A=19F (1983AJ01)

3. (a) ¹²C(⁷Li, γ)¹⁹F Q_m = 16.396
(b) ¹²C(⁷Li, n)¹⁸F Q_m = 5.964 E_b = 16.396
(c) ¹²C(⁷Li, p)¹⁸O Q_m = 8.402
(d) ¹²C(⁷Li, d)¹⁷O Q_m = 2.582
(e) ¹²C(⁷Li, t)¹⁶O Q_m = 4.695
(f) ¹²C(⁷Li, α)¹⁵N Q_m = 12.3817
(g) ¹²C(⁷Li, ⁷Li)¹²C

For reaction (a) see (1978AJ03). The yield of ¹⁸F [reaction (b)] has been determined for E(⁷Li) = 2.5 to 3.5 MeV (1961NO05). The cross sections for reaction (c), (d), (e) and (f) vary strongly over the range E(⁷Li) = 4 to 14 MeV but with little, if any, cross correlation. Strong fluctuations continue to E(⁷Li) = 25 MeV and there is some evidence of structures at higher energies: for a listing of the earlier references see (1978AJ03). The excitation functions for several groups in ¹⁶O have been studied for E(¹²C) = 54 to 62 MeV, as has the total cross section (for residues of A > 8) for E(⁷Li) = 10 to 38 MeV (1981DE15). See (1976PO02, 1978DR07) for reaction (g). See also (1981XE01; theor.), ¹⁸O here, ¹⁶O and ¹⁷O in (1982AJ01), ¹⁵N in (1981AJ01) and ¹²C in (1980AJ01).

4. ¹²C(⁹Be, d)¹⁹F Q_m = -0.3005

At E(⁹Be) = 12 - 27 MeV angular distributions are reported to ¹⁹F*(2.78) and to several unresolved groups (1979JA22, 1981JA09). The excitation function for ¹⁹F*(2.78) has been measured for E(⁹Be) = 10.5 to 25.9 MeV (1980HU1E).

5. ¹²C(¹¹B, α)¹⁹F Q_m = 7.7303

At E(¹¹B) = 18.0 to 34.1 MeV excitation functions are reported for the transitions to ¹⁹F*(0 + 0.11 + 0.20, 1.35 + 1.46 + 1.56, 2.78) (1979FR05).

6. ¹²C(¹²C, αp)¹⁹F Q_m = -8.2266

For the yield of ¹⁹F for E(¹²C) = 24 to 62 MeV see (1980KO02).

7. ¹²C(¹⁴N, ⁷Be)¹⁹F Q_m = -11.419

Angular distributions are reported at E(¹⁴N) = 78.8 MeV for the transitions to ¹⁹F*(0 + 0.11 + 0.20, 1.35 + 1.46 + 1.55, 2.78) (1977MO1A, 1979MO14).

8. ¹²C(²⁰Ne, ¹³N)¹⁹F Q_m = -10.901

See (1979OR01).

9. (a) ¹³C(⁶Li, t)¹⁶O Q_m = 6.9994 E_b = 18.6997
(b) ¹³C(⁶Li, α)¹⁵N Q_m = 14.6859
(c) ¹³C(⁶Li, ⁶Li)¹³C

Excitation functions for tritons to a number of states of ¹⁶O have been measured for E(⁶Li) = 20 to 32 MeV [correlated structures are not observed (1980CU03)] and 24 to 26 MeV (1982AB02). Excitation functions for α₀ have been measured for E(⁶Li) = 7.7 to 16.8 MeV: structures are observed but they are not correlated (1974CO13). For reaction (c) see (1976PO02, 1978DR07). For fusion cross sections see (1981DEZE, 1981DEZW). See also (1981ME1F; theor.).

10. ¹³C(⁹Be, t)¹⁹F Q_m = 1.0105

Angular distributions have been studied at E(¹³C) = 27.9 MeV to ¹⁹F*(0 + 0.11 + 0.20, 2.78) (1980BO21).

