A=18O (1987AJ02)

g = -0.287 ± 0.015 [see (1983AJ01)]
Q = -4.2 ± 0.8 e · fm² [weighted mean of -3.6 ± 0.9 and -5.8 ± 1.5 e · fm²: see (1983GR28); see also (1983AJ01)].
B(E2; 0⁺ → 2⁺) = 39.0 ± 1.8 e² · fm⁴ [(1979FE06, 1983GR10); see also (1983AJ01)]; = 44.8 ± 1.3 e² · fm⁴ (1982NO04); = 47.6 ± 1.0 e² · fm⁴ (1982BA06); see also (1987RA01).
For a discussion of the hexadecapole deformation see (1983GR10). See also (1987RA01).

1. (a) ¹⁰B(⁹Be, p)¹⁸O Q_m = 16.8917
(b) ¹¹B(⁹Be, d)¹⁸O Q_m = 7.6621

See (1986CU02) for production cross sections of 1.98 MeV γ-rays.

2. ¹²C(⁷Li, p)¹⁸O Q_m = 8.400

Observed proton groups are displayed in Table 18.5 (in PDF or PS). See also (1983AJ01, 1986SM01).

3. ¹³C(⁶Li, p)¹⁸O Q_m = 10.704

Angular distributions of proton groups have been measured to the states shown in Table 18.5 (in PDF or PS) at E(⁶Li) = 28 MeV (1986SM01). It is found that when σ_tot to a particular state in ¹⁸O is large in this reaction, it is also large in the ¹²C(⁷Li, p) reaction. The relationship between the cross sections in this reaction and in reaction 1 depends on the parity of the final states (1986SM01).

4. ¹³C(⁹Be, α)¹⁸O Q_m = 12.8300

See (1983AJ01, 1983VO1A).

5. ¹³C(¹⁷O, ¹²C)¹⁸O Q_m = 3.098

See (1983AJ01) and (1984AB1A; theor.).

6. ¹⁴C(α, γ)¹⁸O Q_m = 6.2270

Resonances in the yield of capture γ-rays are observed at E_α = 1.14, 1.79, 2.09, 2.33, 2.44, 2.55 and 2.64 MeV: see Tables 18.6 (in PDF or PS) here and 18.5 (in PDF or PS) in (1978AJ03). Gamma-ray angular distribution and correlation measurements lead to J^π = 4⁺, 1^-, 1^- and 5^- for ¹⁸O*(7.11, 7.62, 8.04, 8.13), as well as to J^π assignments for lower states involved in the cascade decay. See also (1982AL30, 1983GA02, 1985GA1J) and (1986HA2D; astrophysics).

7. (a) ¹⁴C(α, α)¹⁴C E_b = 6.2270
(b) ¹⁴C(α, n)¹⁷O Q_m = -1.8172

Observed anomalies in the scattering [reaction (a)] for E_α = 2 to 8.2 MeV and the resonances in the relative neutron yield [reaction (b)] for E_α = 2.3 to 8.5 MeV are displayed in Table 18.6 (in PDF or PS). See also (1978AJ03) and (1985DE24, 1988UM1A; theor.).

8. (a) ¹⁴C(⁶Li, d)¹⁸O Q_m = 4.752
(b) ¹⁴C(⁶Li, dα)¹⁴C Q_m = -1.4751

At E(⁶Li) = 34 MeV angular distributions have been measured for the deuteron groups to many states of ¹⁸O (1981CU07) [see also (1983AJ01)] including ¹⁸O*(17.6 ± 0.2) (1982CU01). J^π = 4⁺, 2⁺, 2⁺, (4⁺) and (4⁺) are suggested for ¹⁸O*(7.86, 8.9, 12.04, 14.6, 17.0) (1981CU07). The 2⁺, 4⁺, 6⁺ and 8⁺ members of the K^π = O⁺₂ rotational band based on ¹⁸O*(3.62) are ¹⁸O*(5.26, 7.12, 11.69, 17.6) (1981CU07, 1982CU01).

Angular correlations have been measured at E(⁶Li) = 34 MeV; these lead to the assignment of J^π = 8⁺ to ¹⁸O*(17.6) (1982CU01) and to the assignment of J^π = 4⁺, 5^-, 6⁺, 7^- and 8⁺ to sixteen states in ¹⁸O with 11.4 < E_x < 23.1 MeV (1983CU03) [see also for assignment of ¹⁸O states to bands]. At E(⁶Li) = 32 MeV (1983AR11) find that the strongest groups are those to (unresolved) structures at E_x = 17.05 and 18.95 MeV [each Γ ≈ 0.35 MeV] dominated by J^π = 7^-. ¹⁸O*(11.6, 12.6) with J^π = (6⁺, 5^-) and 5^- are also observed (1983AR11). [See, however, the density of states]. See also (1985KO1B; theor.).

