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GENERAL: See also (1959AJ76), (1969BE1V) and Table 19.6 [Table of Energy Levels] (in PDF or PS).

Shell model: (1957WI1E, 1959BR1E, 1960GO1C, 1960TA1C, 1961BA1E, 1962BH09, 1962HO1C, 1963HA05, 1964BR1H, 1964DR1A, 1964HA21, 1964IN03, 1965BA1J, 1965YU1A, 1966BA2E, 1966IN01, 1966LA1E, 1966RI1F, 1967AR02, 1967BO09, 1967EN01, 1967FL13, 1967GU05, 1967GU1D, 1967HA1M, 1967IN03, 1968AR02, 1968CO11, 1968EI1B, 1968EL1C, 1968GU1E, 1968GU1F, 1968GU1G, 1968HA17, 1968HA16, 1968HA26, 1968HA1P, 1968HI08, 1968MO1G, 1968WO1A, 1969BE1V, 1969GU1E, 1969KU1G, 1969MA1T, 1969SE02, 1969SE03, 1969TA1C, 1970EL1G, 1970GI11, 1970MC1J, 1970OL1A, 1971AR25, 1971AR1R, 1971GU1N, 1971LE30, 1971WI01, 1972LE1L).

Collective model: (1960RA1A, 1962DA1B, 1963CH02, 1964HA21, 1966RI1F, 1966ZA1B, 1966ZA1C, 1967BR1H, 1967RI1B, 1967SH1G, 1967ZA1C, 1968EI1B, 1968HA16, 1968RI1M, 1968UN1A, 1969BE1V, 1969BH03, 1969CU07, 1969KR02, 1970WA02, 1972LE1L).

Cluster model: (1959WI1B, 1960SH1A, 1963MA1D, 1964MA1G, 1968ME13, 1969BA2E, 1969HI1B, 1969ME1C, 1969TA1C, 1970BA2B).

Electromagnetic transitions: (1960RA1A, 1960RO1C, 1963BE03, 1963CH02, 1964BR1H, 1964DR1A, 1964HA21, 1966MA44, 1967GU1D, 1967IN03, 1967ZA1C, 1968BA2K, 1968EL1C, 1968GU1G, 1968HA17, 1969BE1V, 1969CU07, 1969HI1B, 1971AR25, 1971GU1N).

Pion and muon reactions:^† (1967BA78, 1967KA1C, 1967MI1B, 1968BA2G, 1968WI1B, 1969CH1C, 1969MO1E, 1969PL1B, 1969PO07, 1970BA1E, 1970BL07, 1971FA09, 1971TH05).

Special levels: (1959LA1A, 1960SH1A, 1961TR1B, 1964DR1A, 1964HA21, 1966BR1H, 1966MA44, 1967EN01, 1967SH1G, 1968AR02, 1968BA2K, 1968CE01, 1968HA1P, 1968SO1A, 1968YA03, 1969BE1V, 1969CU07, 1969GA1G, 1969HA1G, 1969HA1F, 1971AR1R).

Special reactions: (1967AU1B, 1968MI05).

Astrophysical questions: (1970BA1M).

Other theoretical topics: (1964IN03, 1964KA1A, 1965AM1A, 1965FA1B, 1965GO1F, 1965OK1A, 1965RO1H, 1965WO1C, 1965YO1A, 1966DA1E, 1966DO1C, 1966GI1A, 1966SU1D, 1967FL13, 1967GU05, 1967NE1D, 1967OS02, 1968DW1A, 1968GA03, 1968GU1E, 1968GU1C, 1968GU1G, 1968MO1G, 1968PA1Q, 1969LO06, 1969MA1T, 1971LE1H, 1972LE1L).

Ground state: μ = +2.628383 ± 0.000005 nm (1964BA11: see also (1969FU11)). See (1963BE36, 1963CA1B, 1964BO37, 1964BR1H, 1964DR1A, 1964LI14, 1964ST1B, 1965HU13, 1966RI12, 1967CO1D, 1967GU1D, 1967PA1G, 1967SH14, 1968EL1C, 1968HI08, 1968LE1L, 1968PE16, 1969HI1B, 1969WU1A, 1970LE1A, 1971AR25, 1971GU1N, 1971WI01, 1972LE1L).

1. 9Be(14N, α)19F

Qm = 13.273

See (1958GO71).