11. (a) ¹⁴N(⁶Li, p)¹⁹F Q_m = 11.1491
(b) ¹⁴N(⁷Li, d)¹⁹F Q_m = 6.123

See (1978AJ03).

12. ¹⁴N(¹⁰B, αp)¹⁹F Q_m = 6.6886

Cross sections have been measured for E(¹⁴N) = 7 to 18 MeV (1978WU1C).

13. ¹⁵N(α, γ)¹⁹F Q_m = 4.0138

Resonances in the yield of γ-rays are observed below E_α = 10.4 MeV: the parameters for these are displayed in Table 19.9 (in PDF or PS). Branching ratios are shown in Table 19.7 (in PDF or PS) and τ_m measurements (1977DI18, 1980AN02) in Table 19.8 (in PDF or PS). The J^π values are shown in Table 19.9 (in PDF or PS) are based on correlation and angular distribution measurements and on branching ratio determinations.

The E_x of states involved in cascade decays are 4377 ± 1 and 4548 ± 2 keV (1976RO07), 3999.6 ± 1.2 and 4031.9 ± 0.4 keV (1973RO09). The K^π = 1/2⁺ band involves ¹⁹F*(0.110 [1/2^-], 1.46 [3/2^-], 1.35 [5/2^-], 4.00 [7/2^-], 4.03 [9/2^-], 7.16 [11/2^-]) (1973RO09) and possibly ¹⁹F*(8.29 [13/2^-]) (1974UN01) [J^π in brackets]. The situation concerning the other bands is not clear: see (1972AJ02) for a discussion of the evidence for other assignments of J^π and K^π. ¹⁹F*(10.41) is likely to be the second 13/2⁺ (2s, 1d)³ state in ¹⁹F (1976SY01, 1978SY01). See also (1978TA1U; astrophys.).

14. (a) ¹⁵N(α, p)¹⁸O Q_m = -3.9796 E_b = 4.0138
(b) ¹⁵N(α, α)¹⁵N

Resonances observed in the (α, α'γ) and (α, pγ) reactions (1978SY01) and in the elastic scattering (reaction (b)) [see (1978AJ03) for references] are displayed in Table 19.10 (in PDF or PS). The elastic excitation function has been measured for E_α = 16 to 23.7 MeV by (1977FE08). See also (1979LE18; theor.).

15. ¹⁵N(⁷Li, t)¹⁹F Q_m = 1.547

This reaction has been studied at E(⁷Li) = 40 MeV: see Table 19.11 (in PDF or PS) (1979MA26). See also (1978AJ03).

16. ¹⁵N(¹¹B, ⁷Li)¹⁹F Q_m = -4.6514

At E(¹¹B) = 115 MeV, ¹⁹F*(8.29, 8.96) [J^π = 13/2^-, 11/2^-, respectively] are populated as are states at 10.4 ± 0.05, 12.26 ± 0.07, 12.67 ± 0.08, 14.9 ± 0.09, 15.4 ± 0.09, 17.4 ± 0.08, 18.6 ± 0.08 and 19.7 ± 0.08 MeV (1979BR04).

17. ¹⁵N(¹³C, ⁹Be)¹⁹F Q_m = -6.6341

At E(¹³C) = 105 MeV, ¹⁹F*(4.02, 8.29, 8.95, 12.26 ± 0.1, 12.65 ± 0.1, 14.8 ± 0.12) are strongly populated. ¹⁹F*(2.78) is also observed. It is suggested that ¹⁹F*(8.29, 8.95, 12.26, 12.65) have J^π = 13/2^-, 11/2^-, (17/2^-), (15/2^-), respectively, and that ¹⁹F*(12.26, 12.66) are members of the 2N + L = 8 α-cluster band in ¹⁹F (1979BR04). See also (1977FO1E).