9. ¹⁴C(⁷Li, t)¹⁸O Q_m = 3.759

At E(⁷Li) = 20.4 MeV, triton groups are observed corresponding to a number of states of ¹⁸O with E_x < 12.6 MeV. Angular distributions were obtained for some of these, including ¹⁸O*(0, 1.98, 7.12, 11.69) with J^π = 0⁺, 2⁺, 4⁺, 6⁺. The latter two are the most strongly populated in this reaction: they appear to be part of the ground-state rotational band: see (1972AJ02). See also (1983GA02, 1984RU1A).

10. ¹⁴C(¹⁴C, ¹⁰Be)¹⁸O Q_m = -5.785

See (1985KO04).

11. ¹⁴C(¹⁶O, ¹²C)¹⁸O Q_m = -0.9349

See (1978AJ03).

12. ¹⁵N(¹³C, ¹⁰B)¹⁸O Q_m = -8.0421

See (1983AJ01).

13. ¹⁶O(t, p)¹⁸O Q_m = 3.7061

Proton groups corresponding to states of ¹⁸O are displayed in Table 18.7 (in PDF or PS) (1981CO13). See (1976LA13) for a general discussion of the properties of the states of ¹⁸O. Lifetime measurements are reported in Table 18.4 (in PDF or PS) of (1978AJ03). See also reaction 17, (1982AN12, 1985AN17) and (1985BA1A; theor.).

14. ¹⁶O(α, 2p)¹⁸O Q_m = -16.1080

At E_α = 65 MeV, the angular distribution to ¹⁸O*(3.55) [J^π = 4⁺] has been studied. In addition ¹⁸O*(8.04, 9.15, 10.3) are also populated: see (1983AJ01).

15. (a) ¹⁶O(¹⁰B, ⁸B)¹⁸O Q_m = -14.824
(b) ¹⁶O(¹³C, ¹¹C)¹⁸O Q_m = -11.480

At E(¹⁰B) = 100 MeV, ¹⁸O*(3.55) [first (d_5/2)²₄⁺ state] is preferentially populated. ¹⁸O*(1.98, 5.26, 7.12, 8.0, 8.3, 9.1) are also observed. At E(¹³C) = 105 MeV the angular distribution to ¹⁸O*(3.55) has been measured. See (1983AJ01) and (1983OS07; theor.).

16. (a) ¹⁷O(n, γ)¹⁸O Q_m = 8.0443
(b) ¹⁷O(n, n)¹⁷O E_b = 8.0443
(c) ¹⁷O(n, α)¹⁴C Q_m = 1.8172

For reaction (a) see (1983AJ01). [The work reported there has not been published.] The scattering amplitude (bound) a = 5.62 ± 0.45 fm, σ_free = 3.55 ± 0.25 b. The thermal cross section for reaction (c) is 235 ± 10 mb. See (1983AJ01) for references.

17. ¹⁷O(d, p)¹⁸O Q_m = 5.8197

Observed proton groups are displayed in Table 18.8 (in PDF or PS). At E_d = 12 MeV a strong, asymmetric peak is observed corresponding to E_x = 9.0 MeV. On the basis of this work and the measurement of the cross section to a peak at about the same energy observed in the ¹⁶O(t, p) reaction, (1985FO11) assign J^π = 4⁺ and a (1d_5/2) (1d_3/2) configuration to ¹⁸O*(9.0). Proton-γ coincidence measurements are shown in Table 18.4 (in PDF or PS).

18. ¹⁷O(¹²C, ¹¹C)¹⁸O Q_m = -10.677

Angular distributions involving ¹⁸O*(0, 1.98, 3.55) have been studied at E(¹²C) = 115 MeV: see (1983AJ01).

19. ¹⁸N(β^-)¹⁸O Q_m = 13.899

The transitions observed in the β^- decay are displayed in Table 18.9 (in PDF or PS) (1982OL01).

