A=15O (1986AJ01)

The half-life of ¹⁵O is 122.24 ± 0.16 sec: see (1981AJ01); log f₀t = 3.637. The K/β⁺ ratio is (10.7 ± 0.6) × 10^-4: see (1976AJ04). See also (1982OS1C, 1983GO2C), (1981BA2G, 1982CO1D, 1983LI01, 1984BO1C, 1984DA1H, 1984HA1M, 1985KL1A; astrophys.), (1982KA1C; applied) and (1980AF1A, 1981ME1H, 1982OS1C; theor.).

2. ¹⁰B(¹⁴N, ⁹Be)¹⁵O Q_m = 0.7110

Angular distributions have been measured at E(¹⁴N) = 73.9 and 100 MeV: see (1981AJ01).

3. ¹¹B(¹⁴N, ¹⁰Be)¹⁵O Q_m = -3.9311

Elastic angular distributions have been studied at E(¹⁴N) = 41, 77 and 113 MeV: see (1976AJ04). See also (1984CL09; theor.).

4. (a) ¹²C(³He, γ)¹⁵O Q_m = 12.0758
(b) ¹²C(³He, n)¹⁴O Q_m = -1.1466 E_b = 12.0758
(c) ¹²C(³He, p)¹⁴N Q_m = 4.7789
(d) ¹²C(³He, d)¹³N Q_m = -3.5500
(e) ¹²C(³He, t)¹²N Q_m = -17.357
(f) ¹²C(³He, ³He)¹²C
(g) ¹²C(³He, α)¹¹C Q_m = 1.8563

Excitation functions and polarization measurements for these reactions have been measured over a wide range of energies: see Tables 15.20 in (1970AJ04 (in PDF or PS), 1976AJ04 (in PDF or PS)), (1981AJ01) and the text below. Observed resonances are displayed in Table 15.19 (in PDF or PS) here.

The 90° yield and angular distributions of γ₀, measured from E(³He) = 5.24 to 13.95 MeV show five resonances attributed to E1 transitions from J^π = 1/2⁺ or 3/2⁺, T = 1/2 states in the GDR characterized by a considerable 3p4h admixture (1978DE33 [also for ω_γ], 1984DE09). See also (1983MAZZ, 1984MAZP). The yield of n₀ (reaction (b)) shows resonances for E(³He) < 10 MeV and little structure above, to 30.6 MeV: see (1981AJ01) [n₁ and n₂₊₃₊₄ yields are also reported]. See also (1984SH04; Xn).

The yield of protons (reaction (d)) shows some clear resonances below E(³He) = 4.5 MeV and some uncorrelated structures at higher energies (to E(³He) = 12 MeV) with the possible exception of states at E_res = 7.8, 9.2 - 9.6 and (10.5) MeV. For E(³He) = 16 to 30.6 MeV no appreciable structure is observed in the p₀, p₁ and p₂ yields: see (1976AJ04). At E(³He) = 33 MeV A_y is measured for ¹⁴N*(0, 2.31, 3.95) (1983LE17, 1983RO22). For reaction (d) see (1981AJ01) and (1983DR06; E(pol. ³He) = 33 MeV; g.s.; also dp). See also (1984AB1G; Xd). For reaction (e) see (1976AJ04).

The elastic scattering (reaction (f)) shows some resonant structure near 3, 5 and 6 MeV and some largely uncorrelated structures in the range E(³He) = 16.5 to 24 MeV. There is some suggestion, however, of two resonances at E(³He) = 17 and 20 MeV: see (1976AJ04). Resonance-like behavior is also reported for E(pol. ³He) = 29 MeV. Polarization measurments are also reported for E(pol. ³He) = 20.5 to 32.6 MeV: see (1981AJ01). Recently the elastic yield has been measured for E(³He) = 1.0 to 2.7 MeV (1980VO1C). See also (1981AS04; n ³He cross section at 910 MeV). The yield of α-particles displays resonance structure below 8 MeV, and broad fluctuations for E(³He) = 12 to 18.6 MeV: see (1976AJ04). Polarization measurements are reported for E(pol. ³He) = 33.3 MeV for the α₀ and α₁ groups: see (1981AJ01). For total cross sections see (1980DE28, 1981PE01). For a fragmentation study at 10.78 GeV/c see (1985AB1H). See also (1983CA07, 1984AA01), (1980TR02, 1981RO1H, 1985BL1B) and (1981LE01, 1984NA06; theor.).