18. (a) ¹⁶O(t, γ)¹⁹F Q_m = 11.7003
(b) ¹⁶O(t, n)¹⁸F Q_m = 1.2690 E_b = 11.7003
(c) ¹⁶O(t, p)¹⁸O Q_m = 3.7069
(d) ¹⁶O(t, t)¹⁶O
(e) ¹⁶O(t, α)¹⁵N Q_m = 7.6865

For reaction (a) see (1978AJ03). The excitation function for reaction (b) has been measured for E_t = 0.3 to 3.7 MeV: there is evidence for a maximum at E_t = 2.5 MeV. For resonances in the yields of p₀, p₁, α₀, α₁₊₂, see (1978AJ03). The elastic yield [reaction (d)] shows a large number of resonances: their parameters are displayed in Table 19.12 (in PDF or PS). See also (1977CI1D), (1981AO01; theor.) and ¹⁸O here.

19. ¹⁶O(α, p)¹⁹F Q_m = -8.1137

Angular distributions have been measured at E_α = 20.1 to 40 MeV [see (1978AJ03)] and at E_α = 40 MeV (1979VA08: to ¹⁹F*(0 + 0.20, 2.78, 4.65): the 3p 13/2⁺ strength is split between ¹⁹F*(4.65, 10.42). States observed in this reaction are displayed in Table 19.12 (in PDF or PS) of (1978AJ03).

20. ¹⁶O(⁶Li, ³He)¹⁹F Q_m = -4.094

This reaction (and its mirror reaction ¹⁶O(⁶Li, t)¹⁹Ne [see reaction 7 in ¹⁹Ne]) have been studied at E(⁶Li) = 24 MeV [see (1978AJ03)] and at 46 MeV (1979MA26). Members of the K^π = 1/2⁺ and 1/2^- rotational bands have been identified: see Table 19.13 (in PDF or PS). In addition ³He groups are reported to states with E_x = 6.10, 6.92, 7.25, 8.29, 8.96, 9.7, 9.88, 10.4 [all ± 0.015], to unresolved states near 11.5, 12.7 and to states at E_x = 13.76, 14.10, 15.00, 15.56 and 18.92 [± 0.03] MeV (1979MA26). See also (1977FO1E).

21. ¹⁶O(⁷Li, α)¹⁹F Q_m = 9.234

Many states have been populated in this reaction: see Table 19.14 (in PDF or PS) in (1978AJ03). See also (1977FO1E).

22. ¹⁶O(¹⁰B, ⁷Be)¹⁹F Q_m = -6.968

This reaction, as well as the analog reaction [¹⁶O(¹⁰B, ⁷Li)¹⁹Ne] have been studied at E(¹⁰B) = 100 MeV: an attempt is made to match analog states [see reaction 8 in ¹⁹Ne] but problems of energy resolution are evident (1976HA06). See also (1977FO1E).

23. ¹⁶O(¹¹B, ⁸Be)¹⁹F Q_m = 0.4765

The angular distribution for the transition to ⁸Be_g.s. + ¹⁹F_g.s. has been measured at E(¹⁶O) = 60 MeV (1972SC17).

24. (a) ¹⁶O(¹²C, 2αp)¹⁹F Q_m = -15.3886
(b) ¹⁶O(¹³C, ¹⁰B)¹⁹F Q_m = -12.1763

For reaction (a) see (1978CH15). At E(¹³C) = 105 MeV ¹⁹F*(2.78, 4.68) are preferentially populated (1979GO17, 1979RA10).

25. (a) ¹⁷O(d, n)¹⁸F Q_m = 3.382 E_b = 13.813
(b) ¹⁷O(d, p)¹⁸O Q_m = 5.8199
(c) ¹⁷O(d, t)¹⁶O Q_m = 2.1130
(d) ¹⁷O(d, ³He)¹⁶N Q_m = -8.287
(e) ¹⁷O(d, α)¹⁵N Q_m = 9.7995

For reaction (a) see ¹⁸F in (1972AJ02); for reaction (b) see ¹⁸O; for reaction (e) see ¹⁵N in (1970AJ04). At E_d-bar = 52 MeV polarization measurements are reported involving the groups to ¹⁶O*(6.13, 8.87, 19.19) and ¹⁶N*(0, 0.297, 6.17 + 6.36) (1981MA1E). See also ¹⁶N and ¹⁶O in (1982AJ01).