2. (a) 12C(7Li, n)18F	Qm = 5.964	Eb = 16.395
(b) 12C(7Li, p)18O	Qm = 8.402
(c) 12C(7Li, d)17O	Qm = 2.580
(d) 12C(7Li, t)16O	Qm = 4.695
(e) 12C(7Li, α)15N	Qm = 12.382

The yield of ¹⁸F (reaction (a)) has been determined for E(⁷Li) = 2.5 to 3.5 MeV (1961NO05). The yields of the α₀, α₁₊₂ and α₃ groups (reaction (e)) have been measured for E(⁷Li) = 3.2 to 4.0 MeV by (1962HO06), while (1970CA1N) report that the cross sections for reactions (b), (c), (d) and (e) vary strongly over the range E(⁷Li) = 4 to 14 MeV but with little, if any, cross-correlation. A coherence energy of about 0.4 MeV is reported (1970CA1N). See also (1967MO23), ¹⁸O, ¹⁶O and ¹⁷O in (1971AJ02) and ¹⁵N in (1970AJ04).

3. 12C(11B, α)19F

Qm = 7.730

See (1966KU1D).

4. 12C(19F, 12C)19F

The angular distributions corresponding to the reaction ¹⁹F(0) and ¹²C(0) have been measured at E(¹⁹F) = 40 and 60 MeV (1968VO1A, 1969VO10). See also (1971BO1V).

5. 14N(6Li, p)19F

Qm = 11.148

At E(⁶Li) = 5.3, 5.6 and 6.0 MeV angular distributions have been obtained for the protons corresponding to ¹⁹F*(2.78) (1968RI13).

6. 14N(7Li, d)19F

Qm = 6.123

See (1968MI09).

7. 15N(α, γ)19F

Qm = 4.013

Thirty resonances in the yield of capture γ-rays are observed below E_α = 5.1 MeV: the parameters for these are displayed in Table 19.7 (in PDF or PS) (1957PR1A, 1969AI01, 1969AI02, 1970AI01, 1971DI09, 1971DI18, 1972RO01). Branching ratios are shown in Table 19.9 (in PDF or PS) (1969AI01, 1969AI02, 1970AI01, 1971DI18, 1972RO01), and lifetime measurements are listed in Table 19.10 (in PDF or PS) (1968TO11, 1968TOZU, 1972RO01). See also (1967TO1C).

Correlation experiments on the transitions 5.47 → 2.78 → 0.197 fix J = 9/2 for ¹⁹F*(2.78) and J = 7/2 and 1/2 for ¹⁹F*(5.46, 5.34) (1968TO11, 1968TOZU). See, however, reaction 23. Measurements of γ-ray angular distributions and radiative widths lead to the J^π values listed in Table 19.7 (in PDF or PS) (1969AI01, 1969AI02, 1970AI01, 1971DI18) as well as to J = 7/2 for ¹⁹F*(4.39) (1969AI02). The capture yield for E_α = 4.2 to 4.7 MeV is dominated by two resonances corresponding to the first two T = 3/2 states [¹⁹F*(7.54, 7.66)] with J^π = 5/2⁺ and 3/2⁺ analogous to ¹⁹O*(0, 0.097) (1969AI02). The resonance at E_α = 4.97 MeV corresponds to a J = 11/2 state at 7.935 MeV: it appears to be the 11/2⁺ member of a K = 3/2⁺ rotational band based on the 3/2⁺ state at E_x = 3.91 MeV (1971DI18). ¹⁹F*(6.09) has a very definite non-isotropic decay and hence J = 1/2 is ruled out: J^π is probably 3/2^-. ¹⁹F*(5.95, 6.08, 6.17) are tentatively assigned J^π = 1/2^(-), (7/2⁺), 7/2^(-) (D. Rogers, private communication) [see, however, Table 19.8 (in PDF or PS)].

8. 15N(α, α)15N

Eb = 4.013

The elastic scattering has been studied for E_α = 1.75 to 5.50 MeV: observed anomalies are shown in Table 19.8 (in PDF or PS) (1959SM02, 1961SM02).

