 ± ± ± ±. 4 ±.46 < 4. 6 ± 9

30 Table 9.0: Radiative transitions in 9 F a (continued) E i (MeV) J π i E f (MeV) Branching ratio (%) δ M =. ± 0. W.u ± < δ < ± ±. 0.0 ± 0.4 or i j 9. ±. Γ γ /Γ = 0.8 ± 0.0 () < ±. δ <.4..8 ± ± ± 0.9 δ = 0.0 ± ± 0. 0 ± ± ± ± 4. 6 ± 4 0 ± ± ±.46 6 ± 6 0. ± 0.0. <.9 8 ± 0.8 ±

31 Table 9.0: Radiative transitions in 9 F a (continued) E i (MeV) J π i E f (MeV) Branching ratio (%) δ () ± 0.6 ± ± ± ± 0.06 ± ± 0 ± ± ± 0.04 ± ± 0.04 ± ± 0.04 ± ± ± ± ± ± ± 0.0 ± ±.0. 6 ± 0.0 ± ± 0.0 ± ± 0. ± ± 0. ± 0.4. ± 0.0 ± ± ± ± 0.04 ± ± 0.06 ± 0.04 or.00 ± ± 0.00 ± ± ± 0. ± ± 0.00 ± ± 0. ± 0.04 or 0.90 ± ± 0.00 ± ± 0. ± ± 0.0 ± 0.0. ± ± ± 0.0 ± ± 0. ± ± 0.0 ± 0.0

32 Table 9.0: Radiative transitions in 9 F a (continued) E i (MeV) J π i E f (MeV) Branching ratio (%) δ e ± 0.0 ± ± 0.08 ± ± 0. ± ± 0.0 ± ± ± 0. ± ± ± ± 0.9 ± 6 0. ± ±.46 4 ± ± ±. 6 ± ± 0. ± ± 0.0 ± 0.0. ± 0.0 ± ± ± ± ± ± 0. Γ γ /Γ = 0.0 ± ± ± 0..4 ; T = ± 0.09 ± ± ± 0.0 ± ± 0.04 ± ± f ; T = 0 8 ± ± ± 0.06 ± 0.0 or. ±.. 6 ± 0.06 ± ( ) 4.. ± ± ± ± 0.6.9,

33 Table 9.0: Radiative transitions in 9 F a (continued) E i (MeV) J π i E f (MeV) Branching ratio (%) δ ± ± ±. ±.9 4 ± Γ γ (tot) =. ev.94.0 ± ± 8. (, ) ± 8.9 g g, ± ± 8.9 ± ± 4 Γ γ (tot) = ± 8 mev 4.6 ± 4 0 ± Γ γ (tot) = 0. ± 0. ev. 48 ± δ = 0.0 ± 0.0 or. ± ± δ = 0.4 ± ±. 9 ±.8 0 ± ± 0 4 ± ±. ±. 0 ± 4.00 (4 ± g ) 4..0 ± ±.46.0 ± ± ± ± ± 0. 0 ± Γ γ (tot) = 0.8 ± 0. ev 0.0 ± ±. ±

34 Table 9.0: Radiative transitions in 9 F a (continued) E i (MeV) J π i E f (MeV) Branching ratio (%) δ 8.6 g ±.9 8 ± 4..6 ± ± ± ± ± ±. 6 ±.46 6 ±.8 8 ± 4.00 ± 4.0 ± 0.0 ± 6.46 ± ± ; T = 0. ± ± ± ±. 8 ±.9 ±.4 0. ± ± ± ± ± 6.. ± ± ± ± ± ± g < ± 0. ± 0. or. ± ± 0.0 ± 0.04 or.9 ± ±.0 ± 0.8 4