5. ¹²C(α, n)¹⁵O Q_m = -8.5019

Angular distributions of the n₀ group have been measured for E_α = 18.4 to 23.1 MeV: see (1976AJ04). At E_α = 41 MeV angular distributions are reported to ¹⁵O*(5.24, 6.89 + 7.26, 9.63, 10.48, 11.71, 12.85, 15.05). ¹⁵O*(0, 8.91, 11.1, 12.3, 13.45, 13.72, 14.27, 15.65) are also populated (1981OV01 [uncertainties in E_x are not shown; unresolved states are a problem]). See also (1981HAZV, 1983KOZD, 1984GO03) and ¹⁶O in (1986AJ04).

6. ¹²C(⁶Li, t)¹⁵O Q_m = -3.7198

States observed in this reaction are displayed in Table 15.20 (in PDF or PS) (1975BI06: E(⁶Li) = 59.8 MeV). Comparisons of angular distributions of the triton groups in this reaction and of the ³He groups to analog states in ¹⁵N have been made: analog correspondence is established for (10.48 - 10.70), (12.84 - 13.15(u)) and (15.05 - 15.49(u)) [E_x in ¹⁵O, E_x in ¹⁵N; u = unresolved] (1975BI06). See also (1976AJ04) for the earlier work, ¹⁸F in (1987AJ02) and (1980KR1F).

7. (a) ¹²C(¹⁰B, ⁷Li)¹⁵O Q_m = -5.712
(b) ¹²C(¹¹B, ⁸Li)¹⁵O Q_m = -15.133

See (1981AJ01).

8. ¹²C(¹²C, ⁹Be)¹⁵O Q_m = -14.2032

At E(¹²C) = 187 MeV, θ_lab = 8° the spectrum is dominated by ¹⁵O*(12.84, 15.05) [assumed J^π = 1/2^-, 13/2⁺, respectively]. ¹⁵O*(7.28) [J^π = 7/2⁺] is populated but ¹⁵O*(0, 6.79) are not observed. The situation is similar at E(¹²C) = 114 MeV but at E(¹²C) = 72 MeV (θ_lab = 11°) ¹⁵O*(0, 5.2, 7.28) are populated with comparable intensities: see (1976AJ04).

9. ¹³C(³He, n)¹⁵O Q_m = 7.1295

Observed groups are displayed in Table 15.22 (in PDF or PS) of (1981AJ01).

10. ¹⁴C(p, π^-)¹⁵O Q_m = -132.1139

At E_{pol. p} = 183 MeV differenatial cross sections and A_y are reported for the transitions to ¹⁵O*(0, 7.3), the two states strongly excited in the reaction (1982JA05, 1982VI05). See also (1982GR1K, 1984JA1F), (1984BEZZ; theor.) and the "GENERAL" section here.

11. ¹⁴N(p, γ)¹⁵O Q_m = 7.2970

Observed resonances in the yield of γ-rays are listed in Table 15.21 (in PDF or PS). Branching ratios are displayed in Table 15.18 (in PDF or PS).

The cross section increases from (8.5 ± 3.7) × 10^-12 b at 100 keV to (140 ± 30) × 10^-12 b at 135 keV. Extrapolation from the E_p = 0.28 MeV resonance gives S(0) = 2.75 ± 0.50 keV · b, with zero slope to E_p = 0.05 MeV. Measurements of E_γ lead to E_x = 5183 ± 1, 5240.9 ± 0.4, 6175 ± 2, 6794 ± 2, 6858 ± 2, 8284.1 ± 0.8, 8922 ± 2 and 8978 ± 2 keV.