9. 15N(7Li, t)19F

Qm = 1.546

This reaction has been studied at E(⁷Li) = 15 and 20 MeV. The spectra have been compared with those from the ¹⁶O(⁷Li, t)²⁰Ne reaction. The similarities suggest that ¹⁹F*(0.11) [J^π = 1/2^-] arise from the coupling of a p_1/2 hole with ²⁰Ne(0); that ¹⁹F(1.46, 1.35) [J^π = 3/2^- and 5/2^-] and ¹⁹F*(4.00, 4.04) [J^π = 7/2^- and 9/2^-] correspond respectively to the 2⁺ and 4⁺ members of the ²⁰Ne ground state band. The J^π = 11/2^- and 13/2^- states in ¹⁹F based on the 6⁺ state of ²⁰Ne at 8.79 MeV are reported at 8.25 and 8.91 MeV (± 50 keV). [See, however, reaction 7.] Angular distributions for ¹⁹F*(0.11, 1.35, 1.46, 4.00 + 4.04, 5.43, 8.25, 8.91) have been measured (1970MI1E). See also (1971AR1R; theor.).

10. (a) 16O(t, n)18F	Qm = 1.269	Eb = 11.700
(b) 16O(t, p)18O	Qm = 3.707
(c) 16O(t, t)16O
(d) 16O(t, α)15N	Qm = 7.686

The excitation function for neutrons (reaction (a)) has been measured for E_t = 0.3 to 2.2 MeV (1961LO14) and 0.7 to 2.1 MeV by (1955JA31). See also (1967CH35). Resonances in the yields of p₀, p₁, α₀ and α₁₊₂ (reactions (b) and (d)) are reported by (1967KO11), corresponding to states with E_x = 12.42, 12.67, (12.75), 12.83, 12.91, 12.97, (13.06) and (13.14) MeV (± ≈ 25 keV) [not all resonances observed in every channel]. Additional states from the α₀ yield are reported by (1965GE05). See also (1959JO32, 1967KO1G). Two pronounced peaks are observed in the elastic scattering (reaction (c)) at E_t = 2.6 and 3.2 MeV [¹⁹F*(13.9, 14.4)] (1968ET1A: E_t = 1.4 to 3.5 MeV). The elastic scattering has also been studied for E_t = 9 to 13 MeV (1965GL04).

11. 16O(α, p)19F

Qm = -8.115

At E_α = 26.7 and 33.1 MeV, angular distributions have been measured for the p_0→2, p_3→5 and p₆ groups (1961YA02).

12. 16O(6Li, 3He)19F

Qm = -4.094

This reaction (and its mirror reaction ¹⁶O(⁶Li, t)¹⁹Ne: see ¹⁹Ne) have been studied at E(⁶Li) = 24 MeV. The states most strongly excited by both reactions correspond to members of the K^π = 1/2⁺ (g.s.) rotational band, with the exception of the 7/2⁺ state. It is suggested that it is the second 7/2⁺ state (at E_x = 5.46 MeV) which is a member of the g.s. rotational band although it is more weakly populated in both reactions than predicted [see, however, Table 19.11 (in PDF or PS), footnote ^d]. Up to J^π = 9/2⁺, cross sections are observed to increase with increasing spin. Members of a K^π = 1/2^- rotational band based primarily on a configuration of four s-d shell particles and a p-shell hole are also populated in these reactions: again cross sections increase with increasing spin. Table 19.11 (in PDF or PS) presents the data on the ¹⁶O(⁶Li, ³He)¹⁹F and ¹⁶O(⁶Li, t)¹⁹Ne reactions (1971BI06). See also (1971GA1H).

13. 16O(7Li, α)19F

Qm = 9.233

At E(⁷Li) = 20 MeV, α-particles to the ¹⁹F states with E_x < 4.5 MeV have been observed (1969BI1A). At E(⁷Li) = 30.3 MeV, the excitation of ¹⁹F*(7.25, 10.2, 12.1, 13.4), in addition to lower states, is reported by (1969GL06). See also (1969RO1G; theor.).

14. (a) 17O(d, n)18F	Qm = 3.384	Eb = 13.815
(b) 17O(d, p)18O	Qm = 5.822
(c) 17O(d, α)15N	Qm = 9.802

For reaction (a) see ¹⁸F and (1950HO80). For reaction (b) see ¹⁸O; for reaction (c) see ¹⁵N in (1970AJ04).

15. 17O(t, n)19F

Qm = 7.557

Not reported.

16. 17O(3He, p)19F

Qm = 8.321

Not reported.

17. 17O(α, d)19F

Qm = -10.032

See (1963HA1C).