26. ¹⁷O(³He, p)¹⁹F Q_m = 8.320

States studied in this reaction at E(³He) = 18 MeV are displayed in Table 19.14 (in PDF or PS).

27. ¹⁷O(α, d)¹⁹F Q_m = -10.033

At E_α = 47.5 MeV angular distributions have been studied to the 1/2⁺ → 9/2⁺ and the 13/2⁺ members of the K = 1/2⁺ band [¹⁹F*(0, 0.197, 1.55, 2.78, 4.65, 5.47)], to two 11/2⁺ states ¹⁹F*(6.49, 7.94) [both of which are strongly populated] and to the 7/2⁺ state at 4.38 MeV. The reaction populates strongly only those positive-parity states that predominantly (sd)³ (1978FO11, 1975FO07).

28. ¹⁷O(¹³C, ¹¹B)¹⁹F Q_m = -4.865

See (1977CH22).

29. ¹⁸O(p, γ)¹⁹F Q_m = 7.9934

This reaction has recently been studied for E_p = 80 to 2200 keV by (1980WI17). A large number of resonances have been investigated and E_res, total and partial widths, branching and mixing ratios and ωγ values are reported. Transition strength arguments as well as analyses of γ-ray angular distrubution data lead to J^π assignments: see Tables 19.7 (in PDF or PS), 19.15 (in PDF or PS) and 19.16 (in PDF or PS) for a display of the results (1980WI17).

In addition absolute cross sections measured for direct capture leads to C²S values for a number of states of ¹⁹F. Reduced widths and J^π determinations lead to (1980WI17) to postulate ¹⁹F*(3.91, 4.55, 4.38, 6.59, 6.50, 10.43) as the J^π = 3/2⁺, 5/2⁺, 7/2⁺, 9/2⁺, 11/2⁺, 13/2⁺ of the K^π = 3/2⁺ rotational band; ¹⁹F*(7.73 or 7.26, 6.09, 9.81, 6.92, 9.87) as the J^π = 1/2^-, 3/2^-, 5/2^-, 7/2^- and 11/2^- members of the excited K^π = 1/2^- rotational band; and ¹⁹F*(4.56, 4.68, 5.42, 6.10, 7.17) as the J^π = 3/2^-, 5/2^-, 7/2^-, 9/2^- and 11/2^- members of the K^π = 3/2^- rotational band. The direct capture transition to ¹⁹F*(7.54) indicates some isospin mixing in this 5/2⁺, first T = 3/2 state in ¹⁹F (1980WI17).

Stellar reaction rates have also been calculated: the data cover T₉ = 0.01 - 5.0. The consequences for the final termination of the CNO tri-cycle are discussed (1980WI17). See also (1975ZI1A; astrophys.). For the earlier work see (1978AJ03). See also (1978DI13).

30. ¹⁸O(p, n)¹⁸F Q_m = -2.4379 E_b = 7.9934

Yield measurements are reported from E_p = 2.5 to 13.5 MeV [see (1978AJ03) for the references]. Table 19.17 (in PDF or PS) displays the observed resonances. See also ¹⁸F.

31. ¹⁸O(p, p)¹⁸O E_b = 7.9934

Scattering studies have been carried out for E_p = 0.6 to 16.3 MeV [see (1978AJ03)], and for E_p = 3.05 to 3.5 MeV (1978DI13; p₁γ) and E_{pol. p} = 6.1 to 16.6 MeV (1979MU05; p₀, p₁). Pronounced resonant structure is evident up to E_{pol. p} = 14 MeV (1979MU05). Observed resonances are displayed in Table 19.18 (in PDF or PS). For other polarization measurements see (1981GL1B; E_{pol. p} = 800 MeV) and (1978AJ03). See also (1980FA06) and ¹⁸O.