The 90° yield γ₀ curve has been measured for E_p = 2.2 to 19.0 MeV: resonances are observed over most of the range in the γ₀ yield. The (γ₁ + γ₂) yield is relatively weak. For E_p = 18 to 28 MeV the excitation function for γ₀ decreases smoothly with energy: there is no evidence for structures. τ_m = 8.2 ± 1.0, > 3000, < 2.5, 16.0 ± 2.5 and 750 ± 200 fsec for ¹⁵O*(5.18, 5.24, 6.18, 6.86, 7.28), respectively. For references and additional discussions see (1976AJ04, 1981AJ01). See also (1982KR05, BL84E), (1980WE1D, 1982WE01) and (1980BA2M, 1982BA80, 1984BO1Q, 1984MA67, 1984TR1C; astrophys.).

12. ¹⁴N(p, n)¹⁴O Q_m = -5.9255 E_b = 7.2970

The excitation function has been measured for E_p = 6.3 to 12 MeV: see (1970AJ04). Observed resonances are displayed in Table 15.21 (in PDF or PS). The cross section [obtained by measuring the 2.31 MeV γ-rays from the ¹⁴O(β⁺) decay] is reported at 12 energies in the range E_p = 7 to 22 MeV (1981DY03). The ratio of the cross section to ¹⁴O_g.s. to that for the analog state ¹⁴N*(2.31) [from the (p, p') reaction] has been determined at E_p = 35 MeV (1984TA02). See also ¹⁴O.

13. (a) ¹⁴N(p, p)¹⁴N E_b = 7.2970
(b) ¹⁴N(p, d)¹³N Q_m = -8.3289

The yields of elastic and inelastic protons, and of 2.31 MeV γ-rays, have been studied at many energies: see (1959AJ76, 1970AJ04, 1976AJ04). Observed resonances are displayed in Table 15.21 (in PDF or PS). At higher energies excitation functions have been measured for the p₀, p₁ and p₂ groups for E_p = 17 to 26.5 MeV: there is no evidence for resonant behavior but the p₁ yield shows a large increase between E_p = 20 and 23 MeV. Total cross sections for the p₀ → p₉ groups have been measured at E_p = 8.6, 10.6, 12.6 and 14.6 MeV. See (1981AJ01) and ¹⁴N.

Polarization measurements have been reported for E_p = 3.0 to 155 MeV: see Table 15.25 (in PDF or PS) in (1970AJ04), and (1976AJ04). A_y measurements have also been reported at E_{pol. p} = 21 MeV (1982AO05; to ¹⁴N*(0, 2.31, 3.95) and ¹³N*(0, 3.51)) and at 159.4 MeV (1983TA12; p₀, p₁, p₂). See also (1980LE28), (1981DY03, 1984RE14) and (1984AN1M; theor.).

14. ¹⁴N(p, ³He)¹²C Q_m = -4.7789 E_b = 7.2970

Excitation functions for the ground-state group have been measured at E_p = 7 to 11 MeV: some resonant structure is indicated [see Table 15.21 (in PDF or PS)]. See also (1976AJ04).

15. ¹⁴N(p, α)¹¹C Q_m = -2.9226 E_b = 7.2970

Excitation functions and total cross-section measurements have been carried out for the α₀ group for E_p = 3.8 to 45 MeV: see (1976AJ04). Fairly sharp structures persist until E_p = 15 MeV: see Table 15.21 (in PDF or PS) here and footnote ^e in Table 15.23 (in PDF or PS) of (1981AJ01).