18. 18O(p, γ)19F

Qm = 7.993

Resonances for capture radiation observed for E_p = 0.3 to 3.0 MeV are displayed in Table 19.12 (in PDF or PS) (1959BU05, 1962NE03, 1963HU07, 1965AL20, 1969DU1A, 1969WO1F). At the E_p = 0.85 MeV resonance [¹⁹F*(8.80)], the intensity of the transition 8.80 → 3.91 and the anisotropy of the 8.80 → 3.91 → 0 γ-rays limit J of ¹⁹F*(3.91) to 3/2 or 5/2. J = 5/2 is ruled out by the angular distribution of the γ-rays. At the E_p = 1.17 MeV resonance [¹⁹F*(9.10)], the angular distribution of the γ-rays to the 5/2⁺ state at 0.197 MeV indicate J^π = 7/2⁺ [9/2⁺ not completely excluded] for ¹⁹F*(9.10). J = 5/2 or 9/2 is suggested for ¹⁹F*(2.78). The γ-decay of the resonances at E_p = 1.77 and 1.93 MeV is very complex (1965AL20). For branching ratios and Γ_γ, see Table 19.9 (in PDF or PS) (1962NE03, 1965AL20, 1969WO1F). See also (1969SK1A) and (1959LA1A).

19. 18O(p, n)18F

Qm = -2.438

Eb = 7.993

Recent yield measurements are reported for 2.5 to 3.0 MeV (1967PR04), 2.6 to 3.0 MeV (1960BL05; σ_t), 2.6 to 3.3 MeV (1969BE57: rel. total yield, high resolution), 3.0 to 7.0 MeV (1969DI07; n₁γ, n₂γ, n₃γ and n), 3.5 to 10 MeV (1964BA16; σ_t), 3.6 to 4.0 MeV (1968BE34; n₁γ, n₂γ, n₃γ) and 6.9 to 13.5 MeV (1965BL07, 1969AN06; σ_t for n₀, n₂ (unresolved), n₅, n₆, n₇, n₈ (unresolved); not all groups over the entire range). See also (1959BR06). Observed resonances are displayed in Table 19.13 (in PDF or PS) (1956MA18, 1964BA16, 1967PR04, 1968BE34, 1969BE57, 1969DI07).

(1969AN06) find that the rather large cross section for the reaction to ¹⁸F(0) [ΔT = 1, ΔJ = 1] over the range E_p = 6.9 to 13.5 MeV and the cross section for the reaction to ¹⁸F*(3.06) [ΔT = 0, ΔJ = 2] indicate the operation of a spin-flip mechanism in the effective two-body force, and a sizable value for the quadrupole term in the multipole expansion of that force.

For a summary of threshold measurements and angular distribution studies, see ¹⁸F.

20. 18O(p, p)18O

Eb = 7.993

Scattering studies have been carried out at E_p = 0.60 to 1.45 MeV (1962YA03, 1962YA1B; p₀), 0.79 to 3.55 MeV (1961CA02; p₀ (and p₁γ at higher energies)), 1.39 to 3.20 MeV (1969SE02, 1969SE03; p₀, high resolution), 1.7 to 3.5 MeV (1962SO01, 1964ST1E; p₀), 2.5 to 3.0 MeV (1967PR04; p₁γ), 3.0 to 7.0 MeV (1969DI07; p₁γ), 3.2 to 5.4 MeV (1968BE34, 1969BE13; p₁γ), and 7.9 to 16.3 MeV (1964ST1D, 1966ST04; p₀, p₁). For a spallation study, see (1969EP1B).

Observed resonances are shown in Table 19.14 (in PDF or PS) (1961CA02, 1962SO01, 1962YA03, 1962YA1B, 1964ST1D, 1964ST1E, 1966ST04, 1967PR04, 1969DI07, 1969SE02, 1969SE03). All the positive-parity states with large proton width observed experimentally up to E_p = 3.2 MeV can be associated with a doorway state. Both the experimental data and shell-model calculations indicate that the 5/2⁺ resonance at E_p = 2.768 MeV [¹⁹F*(10.613)] may be identified as the analog of ¹⁹O*(3.16) although isospin impurities are present in ¹⁹F*(10.613) (1969SE02, 1969SE03).