35 Table 9.0: Radiative transitions in 9 F a (continued) E i (MeV) J π i E f (MeV) Branching ratio (%) δ 8.9 g.46 ±.0 ±.. ± 0.0 ± 0.06 or.9 ±.8 0 ± Γ γ (tot) = 0 ± 0 mev ± ± ±.4 ± 9.0 g, ± g, 9 9. g ± ± ± 0. δ = 0.0 ± 0. or. ± ± ± 0. or.8 4 ± 0.09 ± ± ± 0. or. ± ± ± 0.0 or ± ± 0.4 or.. ± ± 0. or.0 ± ± 0. ± 0.0 or 6.0 ±..4. ± ± ± ± ± 0.0 ± 0..8 ± ± ± 6.0 ± 6. 0 ± 0.9 ±. 0 ± ± 9.0 g 0 8 ± 9. g, ± ± 4. 6 ±.8 ± ± 4.6 ±

36 Table 9.0: Radiative transitions in 9 F a (continued) E i (MeV) J π i E f (MeV) Branching ratio (%) δ 9.8 g (, 9 ) ± ± 9. g < g, ± 0.0 ± 0.08 or.4 ± ± 0. ± 0.4 or ± 0. ± 0.. ± 0. ± 0. or ± ± 0.0 or ± ± ± ± ±. 4 ±.8 ±. 6 ± 0. ±. 4.6 ± 0. ± ± 0. ± ± 0. ± ± 0. ± ± 0.4 ± 0. or ± 0.9 ± ± ± 0. ± ± 6 ± 4. ± ±.8 ±.0.4 ± 0. ± ± 0. ± ± ± 0. or. ±..8 0 ± 0. ± 0. or ± 4.00 ± 0. ±. 4. ± 9.64 g, 0.9 ±. 6 ± 4. 6 ± g,. 4 ± 9. 9 ± 9 6

37 Table 9.0: Radiative transitions in 9 F a (continued) E i (MeV) J π i E f (MeV) Branching ratio (%) δ g 9, ± 0. ± 0.04 or 0 ± ± 0.00 ± ± 0.0 ± 0.0 or. ± ± 0.00 ± ± 0.00 ± ± 0.00 ± 0.06 or 4. ±..9. ± ± 0.0 or. ± ± ± 0.00 ± 0.0 or 4. ± 0... ± ± ± ± 0.0 or. ± ± ± 0.0 or. ± ± ± ± ± ± ± ± ± g ± 0.00 ± ± ± ± 0.0 ± 0.0 or. ± ± 0.0 ± ± ± 0. or ± ± ± ± 0. or. ± ± ± 0. or.4 0 ± 0.04 ± 0.0 or ± ± ± ± 0. or.4 ±..8 6 ± 0.0 ± ± ± 0.4 ± 0.0 or. ± ± ± ± 0. or. ± ± ± ± 0.

38 Table 9.0: Radiative transitions in 9 F a (continued) E i (MeV) J π i E f (MeV) Branching ratio (%) δ g g, 0.4 g 0.9 ± 8.46 ±.9 ±.94 4 ± 6.09 ± 6. 6 ±.66 ± 0.9 ±.8 9 ±.46 0 ± 6.0 ± 6. 8 ± ± ±. ± ±.4 6 ± ±. 9 ± 4.46 ± 4 0. g g.8 ± ± ± a For references and other information see Tables 9. in (98AJ0, 98AJ0) and (98OL0). See also Tables 9., 9. and 9. here. See also Table here and (98FO0) for B(E). b M =.4 ± 0. W.u. c Γ γ /Γ = 0.9 ± 0.0. d Γ γ /Γ = 0.6 ± 0. for transition. e (98DI6). f Γ γ = 4. ev, Γ γ /Γ = 0.6 ± 0.0. g Branching ratios are the relative intensities at θ =. h (98VE0). i (980VEA) and private communication to Fay Ajzenberg-Selove (986). j g.s