16. ¹⁴N(d, n)¹⁵O Q_m = 5.0724

Angular distributions have been studied at many energies in the range E_d = 0.9 to 11.8 MeV: see Table 15.27 (in PDF or PS) in (1970AJ04), and (1976AJ04). τ_m = 3.2 ± 0.5 psec, < 28 fsec, 0.70 ± 0.15 psec, respectively for ¹⁵O*(5.24, 6.79, 7.28): see (1970AJ04). K^y'_y(0°) have been measured for E_{pol. d} ≈ 7.5 to ≈ 14 MeV for the pol. n to an unresolved group involving at least ¹⁵O*(6.79, 7.55) (1981LI23). See also Table 15.22 (in PDF or PS), (1983MU13; theor.) and ¹⁶O in (1986AJ04).

17. ¹⁴N(³He, d)¹⁵O Q_m = 1.8034

See Table 15.22 (in PDF or PS) and (1976AJ04). See also (1985HA01) and ¹⁶F in (1986AJ04).

18. ¹⁴N(α, t)¹⁵O Q_m = -12.5171

See (1976AJ04).

19. (a) ¹⁴N(¹¹B, ¹⁰Be)¹⁵O Q_m = -3.9319
(b) ¹⁴N(¹³C, ¹²B)¹⁵O Q_m = -10.237

Differential cross sections are reported for ¹⁵O*(0, 6.86, 7.28) at E(¹¹B) = 115 MeV and for ¹⁵O_g.s. at E(¹³C) = 105 MeV (1980PR09).

20. ¹⁵N(π⁺, π⁰)¹⁵O Q_m = 1.850

Angular distributions to ¹⁵O_g.s. have been studied at E_π⁺ = 48 MeV (1984CO04) and 165 MeV (1982DO10). At 48 MeV a deep forward-angle minimum is observed. It appears to reflect the analogous minimum in the free-nucleon cross section which is caused by cancellation between the s- and p-wave π-nucleon amplitudes (1984CO04).

21. ¹⁵N(p, n)¹⁵O Q_m = -3.5363

Angular distributions have been measured for the n₀ group at E_p = 3.95 to 18.5 MeV [and for the n₂ group at E_p = 5.5 MeV]: see (1981AJ01) for the earlier work, (1981MU01: E_p = 5.5 to 9.3 MeV) and (1981BY01; 9.1 to 15.6 MeV). At E_p = 160 MeV transitions are observed to ¹⁵O*(0, 6.2, (9.6)): the transition to ¹⁵O*(6.2) [3/2^-] is significantly more quenched than the 1/2 → 1/2 transition, as is also the case in ¹³C(p, n) (1985GO02). At E_p = 135 MeV ¹⁵O*(10.5) is weakly populated (1985PAZV). See also (1981BY1B, 1981WA1F, 1984TAZS, 1985KI1L), and (1983BY03) in ¹⁶O (1986AJ04).

22. ¹⁵N(³He, t)¹⁵O Q_m = -2.7726

Angular distributions for the t₀, t₁₊₂, t₃, t₄₊₅, t₆ and t₇ groups have been studied for E(³He) = 16.5 to 44.6 MeV: see (1976AJ04).

23. ¹⁶O(γ, n)¹⁵O Q_m = -15.6639

The spectrum of photoneutrons has been investigated at many energies. Measurements over the giant dipole resonance region show the predominant strength is to the J^π = 1/2^- and 3/2^- states E_x = 0 and 6.18 MeV, consistent with the basic validity of the single-particle, single-hole theory of photoexcitation in ¹⁶O. However, the positive-parity states at E_x = 5.18, 5.24, 6.86 MeV are also populated suggesting some more complicated excitations in ¹⁶O: see (1970AJ04, 1976AJ04). Differential cross sections for the n₀ group have been measured from threshold to E_γ = 28 MeV [see (1976AJ04)] and at E_γ = 60 to 160 MeV (1980GO13, 1982GO09, 1982SC02 [also ¹⁵O*(6.18); no appreciable strength in the 5.2 MeV doublet]). In the energy range E_γ = 30 - 35 MeV, ≈ 4% of the isovector energy-weighted sum rule is found in the (γ, n₀) channel (1984KU21). See also (1981AJ01), ¹⁶O in (1986AJ04) and (1981GA1M, 1982LO1B).