32. (a) ¹⁸O(p, d)¹⁷O Q_m = -5.820 E_b = 7.9934
(b) ¹⁸O(p, t)¹⁶O Q_m = -3.7069

See (1978AJ03) and ¹⁶O, ¹⁷O in (1982AJ01). See also (1979AM03; theor.).

33. ¹⁸O(p, α)¹⁵N Q_m = 3.9796 E_b = 7.9934

Yield measurements have been studied for E_p = 0.50 to 14 MeV [see (1972AJ02)] and at E_p = 72 to 935 keV (1979LO01; α₀), 235 to 698 keV (1978MA30; α₀) and 6.6 to 10.4 MeV (1979WI09; α₀): observed resonances are displayed in Table 19.18 (in PDF or PS). The stellar reaction rates have been determined for T₉ = 0.008 to 2.5 (1978RO1D). See also (1975ZI1A, 1978MA30; astrophys.) and (1978AJ03).

34. (a) ¹⁸O(d, n)¹⁹F Q_m = 5.7685
(b) ¹⁸O(d, nα)¹⁵N Q_m = 1.7546

Angular distributions of neutron groups corresponding to ¹⁹F states with E_x < 8.2 MeV have been measured at E_d = 3 and 4 MeV: see Table 19.18 (in PDF or PS) in (1978AJ03). Gamma-ray measurements are reported here in Table 19.19 (in PDF or PS) and τ_m measurements in Table 19.8 (in PDF or PS). For reaction (b) see (1972AJ02).

35. ¹⁸O(³He, d)¹⁹F Q_m = 2.4998

Angular distributions of the deuterons corresponding to many states of ¹⁹F have been analyzed by DWBA: the results are shown in Table 19.19 (in PDF or PS). The spectroscopic factors obtained 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 (1979HAYZ) and (1978AJ03).

36. ¹⁹O(β^-)¹⁹F Q_m = 4.819

The decay is primarily by allowed transitions to ¹⁹F*(0.197, 1.55), J^π = 5/2⁺, 3/2⁺. Very weak branches are also observed to ¹⁹F*(0.11, 1.35, 3.91, 4.39), J^π = 1/2^-, 5/2^-, 3/2⁺, 7/2⁺: see Table 19.20 (in PDF or PS). 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 19.7 (in PDF or PS).

Time differential β-γ angular correlation measurements lead to a ratio +0.030 ± 0.015 for the Fermi to Gamow-Teller matrix elements (C_VM_F/C_AM_GT) for the allowed β^- decay (5/2⁺ → 5/2⁺) from ¹⁹O_g.s. to ¹⁹F_0.197. This leads to a value for M_F (isospin-forbidden Fermi matrix element) of (4.7 ± 2.4) × 10^-3. The admixture of the analog of the ¹⁹O_g.s. in the ¹⁹F excited state α = (2.7 ± 1.4) × 10^-3 and the effective charge-dependent matrix element |H_CD| = 20 ± 10 keV (1978PE14).

37. (a) ¹⁹F(γ, n)¹⁸F Q_m = -10.4313
(b) ¹⁹F(γ, 2n)¹⁷F Q_m = -19.5819
(c) ¹⁹F(γ, 2np)¹⁶O Q_m = -20.1823

The cross section for (γ, Tn) has been measured for E_γ = 10.5 to 28 MeV: it shows a clear resonance at E_γ ~ 12 MeV and unresolved structures at higher energies. The integrated cross section to 29 MeV is 108 ± 7 MeV · mb (1974VE06). For reports of other structures see (1972AJ02, 1978AJ03). See also (1979TH05) and ¹⁸F. For reactions (b) and (c) see (1978AJ03).