39 6. C( 0 B, α) 9 F Q m = 4.8 Cross sections were measured for E( 0 B) =.6. MeV at θ lab = (988MA0). Several excited states in 9 F were studied. A fluctuation and resonance analysis was carried out. Table 9.: Lifetimes of some 9 F states 9 F* (MeV) J π τ m Refs () 0.8 ± 0.00 ns mean: see (9AJ0) 8.8 ±. ns mean: see (98AJ0) 4. ± 0.06 ps a (98BI0) 90 ± 0 fs c ± fs c 80 ± 0 fs c 9 ± fs c 9 ± fs c 6 ± fs c < fs c < 0 fs c 0 8 fs.68 ± 0.8 ps b (98BI0).4 ±.0 fs c < 0 fs c 0. fs 0.9 fs < 0.6 fs c. fs a M =.4 ± 0. W.u. (98BI0) for the E transition [. 0.]. See also (98KEC) and Table 9.8 in (98AJ0). b M =. ± 0. W.u. (98BI0). See also (98AJ0). c See Table 9.8 in (98AJ0) and Table 9. here. c c c c. C( 9 Be, t) 9 F Q m =.00 9

40 See (98AJ0). 8. (a) 4 N( Li, d) 9 F Q m = 6. (b) 4 N( C, Be) 9 F Q m =.40 (c) 4 N( 4 N, αp) 9 F Q m = 4.96 See (98AJ0). 9. N(α, γ) 9 F Q m = 4.04 Resonances in the yield of γ-rays are observed below E α = 8. MeV (E x = 0.4 MeV): the parameters for these are displayed in Table 9.. Branching ratios are shown in Table 9.0 and τ m measurements in Table 9.. The J π values shown in Table 9. are based on correlation and angular distribution measurements and on branching ratio determinations. In work reported since the previous review (98AJ0), measurements were made by (98MA) for the resonance at E x = 4.0 or 4.6 MeV. Widths of nine states between E x = 8.88 and 0.4 MeV were measured by (988HE0). These new results are included in Table 9.. See also the study by (989GA06) of the T = levels at E x =.8,.660, 9.9 MeV. The discussion in (98AJ0) notes that the 9 F levels involved in cascade decay are at E x = 999.6±., 40.9±0.4, 4± and 448± kev. The K π = band involves 9 F*(0.0[ ],.46[ ],.[ ], 4.00[ ], 4.0[ 9 ],.6[ ]) and possibly 9 F*(8.9)[ ] [J π in brackets]. See, however, reaction. See (9AJ0) for a discussion of the evidence for other assignments of J π and K π. 9 F*(0.4) is likely to be the second (s, d) state in 9 F. For references see (98AJ0). See also the comment (98DI6) and reply (98MO0) on negative-parity alpha cluster states in 9 F. 0. (a) N(α, p) 8 O Q m =.980 E b = 4.04 (b) N(α, α ) N Resonances observed in the (α, α γ) and (α, pγ) reactions and in the elastic scattering are displayed in Table 9.4. See also (98OH04). In work reported since the previous review (98AJ0), nine states in 9 F between E x = 8.88 and 0.4 MeV were studied by (988HE0). Alpha widths were measured. T = levels at E x =.8,.660 and 9.9 MeV were studied by (989GA06). These results are included in Table 9.4. In related work, optical potentials for Nα were extracted for E α = 0 0 MeV (99AB0) and alpha particle strength functions were obtained from resonance parameters by (988LE0). See also the tables of thermonuclear reaction rates (98CA4, 988CA6). Cross sections for α scattering on light nuclei for ion beam analysis are presented in (99LE). 40