24. (a) ¹⁶O(π⁺, p)¹⁵O Q_m = 124.6857
(b) ¹⁶O(π⁺, π⁺n)¹⁵O Q_m = -15.6639

For reaction (a) see (1982DO01). At E_π⁺ = 2.0 GeV/c differential cross sections have been determined for the transition to ¹⁵N*(6.2) (1983KI01). See also (1982LO1B).

25. ¹⁶O(p, d)¹⁵O Q_m = -13.4393

Angular distributions have been reported at many energies for E_p = 18.5 to 155.6 MeV [see Table 15.30 (in PDF or PS) in (1970AJ04), and (1976AJ04)] and at E_{pol. p} = 65 MeV (1980HO18; d₀). At those energies ¹⁵O*(0, 6.18) are primarily populated. At E_p = 800 MeV (1984SM04) report the population of ¹⁵O*(0, 5.18 + 5.24, 6.18, 7.28 + 7.56, 8.84 + 0.15, 10.42 ± 0.15, 10.87 ± 0.15, 12.21 ± 0.15, 13.59 ± 0.15, 19.0 ± 0.2, 21.1 ± 0.2) [the last states have Γ ≥ 0.8 MeV]. See also (1981LI1B), (1982LO1B) and ¹⁷F in (1986AJ04).

26. ¹⁶O(d, t)¹⁵O Q_m = -9.4066

Angular distributions have been reported at a number of energies in the range E_d = 20 to 52 MeV: see (1981AJ01) and reaction 62 in ¹⁵N here. See also ¹⁸F in (1983AJ01).

27. (a) ¹⁶O(³He, α)¹⁵O Q_m = 4.9139
(b) ¹⁶O(³He, tp)¹⁵O Q_m = -14.9002

The p_1/2 and p_3/2 hole states ¹⁵O*(0, 6.18) are strongly populated. Information on these and other states are displayed in Table 15.25 (in PDF or PS) of (1981AJ01). Angular distributions have been measured at energies up to E(³He) = 217 MeV: see (1981AJ01). Branching ratios and multipole mixing ratios are displayed in Table 15.18 (in PDF or PS). (1978BE73) report τ_m of ¹⁵O*(5.24) = 3.25 ± 0.30 psec, |g| = 0.260 ± 0.028. (1983BI10) determine g = +0.17 ± 0.07. For reaction (b) see (1984ST10; E(³He) = 81 MeV) and ¹⁶O. See also ¹⁹Ne in (1983AJ01), (1982AB04), (1983GO2D; applied) and (1982LO1B).

28. (a) ¹⁶O(¹⁰B, ¹¹B)¹⁵O Q_m = -4.2098
(b) ¹⁶O(¹²C, ¹³C)¹⁵O Q_m = -10.7176

Angular distributions involving ¹⁵O_g.s. have been investigated at E(¹⁰B) = 100 MeV: see (1981AJ01). See also (1983OS08; theor.). For reaction (b) see (1984FL1B; theor.).

29. ¹⁷O(p, t)¹⁵O Q_m = -11.3257

At E_p = 39.8 MeV angular distributions of t₀ and t₃ groups have been compared to those of the ³He groups to the analog states in ¹⁵N. At E_p = 45 MeV a state, assumed to be the J^π = 5/2⁺, T = 3/2 analog of ¹⁵C*(0.74), is observed at E_x = 12.255 ± 0.013 MeV, Γ_c.m. = 135 ± 15 keV. The state decays by proton emission to the T = 1, 0⁺ state ¹⁴N*(2.31) [the population of some T = 1/2 states is also reported]: see (1981AJ01). See also (1984VOZY).

30. ¹⁹F(³He, ⁷Li)¹⁵O Q_m = -4.318

See (1976AJ04).