38. ¹⁹F(γ, p)¹⁸O Q_m = -7.9934

The integrated cross sections for the p₀ and p₁ processes at 90° for E_γ = 13.3 → 25.4 and 15.2 → 26.0 MeV are, respectively, 1.80 ± 0.27 and 0.50 ± 0.45 MeV · mb/sr. The (γ, p₀) cross section at 90° shows broad structures at E_γ = 15.0, 17.0 and 23 MeV (1975TS03). For a report of other structures see (1978AJ03). See also (1979KE1B, 1979TH05) and ¹⁸O.

39. ¹⁹F(γ, t)¹⁶O Q_m = -11.7003

This reaction has been studied for the transition to ¹⁶O_g.s. for E_γ = 18 to 23 MeV. Two peaks are observed at E_γ = 18.8 and 20.1 MeV: the angular distribution of t₀ indicates J^π = 1/2^- or 3/2^-, T = 1/2. The triton GDR contributes ~ 1% or the total GDR (1974SK04).

40. ¹⁹F(γ, α)¹⁵N Q_m = -4.0138

See (1979TH05) and ¹⁵N in (1981AJ01).

41. 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. ¹⁹F*(1.46, 3.91, 7.66) are also excited. E_x = 7663 ± 4 keV for the latter. The scattering cross section is relatively small and structureless for E_γ = 14 to 30 MeV. See (1978AJ03) for references.

42. (a) ¹⁹F(e, e)¹⁹F
(b) ¹⁹F(e, en)¹⁸F Q_m = -10.4313
(c) ¹⁹F(e, ep)¹⁸O Q_m = -7.9934

The rms radius of ¹⁹F = 2.885 ± 0.015 fm (1973HA13). At E_e = 400 MeV, 0.5 ≤ q ≤ 2.5 fm^-1, the squared form factors have been determined for ¹⁹F*(0, 1.55, 0.197, 5.46, 2.78, 4.65) [the J^π = 1/2⁺, 3/2⁺, 5/2⁺, 7/2⁺, 9/2⁺, 13/2⁺ members of the K = 1/2⁺ ground-state rotational band] as well as for ¹⁹F*(4.38) [J^π = 7/2⁺]. The data are consistent for q < 1.8 fm^-1 with transition strengths which were derived from a variation-after-projection, Hartree-Fock approximation (VPHF). However for the transitions to ¹⁹F*(1.55, 0.197) (q > 1.8 fm^-1) the relative magnitudes of the transitions require a strong M3 component in the 5/2⁺ state and a weak component in the 3/2⁺ state, consistent with predominant L · S coupling. Including M5 and M7 strength improves the agreement with the data for ¹⁹F*(2.78, 4.65) (1978WI01). The deformation parameters for the ground-state band are β₂ = 0.43 ± 0.02, β₄ = 0.12 ± 0.02 (1975OY01). Values of |M|² adotped by P.M. Endt (private communication) are 8.9 ± 0.5 (E3), 6.9 ± 0.5 (E2) and 6.1 ± 2.4 W.u. (M5) for the g.s. transitions of ¹⁹F*(1.35, 1.55, 2.78): for other values see Table 19.20 (in PDF or PS) in (1978AJ03). For reactions (b) and (c) see (1978AJ03).

43. ¹⁹F(n, n)¹⁹F

Angular distributions of neutron groups have been reported at E_n = 2.6, 14.1 and 14.2 MeV: see (1972AJ02). E_x for the first six excited states of ¹⁹F, derived from γ-ray measurements, are 109.8 ± 0.2, 197.2 ± 0.2, 1345.4 ± 0.3, 1456.9 ± 1.1, 1554.0 ± 0.3 and 2775.1 ± 3.5 keV (1968SP01). See also (1978CO18, 1980CO1U), (1978AJ03), (1977NO07; theor.) and ²⁰F here.