41 Table 9.: States in 9 F from C( B, α) a 9 F* (MeV) b J π b Γ γ /Γ Γ α (ev) c Γ (ev) d > 0.96 > 6 0 > 0.96 (.0 ± 0.4) 0 4 > 0.8 (.0 ± 0.) 0 (4. ± 0.8) ± 0.0 (4. ±.) 0 > ± ± 0. < 0.08 > 8 < < ± ± 0.8 < > 0.8 e ± ±. < ± ± e 900 ± ± e , f < 0.0 < ± 4 66 ± 4 < ± 0 0 ± 0 < ± 0 4 ± ± ± 0. < ± ± 0. < < 0.00 (.0 ±.) 0 (.0 ±.) ± ± 0 ± f 0.0 ± a (989PR0). b Cited from (98AJ0). c See Table of (989PR0). d See Table of (989PR0) for references. e Unresolved doublet. f New level observed in (989PR0). The uncertainties in the excitation energies are ± kev and ±8 kev for the 9.89 MeV and 0.9 MeV levels, respectively. 4

42 Table 9.: Resonances in N(α, γ) 9 F a E α (MeV ± kev) Γ c.m. (kev) ωγ (ev) J π E x (MeV ± kev) 0.69 k [Γ α = (. ± 0.) 0 ev] (9. ±.0) k [Γ α < 0 6 ev] < (4.8 ± 8.) 0 6 b (6.0 ±.0) 0.8 ± ( ± 8) 0 c.68 ± i.64 ± ± 0.09 c.89 ± <. ± 0.4 c.88 ± 4 ± 4. ±. c ± 0. c.0 ± 4 0. ± ± 4 0. ± ±.0 ± ± ± ±.40 ± ±.0 ± 0..9 ± 0.6 ± ±.. ± ±.. ± ±.4 ± ± 0.6 ± 0. () ±.0 ±. ± ± 6.00 ± ± 6.60 ± 6.8 ± 6.0 ± ± ±. 6.6 ± 6.4 ± 9.6 ±.6 ± ±. ± 0.9 ±..6 ±.0 ± ± 6. ±..688 ± 9. ± ± 6.86 ± 6.89 ± ±.99 ±.00 ± 0. j.66 ± ±. ; T =.8 ± ± 0.9 ; T =.69 ± 4.96 ±. ± 0.4, ±. ± ± < 0. ± ±.48 e <. ± 0. d 8.06 ± 4.9 e. ±. 0.4 ± 0. d, 8.0 ± ±. d 8.9 ± ± 0. d, f 8.8 ±.84 e <. ± 0.4 d 8.69 ± < 0. ± 0.0 d < ± 4 4

43 Table 9.: Resonances in N(α, γ) 9 F a (continued) E α (MeV ± kev) Γ c.m. (kev) ωγ (ev) J π E x (MeV ± kev) 6.9 e 0.8 ± 0. d, ( 9 ) 8.9 ± ± 0. ± 0.6 d, 9.00 ± ± 0. d, g ± ± 0. d, ± ±..4 ± d, 9.6 ± ±.. d 9.04 ± 6.66 ± 0. ± 0.04 d 9.6 ± <. 0.8 ± 0.09 d, ± 6. e.4 ±.4 ±. d 9.0 ± < 9.9 ± < 0. ± 0. d 9.09 ± ±. 0. d 9. ± ±.. ± d 9.84 ± 4. 8 d, 9.64 ± d, 9.64 ± d, ± 6. < 4 ± 0. d ± 4.49 <.. ± 0.8 d, h 9.84 ± 4. e < ± 0. d 9.84 ±.4..6 ± 0.6 d 9, 9.8 ± ±.0 d ±.696. ± 0.4. ± 0. d, ±.49. ±. ± 0.4 d, 0.0 ± ±. 0.9 ± 0.4 d 0.6 ± <..0 ±.0 d, 9,,, 0.4 ± a For references see Tables 9.8 in (98AJ0) and 9.9 in (98AJ0). For branching ratios see Table 9.0 here. ωγ = (Γ α Γ γ /Γ) (J ). b Γ α =. ± 0. mev, Γ γ = 40. ± 8. mev. c See also Table 9. in (9AJ0). d ωγ measured at ( ) by (98SY0) are uncorrected for angular distribution effects. e Value recalculated by reviewer (98AJ0) from E x. f Γ α /Γ p = 0.06 ± g Γ α /Γ p = 0. ± Using Γ = 0. ± 0.0 kev (Table 9.8), Γ α = 0.0 ± 0.0 kev, Γ p = 0. ± 0.0 kev. h Γ α /Γ p = 0. ± 0.6. i See (98KR0). j See also (98DI6). k See (98MA). 4