21. 18O(p, α)15N

Qm = 3.980

Eb = 7.993

Yield measurements are reported for E_p = 0.50 to 0.75 MeV (1971SK1C; α₀), 0.73 to 1.05 MeV (1963KA25; α₀), 0.79 to 3.55 MeV (1961CA02; α₀ (and α₁₊₂γ at the higher energies)), 0.9 to 2.1 MeV (1963AM1A, 1964AM1A; α₀), 1 to 3 MeV (1960CL02; α₀), 1.1 to 2.6 MeV (1964KA1B; α₀), 1.39 to 3.20 MeV (1969SE02, 1969SE03; α₀, high resolution), 2.2 to 6 MeV (1963GO08; α₀), 2.5 to 3.0 MeV (1967PR04; α₁₊₂γ), 3.0 to 7.0 MeV (1969DI07; α₁₊₂γ), 3.2 to 5.5 MeV (1969BE13; α₁₊₂γ, α₃γ), and 7.9 to 14 MeV (1964ST1D; α₀). See also (1960BL05, 1961AM01, 1964EC03, 1964SC01). Observed resonances are displayed in Table 19.14 (in PDF or PS) (1960CL02, 1961AM01, 1961CA02, 1963AM1A, 1963GO08, 1964AM1A, 1964KA1B, 1964ST1D, 1967PR04, 1969DI07, 1969SE02, 1969SE03). See also ¹⁵N in (1970AJ04).

22. (a) 18O(d, n)19F	Qm = 5.768
(b) 18O(d, nα)15N	Qm = 1.755

Thresholds for slow neutron production and for γ-rays are shown in Table 19.15 (in PDF or PS) (1956HA1A, 1958BU12, 1959BU81). Angular distributions have been measured at E_d = 3 MeV (and analyzed by DWBA) to many of the states with E_x ≤ 7.4 MeV: the closely spaced states were not resolved; however, l_p = 4 for the neutrons corresponding to ¹⁹F*(2.78), and therefore J^π = 9/2⁺, 7/2⁺. In addition, neutron groups corresponding to ¹⁹F states at 5.11 [7/2^-, 5/2^-], 5.49 [u], 5.62, 5.94, 6.09 [u], 6.26 [u] [1/2⁺], 6.53 [u] [5/2⁺, 3/2⁺, 1/2⁺], 6.80 [u] [3/2^-, 1/2^-], 6.93 [u], 7.26 and 7.40 MeV (± 0.03 MeV) are reported [(u = unresolved states)] [J^π of dominant state(s)] (1968GU07). See also (1963BE05, 1964MO23, 1969HE1P). The lifetime of ¹⁹F*(1.55) is < 1 psec (1969NI09); see, however, Table 19.10 (in PDF or PS).

At E_d = 5.0 and 5.2 MeV, reaction (b) appears to involve ¹⁹F states at ≈ 8 to 10 MeV (1970BO08).

23. 18O(3He, d)19F

Qm = 2.499

Angular distributions of the deuterons corresponding to many states of ¹⁹F have been analyzed by DWBA: the results are shown in Table 19.16 (in PDF or PS) (1970SC25: E(³He) = 16 MeV; (1968LE18, 1970GR04): E(³He) = 11 MeV). See also (1965ER04).

The spectroscopic factors obtained by DWBA for ¹⁹F*(7.54, 8.80), the T = 3/2, J^π = 5/2⁺ and 1/2⁺ analogs of ¹⁹O*(0, 1.47) are in good agreement with those obtained for the ¹⁹O states in the ¹⁸O(d, p)¹⁹O reaction (1971FO18). See also (1970SC25). See also (1966LA1E, 1966RO01, 1967RO1F, 1970WA02; theor.).

24. 18O(α, t)19F

Qm = -11.822

Not reported.

25. 18O(6Li, αn)19F

Qm = 4.295

τ_m of ¹⁹F*(0.110) is 847 ± 10 psec: see Table 19.10 (in PDF or PS) (1969NI09).

26. 19O(β-)19F

Qm = 4.819

The decay is primarily by allowed transitions to ¹⁹F*(0.197, 1.55), J^π = 5/2⁺, 3/2⁺, with very weak branches also observed to ¹⁹F*(0.11), J^π = 1/2^- (log f₁t = 10.16) and ¹⁹F*(4.39), J^π = 7/2⁺ (log ft = 3.60): see Table 19.17 (in PDF or PS) (1959AL06, 1959JO26, 1966OL01, 1970CO22). The half-life is 26.91 ± 0.08 sec: see reaction 1 in ¹⁹O. The character of the allowed decay to the 5/2⁺ and 3/2⁺ states, and the forbiddenness of the decay to the ground state of ¹⁹F are consistent with J^π = 5/2⁺ for the ground state of ¹⁹O and then with (7/2⁺) for ¹⁹F*(4.39): see (1966OL01). Gamma-ray branching ratios are displayed in Table 19.9 (in PDF or PS) (1966OL01, 1970CO22). See also (1961OK1A) and (1970MC23; theor.).