44. (a) ¹⁹F(p, p)¹⁹F
(b) ¹⁹F(p, 2p)¹⁸O Q_m = -7.9934

Table 19.21 (in PDF or PS) displays energy levels of ¹⁹F derived from this reaction. Angular distributions of various proton groups have been measured from E_p = 4.3 to 30 MeV [see (1978AJ03)] and at 35.2 MeV (1980FA07; p₀). The ground-state rotational band is characterized by β₂ = 0.44 ± 0.04, β₄ = 0.14 ± 0.04 (1973DE06, 1974DE46). The g of ¹⁹F*(0.197) = 1.47 ± 0.03 (1978KR05). The mixing ratio for the 1.46 → 0.11 transition (3/2^- → 1/2^-; K = 1/2^- band), δ(E2/M1) has been remeasured by (1980DI12) to be 0.224 ± 0.040. A re-analysis of earlier experiments leads to a "best" value of 0.248 ± 0.020 for the ratio and to an E2 strength of 18.7 ± 1.9 W.u. The 1.46 → 0 transition is pure E1 (δ = 0.01 ± 0.03) (1980DI12). See Table 2 in the Introduction in this publication, and Table 19.7 (in PDF or PS). For reaction (b) see ¹⁸O. See also (1981KE1E, 1982FI1C), (1978SH1U, 1980KR1C; applied), (1977PH02, 1979ZE04, 1980KO1V; theor.) and ²⁰Ne.

45. ¹⁹F(d, d)¹⁹F

Angular distributions of elastically scattered deuterons has been measured for E_d = 2.0 to 15 MeV [see (1972AJ02)] for the earlier references] and for 1.6 to 2.4 MeV (1978AS07). Angular distributions have also been measured for d₁ → d₅ and B(Eλ) have been derived (1970DE06; E_d = 15 MeV). For polarization measurements see (1978AJ03). See also (1979AN35).

46. ¹⁹F(t, t)¹⁹F

Elastic angular distributions have been measured at E_t = 2 and 7.2 MeV: see (1972AJ02).

47. (a) ¹⁹F(³He, ³He)¹⁹F
(b) ¹⁹F(³He, ⁶He)¹⁶F Q_m = -14.842

Elastic angular distributions have been measured for E(³He) = 4.0 to 29 MeV: see (1972AJ02, 1978AJ03). For reaction (b) see (1978AJ03) and ¹⁶F in (1982AJ01). See also (1979GR11; theor.).

48. (a) ¹⁹F(α, α)¹⁹F
(b) ¹⁹F(α, αp)¹⁸O Q_m = -7.9934
(c) ¹⁹F(α, 2α)¹⁵N Q_m = -4.0138
(d) ¹⁹F(α, αt)¹⁶O Q_m = -11.7003

Angular distributions of elastically scattered α-particles have been measured at E_α = 19.9 to 23.3 MeV and at 38 MeV [see (1972AJ02)]. Many inelastic groups have also been studied: see Table 19.22 (in PDF or PS) in (1978AJ03).

The energy of the γ-ray from 1.35 → 0.11 transition is 1235.8 ± 0.2 keV. Using E_x = 109.894 ± 0.005 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 reaction (b) see ¹⁸O (1979NA06). For reactions (c) and (d) see (1972CH18; E_α = 60.2 MeV).

49. (a) ¹⁹F(⁶Li, ⁶Li)¹⁹F
(b) ¹⁹F(⁷Li, ⁷Li)¹⁹F

Elastic angular distributions have been reported in both reactions at E(Li) = 20 and 34 MeV: see (1978AJ03).

50. (a) ¹⁹F(¹⁰B, ¹⁰B)¹⁹F
(b) ¹⁹F(¹²C, ¹²C)¹⁹F

For reaction (a) see (1971KN05). Angular distributions [reaction (b)] involving ¹⁹F*(0, 0.197, 1.55) have been studied at E(¹²C) = 40.6 MeV (1980KA1T). See also (1978AJ03). Fusion cross section measurements are reported by (1976SP07, 1977KO38, 1979KO20). See also (1980CO08, 1981MAZJ) and (1978BI1G, 1978HO13, 1978VA1A, 1979NA03, 1980LO02; theor.).