44 Table 9.4: Levels of 9 F from N(α, p) and N(α, α) a E α (MeV ± kev) b Γ lab (kev) J π E x (MeV ± kev).88 ± ± 0..6 ± 0.8 ± ± ± ± ± 0.9 ± ± ± ± 0. (, ) ± ± 0 ( 9, ) ± ± 8.90 ± ± 8 4. < < f 0.6 ± < 0 4. < f ± ; T = ; T = < < < e (.00) (< 8) (.964) (.08) (< ) (.94).6 < < < < <

45 Table 9.4: Levels of 9 F from N(α, p) and N(α, α) a (continued) E α (MeV ± kev) b Γ lab (kev) J π E x (MeV ± kev).4 c 0.90 ± < c ± c. ± c 0.46 ± 0.0 () c 0. ± c < 0. ( ) c < f ± c. ± d < 9.88 ; T = ± 4.9 d 0.08 ± c 0. ± d.8 ± ± d 6.0 ± ± ± ± ± 0. ± ± 0.46 ± d.0 ±. 0.4 ± d. ± 0.60 ± 4 a For references see Tables 9.9 in (98AJ0) and 9.0 in (98AJ0). See also footnote c. b Resonances below E α =. MeV are observed in (α, α 0 ); resonances above that energy are observed in (α, pγ) and (α, α γ), except those labelled c. c N(α, α 0 ) (988HE0). The total width shown is in the c.m. system and assumes Γ tot = Γ α0. d Value recalculated by reviewer (98AJ0) from E x. e See, however, reaction. f (989GA06). The total width is in the c.m. system and assumes Γ tot = Γ α0.. N( 6 Li, d) 9 F Q m =.9 4

46 At E( 6 Li) = MeV angular distributions are reported to 9 F*(0.,.[u],.46, 4.0[u], 8.9[u]). Comparisons are made with the results from the 6 O( 6 Li, d) 0 Ne reaction, in an attempt to determine whether 9 F*(8.9) is the member of the K π = band, of which 9 F*(8.9) is the member (984MO08, 98DI6, 98MO0). Configuration mixing appears to be involved in the states [ 9 F*(., 8.9, 9.8)] and in the states [ 9 F*(4.00,.4)] to which they decay (98FO0).. N( Li, t) 9 F Q m =.4 This reaction has been studied at E( Li) = 40 MeV: see Table 9. in (98AJ0).. N( B, Li) 9 F Q m = 4.6 See (98AJ0). 4. N( C, 9 Be) 9 F Q m = 6.64 Groups are reported at E( C) = 0 MeV leading to states which are generally unresolved; J π assignments are suggested: see (98AJ0).. (a) 6 O(t, γ) 9 F Q m =.00 (b) 6 O(t, n) 8 F Q m =.69 E b =.00 (c) 6 O(t, p) 8 O Q m =.06 (d) 6 O(t, t ) 6 O (e) 6 O(t, α) N Q m =.686 For reaction (a) see (98AJ0). The excitation function for reaction (b) has been measured for E t = 0. to. MeV: there is evidence for a maximum at E t =. MeV. For resonances in the yields of p 0, p, α 0, α see (98AJ0). The elastic yield [reaction (d)] shows a large number of resonances; their parameters are displayed in Table 9.. See also (98AJ0). More recently, double differential neutron yields for reaction (b) at E x = 0 MeV were reported in (99DR0, 99DR04). An analysis of reaction (d) by a quasi-resonating-group method is described in (98ZH). A study of the isospin dependence of the A = isospin potential using reaction (d) for E x = MeV is discussed in (98EN06). See also (986AI04). 46