27. 19F(γ, γ)19F

The energy of the first excited state is 109.894 ± 0.005 keV; its width is (5.1 ± 0.7) × 10^-7 eV (1962BO1A, 1962SE12). Lifetimes of ¹⁹F*(0.11, 1.46) are shown in Table 19.10 (in PDF or PS) (1962SE12, 1964BO22). The scattering cross section is relatively small and structureless in the range E_γ = 14 to 30 MeV (1967LO1B). See also (1960BO23, 1960RE05, 1962BO17).

28. 19F(γ, n)18F

Qm = -10.431

Maxima are reported at (10.6), 12.4, 14.0, 16.1, 17.2 and 19.3 MeV in the (γ, n) cross section (1960KI06). Three ground state photoneutron groups are reported, corresponding to ¹⁹F*(12.10, 12.38, 16.24) ((1971SH1G), and N.K. Sherman, private communication). These states are thought to have J^π = 1/2^- or 3/2^-; T = 1/2. See also (1960GE06, 1967BA28) and (1959AJ76). At E_γ = 20.5 MeV, the (γ, n) cross section is 3.30 ± 0.41 b (1961DE1A, 1962DE03).

The nuclear absorption cross section shows a peak at E_γ = 20.09 ± 0.05 MeV with an integrated cross section of 3.5 MeV⋅mb (1964TE04) and a very broad giant resonance extending beyond 30 MeV and with considerable strength also below 20 MeV (1969BE92). These results disagree with those of (1966DO1D, 1967NI1B) which show considerable structure. See also (1960SA09, 1965DE1J, 1970JO1H, 1971DI1F, 1971FR11) and (1958SP1A, 1959FU1A, 1971AN08; theor.).

29. (a) 19F(γ, 2n)17F	Qm = -19.581
(b) 19F(γ, 2pn)16N	Qm = -29.820

For reaction (a) see (1970JO1H); for reaction (b) see (1968ME23).

30. 19F(γ, p)18O

Qm = -7.993

Peaks are reported corresponding to ¹⁹F states at E_x = 10.4, 11.4, 11.9, (12.8), 13.6, 15.4, 16.5 and (18.1) MeV (1960FO10). See also (1963MU08, 1964SE09). See also (1961DO08, 1962BR1E) and (1958SP1A, 1965SH1D; theor.).

31. (a) 19F(e, e)19F
(b) 19F(e, ep)18O	Qm = -7.993

At E_e = 41.5 MeV (180°) the elastic scattering cross section has been measured by (1963GO04) and the excitation of a 3/2⁺ state of ¹⁹F at E_x = 7.7 MeV [T = 3/2: see Table 19.9 (in PDF or PS)] is reported by (1963BA19). The excitation of ¹⁹F*(0.197, 1.35, 1.55) has been observed by (1970HA1R): Γ_γ(1.35 → 0) = (8.1 ± 1.7) × 10^-10 eV (E3) and Γ_γ(1.55 → 0) = (1.76 ± 0.15) × 10^-4 eV (E2) (1970WA08). See also (1970WA1N) and (1965PR1C, 1966GO1C; theor.).

Reaction (b), studied at E_e = 18, 24.5 and 30 MeV, shows resonances (assuming ground state transitions) at E_x = 11.42, 11.90, 12.74, 15.70 and 18.7 MeV in ¹⁹F (1962DO1A).

32. 19F(n, n)19F

Angular distributions have been reported at E_n = 2.56 MeV (1960DA08; γ_0.110, γ_0.197), 14.1 MeV (1970CL03; n₀₊₁₊₂, n₃₊₄₊₅) and 14.2 MeV (1966BO21; n₀₊₁₊₂, n₃₊₄₊₅, n₆ and n to ¹⁹F*(4.7, 5.4)). Gamma-ray energy measurements are reported by (1968SP01) and (1969WH1A): see Table 19.18 (in PDF or PS). Branching ratios are listed in Table 19.9 (in PDF or PS) (1968SP01). See also (1959BI1A, 1959KO60, 1960AN14, 1961RO01, 1966VE1B, 1971NI05) and (1963DO1C; theor.).