51. (a) ¹⁹F(¹⁴N, ¹⁴N)¹⁹F
(b) ¹⁹F(¹⁵N, ¹⁵N)¹⁹F

Elastic scattering angular distributions have been studied at E(¹⁴N) = 19.5 MeV (1977KU06) and at E(¹⁵N) = 23, 26 and 29 MeV (1973GA14).

52. (a) ¹⁹F(¹⁶O, ¹⁶O)¹⁹F
(b) ¹⁹F(¹⁸O, ¹⁸O)¹⁹F

Elastic angular distributions have been studied at E(¹⁶O) = 21.4 and 25.8 MeV and at E(¹⁹F) = 27, 30, 33 and 36 MeV (reaction (a)) [also to ¹⁹F*(1.46) at the two higher energies] and at 27, 30 and 33 MeV [reaction (b)]: see (1978AJ03). See also (1979GAZV) and (1980OH05; theor.).

53. ¹⁹F(²⁰Ne, ²⁰Ne)¹⁹F

See (1972AJ02) and (1979SI1K; theor.).

54. ¹⁹F(²³Na, ²³Na)¹⁹F

For fusion cross sections see (1978HO20). See also (1978HO13, 1980LE11; theor.).

55. ¹⁹F(²⁴Mg, ²⁴Mg)¹⁹F

For fusion cross sections see (1981LE04).

56. ¹⁹F(²⁷Al, ²⁷Al)¹⁹F

For fusion measurements see (1981CH32). See also (1980SA1L).

57. (a) ¹⁹F(²⁸Si, ²⁸Si)¹⁹FF
(b) ¹⁹F(³⁰Si, ³⁰Si)¹⁹F

See (1980KU04) for the leastic scattering at E(Si) = 60 MeV. For fusion measurements see (1981CH32). See also (1979GO13; theor.).

58. ¹⁹Ne(β⁺)¹⁹F Q_m = 3.2383

See ¹⁹Ne.

59. ²⁰Ne(γ, p)¹⁹F Q_m = -12.8447

See (1972AJ02).

60. ²⁰Ne(n, d)¹⁹F Q_m = -10.6200

See (1978AJ03).

61. ²⁰Ne(d, ³He)¹⁹F Q_m = -7.3515

At E_d = 52 MeV ³He angular distributions are reported corresponding to some unresolved states in ¹⁹F and to ¹⁹F*(2.78, 5.62, 10.41) [the first two involve l = 4 and l = 1]: see (1978AJ03).

62. ²⁰Ne(t, α)¹⁹F Q_m = 6.9694

See Table 19.22 (in PDF or PS).

63. ²¹Ne(p, ³He)¹⁹F Q_m = -11.888

At E_p = 45 MeV, ³He groups are observed to some T = 1/2 states in ¹⁹F and to 3/2⁺, T = 3/2 analog of ¹⁹O*(0.095): E_x = 7.660 ± 0.035 MeV (1969HA38). At E_p = 40 MeV comparison of the ground-state angular distributions in this reaction and in the mirror (p, t) reaction [see reaction 18 in ¹⁹Ne] shows a suppression of the S = 1, T = 0 component of the (p, ³He) cross section: this is observed to occur for all T_Z = 1/2 nuclei with A < 40 (1976NA18).

64. ²¹Ne(d, α)¹⁹F Q_m = 6.465

See (1978AJ03).

65. ²²Ne(p, α)¹⁹F Q_m = -1.675

The parity-non-conserving asymmetry of the 110 keV γ-rays emitted by polarized ¹⁹F* nuclei is δ = -(1.8 ± 0.9) × 10^-4 (1975AD01). See also (1978AJ03).

66. ²³Na(n, n'α)¹⁹F Q_m = -10.467

See (1978AJ03).