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GENERAL: See 3 [Electromagnetic Transitions in A = 18-19] (in PDF or PS), 19.1 [General Table] (in PDF or PS), 19.2 [Table of Energy Levels] (in PDF or PS) and 19.3 [Radiative decays in ¹⁹Ne] (in PDF or PS).

1. 19O(β-)19F

Qm = 4.819

The weighted mean of several half-lives is 26.96 ± 0.07 s: see (1972AJ02, 1987AJ02). The decay is complex: see reaction 34 of ¹⁹F and 19.23 (in PDF or PS) and 19.24 (in PDF or PS).

2. 9Be(18O, 8Be)19O

Qm = 2.293

See (1983AJ01).

3. 13C(7Li, p)19O

Qm = 7.412

States of ¹⁹O reported in this reaction are displayed in 19.4 (in PDF or PS).

4. 17O(t, p)19O

Qm = 3.520

Proton groups corresponding to ¹⁹O states with E_x ≤ 5.6 MeV and E_γ measurements are displayed in 19.5 (in PDF or PS).

5. (a) 18O(n, γ)19O	Qm = 3.957
(b) 18O(n, n')18O		Eb = 3.957

The thermal capture cross section is 0.16 ± 0.01 mb (1981MUZQ). The scattering length b = 5.84 ± 0.07 fm, σ_free = 3.86 ± 0.10 b (1979KO26). The total cross section has been measured for E_n = 0.14 to 2.47 MeV [see (1978AJ03)] and at E_n = 5 to 7.5 MeV [G. Auchampaugh, quoted in (1986KO10)]. A multi-level R-matrix analysis of these and additional σ(θ) data leads to the states shown in 19.6 (in PDF or PS) and to some additional structures. The five 7/2^- states [¹⁹O*(6.27, 9.64, 9.84, 10.21, 10.66)] (see, however, footnote (a) to 19.6 (in PDF or PS)) contain about 20 - 30% of the allowed f_7/2 single-particle strength. See also the compilation of neutron cross sections in (1988MCZT). Isobaric analog assignments are presented (1986KO10). See also (1982RA1A) and see the astrophysical discussion in (1988AP1A, 1988MA1U).

6. 18O(n, α)15C

Qm = -5.009

Eb = 3.957

The total cross sections for the α₀ and α₁ groups have been measured for E_n = 7.5 to 8.6 MeV: resonance structure is reported at E_n = 7.70 ± 0.05 and 8.05 ± 0.05 MeV with Γ_lab = 0.25 and 0.35 MeV, respectively [¹⁹O*(11.25, 11.58)]: see (1978AJ03).

7. 18O(d, p)19O

Qm = 1.733

Angular distributions have been measured at E_d = 0.8 to 15 MeV: see (1978AJ03, 1983AJ01). The l_n values and spectroscopic factors derived from these measurements are displayed in 19.5 (in PDF or PS). Branching ratios are shown in 19.3 (in PDF or PS). ¹⁹O*(0.096) has g = -0.48 ± 0.06; its configuration appears to be mainly d³_5/2, and B(M1) = 0.040 ± 0.015 μ²_N. The ΔE value for the 1.47 → 0.096 transition is 1375.3 ± 0.5 keV. Assuming E_f = 96.0 ± 0.5 keV ( 19.2 (in PDF or PS)), E_i = 1471.4 ± 0.7 keV. Angular correlations are consistent with J^π = 5/2⁺ for the ground state and unambiguously fix J^π = 3/2⁺ and 1/2⁺, respectively, for ¹⁹O*(0.096, 1.47): see (1978AJ03) for references. See also (1986SE1B).

8. 18O(α, 3He)19O

Qm = -16.620

Differential cross sections were measured at E_α = 65 MeV and analyzed with DWBA calculations (1992YA08). See 19.7 (in PDF or PS).

9. 19N(β-)19O

Qm = 12.528

Many measurements of the half-life have been reported (see ¹⁹N) and a value of 0.304 ± 0.016 s has been adopted. A neutron emission probability of 33⁺34_-11% (1988MU08) and 62.4 ± 2.6% (1991RE02) has been measured. Shell model predictions for the ¹⁹N(β^-)¹⁹O decay are discussed in (1988WA17), and a β^- delayed γ decay scheme for ¹⁹O based on measurements of (1986DU07) (E_γ = 96.0 ± 1.0, 709.2 ± 0.8, and 3137.8 ± 1.0 keV with relative intensities of 100 ± 10, 63 ± 21, and 76 ± 21) is proposed. Arguments for J^π = (3/2⁺) and (1/2, 3/2^-) for the 3067 and 3232 keV levels are given. Evidence on the formation and decay of the 3945 keV complex of levels is reviewed. These calculations predict a ¹⁹N half life of 0.54 s and a neutron emission probability P_n = 0.87. They also predict J^π = 1/2^- for the ¹⁹N ground state and branching ratios for decay to ¹⁹O levels.

10. 19F(π-, γ)19O

Qm = 134.749

Transitions to ¹⁹O*(0[u], 4.9, 6.3) have been observed in the radiative capture of stopped negative pions (1983MA16).

11. 19F(n, p)19O

Qm = -4.037

See (1986HEZW; E_n = 200 MeV).

12. 19F(t, 3He)19O

Qm = -4.800

Differential cross sections for the ¹⁹O ground state and E_x = 0.1 MeV state were measured at E_t = 33 MeV (1991PI09). A DWBA analysis was carried out.