33. (a) 19F(p, p)19F
(b) 19F(p, 2p)18O	Qm = -7.993

Table 19.19 (in PDF or PS) displays energy levels of ¹⁹F derived from measurements of inelastically scattered protons and γ-rays (1956SQ1A, 1961VA28, 1962VA28, 1968GU07, 1969PO03). See also (1959AJ76). Angular distributions of various proton groups have been measured at E_p = 4.26, 5.96 and 6.87 MeV (1967TH06; p₀, p₁, p₂), 6.6 MeV (1961VA28, 1962VA28; p₂ → p₆), 6.78 to 7.41 MeV (1961KO08; p₃₊₄₊₅, p₆), 13.9 MeV (1966LU03; p₀, p₂, p₅) and 17.5 MeV (1968CR03; p₀, p₂ → p₇, p₈₊₉, p₁₀, p₁₁ and p to ¹⁹F*(5.43)). (1967TH06) report that the scattering below E_p = 7 MeV is adequately described as scattering from an axially symmetric quadrupole-deformed potential, and that only positive parity states are strongly excited. Branching ratios for observed transitions are shown in Table 19.9 (in PDF or PS) and lifetimes in Table 19.10 (in PDF or PS) (1969PO03, 1970LA02). (1969PO03) find a pronounced inhibition of the four E1 transitions involved in the decay of ¹⁹F*(1.35, 1.46, 1.55) in accord with the predictions of (1964HA21). Partial widths have been determined by (1969PO03). (1970LA02) have studied the decay of ¹⁹F*(1.46): from the angular distribution of the γ-rays, measurement of their linear polarization and from τ_m, |M|²(E2) = 14⁺²⁶_-8, |M|²(M1) = 0.10 ± 0.03 W.u. The mixing ratios in the γ-decay of ¹⁹F*(1.46) are -0.1 < δ_M2/E1 < 0.0 for 1.46 → 0.20, 0.30 < δ_E2/M1 < 0.38 for 1.46 → 0.11 and |δ_M2/E1| < 0.06 for 1.46 → 0. These results indicate that ¹⁹F*(1.46) cannot be explained as a p_1/2 proton hole coupled to the pure ground state rotational band (1971HA30). See also (PR63A) for other linear polarization data and (1965KL01, 1966RO03, 1966TH02, 1967HI1C, 1968HI1F) for other angular correlation work. See also (1964NE08).

Additional parameters measured for the 5/2⁺ state at 0.197 MeV are : Q = 0.11 ± 0.02 b (1964SU01: see also (1958SU58)), Q = -(0.10 ± 0.02) b (1968RI1N); μ = 3.69 ± 0.04 nm (1961FR07): [see also (1964BO40)]; τ_m=128 ± 2 nsec (1968KL05), 129.9 ± 2.3 nsec (1967BE14): see also Table 19.10 (in PDF or PS) for additional measurements of τ_m for this and for other ¹⁹F states (1963GA14, 1963VA01, 1963VA12, 1965BO28, 1969ME13, 1969PO03). See also (PR63A).

See also (1959TR1A, 1968JA1H) and (1967AM1D; theor.). For reaction (b) see the review of (1965RI1A). See also (1961PU1A, 1964GO1C) and (1966JA1A; theor.).

34. 19F(d, d)19F

Angular distributions of elastically scattered deuterons have been measured at E_d = 2.0 and 2.2 MeV (1968BI09), 2.6 to 4.0 MeV (1969ZA01) and at 15 MeV (1965DI1C, 1966DE09, 1970DE06). In addition, angular distributions have been measured at E_d = 15 MeV for five groups of inelastically scattered deuterons (1970DE06; d₁ → d₅). Analysis by DWBA leads to B(E2)(↓) = 9 ± 3 W.u. for the 0.197 → 0 transition and 10 ± 3 W.u. for the 1.56 → 0 transition, and to B(E3)(↓) = 1.4 ± 0.6 W.u. for the 1.35 → 0 transition (1970DE06). See also (1969VE09, 1970VE06; theor.).

35. 19F(t, t)19F

Angular distributions of elastically scattered tritons have been measured at E_t = 2 MeV (1969HE08) and at 7.2 MeV (1964PU01). See also (1968HO1C; theor.).

36. 19F(3He, 3He)19F

Angular distributions of elastically scattered ³He particles are reported at E(³He) = 4.0, 6.0 and 8.0 MeV (1966MA43), at 9 MeV (1965SI18), at 11.0 MeV (1970SC23) and at 29 MeV (1961CA19, 1962GA17). See also (1959BR72) and (1968HO1C; theor.). (1967CO1J) also report the excitation of ¹⁹F*(0.11).

37. (a) 19F(α, α)19F
(b) 19F(α, 2α)15N	Qm = -4.013

Angular distributions of elastically scattered α-particles have been measured at E_α = 19.9 to 23.3 MeV (1968AG1D, 1970AG08, 1970FE1E), and at 38 MeV (1960AG01). The energy of the γ-ray from the 1.35 → 0.11 transition is 1235.8 ± 0.2 keV. Using E_x = 109.893 ± 0.004 keV for the energy of the first excited state, E_x for ¹⁹F* is then 1345.7 ± 0.2 keV (1967WA13).

At E_α = 12.7 MeV, a state at 4.648 MeV is populated which is then observed to γ-decay to the 9/2⁺ state at 2.78 MeV. The angular distribution of the cascade γ-rays and the lifetime of ¹⁹F*(4.65), set J^π = 13/2⁺ for ¹⁹F*(4.65) (1969JA09). For a listing of the τ_m for this state and ¹⁹F*(1.35, 2.78) see Table 19.10 (in PDF or PS) (1968PA11, 1968RO07, 1969JA09, 1969JO10). See also (1958CA97, 1959BR72, 1963FR12, 1964FR03, 1970BL1F). For reaction (b) see (1963LA02).

38. (a) 19F(6Li, 6Li)19F

(b) 19F(7Li, 7Li)19F

Elastic scattering angular distributions have been reported for both reactions at E(Li) = 20 MeV (1969BE90). See also (1959LI55).

39. (a) 19F(10B, 10B)19F

(b) 19F(12C, 12C)19F

For reaction (a) see (1971KN05). For reaction (b), see reaction 4.

40. 19F(14N, 14N)19F

B(E2)(↑), from the Coulomb excitation of ¹⁹F*(1.55) = 2.44 × 10^-51 e²⋅cm⁴ (1966AF01). See also (1956AL1D, 1956AL36, 1956AL55).

41. 19F(20Ne, 20Ne)19F

B(E1)(↑), from the Coulomb excitation of ¹⁹F*(0.110) = 6.3 × 10^-30 e²⋅cm²; B(E2)(↑) for ¹⁹F*(0.197) = 5 × 10^-51 e²⋅cm⁴. Reported mean lifetimes for these states are displayed in Table 19.10 (in PDF or PS) (1960ST17, 1962RI09).

42. 19Ne(β+)19F

Qm = 3.238

See ¹⁹Ne.

43. 20Ne(γ, p)19F

Qm = -12.845

See (1962DO1A, 1963FI07, 1969HO16). See also (1962NU1A) and ²⁰Ne.

44. 20Ne(p, pα)19F †

Qm = -12.845

See (1967CH04).

45. 20Ne(n, d)19F

Qm = -10.621

See (1960VE06).

46. 20Ne(d, 3He)19F

Qm = -7.351

At E_d = 52 MeV, ³He groups are observed, and angular distributions are reported, corresponding to states at E_x = 0.15 ± 0.04, 1.51 ± 0.03, 2.83 ± 0.04 (l = 4), 3.99 ± 0.07, 4.56 ± 0.02 (l = 1), 5.44 ± 0.05, 5.69 ± 0.07 (l = 1), 6.10 ± 0.03, 6.78 ± 0.02 (l = 1) and 10.42 ± 0.15 MeV (1970KA31). See also (1971DU12; theor.).

47. 20Ne(t, α)19F

Qm = 6.969

At E_t = 2.6 MeV, alpha groups are observed to states with 2.7 < E_x < 6.6 MeV: see Table 19.20 (in PDF or PS) (1961SI03). The lifetime, τ_m, of ¹⁹F*(4.65), J^π = 13/2⁺ [K^π = 1/2⁺ rotational band] is 2.3 ± 0.5 psec (see also Table 19.10 (in PDF or PS)): the E2 strength of the transition to ¹⁹F*(2.78) is 5.0 ± 1.1 W.u. (1969BH01).

48. 21Ne(n, t)19F

Qm = -11.124

Not reported.

49. 21Ne(p, 3He)19F

Qm = -11.888

At E_p = 45 MeV, ³He groups are observed to some T = 1/2 states in ¹⁹F and to the J^π = 3/2⁺; T = 3/2 analog of ¹⁹O*(0.095): E_x = 7.660 ± 0.035 MeV (1969HA38): see also reaction 12 in ¹⁹Ne.

50. 21Ne(d, α)19F

Qm = 6.465

Alpha-particle groups have been observed to ¹⁹F* = 0, 113 ± 8 and 192 ± 12 keV (1952MI54).

51. 22Ne(p, α)19F

Qm = -1.675

Not reported.

52. 23Na(n, n'α)19F

Qm = -10.468

See (1966WO03).