20. (a) ¹⁸O(γ, n)¹⁷O Q_m = -8.0443
(b) ¹⁸O(γ, 2n)¹⁶O Q_m = -12.1879
(c) ¹⁸O(γ, p)¹⁷N Q_m = -15.942
(d) ¹⁸O(γ, t)¹⁵N Q_m = -15.8336
(e) ¹⁸O(γ, α)¹⁴C Q_m = -6.2270

The cross sections for the (γ, p), (γ, n), (γ, 2n) and (γ, tot) [tot = total absorption] have been measured with monoenergetic photons to 42 MeV: observed resonances are displayed in Table 18.10 (in PDF or PS). All three of the partial cross sections have substantial strength in the giant resonance region; the (γ, 2n) cross section is a significant fraction of σ(γ, tot) and is even larger than σ(γ, p). Above the GDR the partial cross sections decrease but the integrated σ(γ, tot) between 29 and 42 MeV is about one-third of the value integrated from threshold to 42 MeV. The relative strengths of partial cross sections leads to the T assignments shown in Table 18.10 (in PDF or PS). The T_< and T_> components of the ¹⁸O photo absorption cross section are also derived (1979WO04). Structures in the (γ, α₀) cross section are reported at E_x = 18.2, 20.9, 22.1 and 24.2 MeV (1982BA03; E_brems.). The decay of the GDR to ¹⁴C, ¹⁵N, ¹⁶O, ¹⁷N and ¹⁷O states has been studied: see (1983AJ01). Less than 20% of the decays of states with 14.5 < E_x < 20 MeV goes via the n₀ channel (1987JU07). See (1978AJ03) for the earlier work, (1985SH1P), (1985PY01) and (1983KA28, 1984VA1G, 1985PY01, 1985VA1C; theor.)

21. ¹⁸O(γ, γ)¹⁸O

The Γ_γ₀ of ¹⁸O*(6.20) is 0.18 ± 0.03 eV, assuming Γ_γ₀/Γ = 0.88; E_x = 6202.7 ± 0.8 keV: see (1978AJ03).

22. ¹⁸O(e, e)¹⁸O

The ¹⁸O charge radius, < r² > ^1/2 = 2.784 ± 0.020 fm, based on studies of the elastic charge form factors for E_e = 70 to 370 MeV, the resulting determinations of the difference in the ¹⁸O and ¹⁶O radii, and the rms radius of ¹⁶O: see (1983AJ01).

Inelastic scattering has been reported to many states of ¹⁸O: see (1983AJ01) and Table 18.11 (in PDF or PS) here (1982NO04, 1983BE36, 1986MA48). See also (1987DE43) and (1986GU05, 1986ST15, 1987MI1E; theor.).

23. (a) ¹⁸O(π^±, π^±)¹⁸O
(b) ¹⁸O(π^±, π^±p)¹⁷N Q_m = -15.942
(c) ¹⁸O(π^-, π^-n)¹⁷O Q_m = -8.0443

Angular distributions for the scattering to ¹⁸O*(0, 1.98, 5.10) have been reported at E_π^± = 29.2 to 230 MeV [see (1983AJ01)] and at 50 MeV (1984TA1A; ¹⁸O*(0, 1.98)) at 140, 180 and 220 MeV (1984SE1A; ¹⁸O*(1.98)), at 164 MeV (1987CH14; ¹⁸O*(0, 1.98, 4.46, 5.10)) and at 180 MeV (1987MO07; ¹⁸O*(1.98)). < r²_n > ^1/2 = 2.81 ± 0.03 fm, < r²_n > ^1/2 - < r²_p > ^1/2 = 0.03 ± 0.03 fm: see (1983AJ01). For a discussion of the proton matter distribution in ¹⁸O see (1985BA27). For total reaction cross sections at E_π = 50 and 65 MeV see (1986ME1C; prelim.). At E_π = 165 MeV, the cross section for reaction (c) is larger for ¹⁸O than for ¹⁶O while reaction (b) has a lower cross section (1982PI06). For the (π⁺, 2p), (π⁺, pn) and (π^-, pn) reactions at E_π = 165 MeV see (1984AL20, 1986AL22). See also the "GENERAL" section here.

24. ¹⁸O(n, n)¹⁸O

Angular distributions have been measured for E_n = 2.9 to 24 MeV [see (1972AJ02, 1983AJ01)] and at E_n = 5.0 to 7.5 MeV (1986KO10; n₀, n₁).

25. ¹⁸O(p, p)¹⁸O

Angular distributions have been measured for E_p = 0.84 to 135 MeV [see (1978AJ03, 1983AJ01)], at E_p = 135 MeV (1986KE05; p₁) and at E_{pol. p} = 800 MeV (1982GL08; p to ¹⁸O*(0, 1.98, 7.12).

At E_p = 24.5 MeV (1974ES02) have studied the angular distributions of the proton groups to ¹⁸O*(1.98, 3.55, 3.63, 3.92, 4.46, 5.10, 5.26, 5.53, 7.12): a modified DWBA analysis leads to J^π = 2⁺, 4⁺, 0⁺, 2⁺, 1^-, 3^-, 2⁺, 2^- and 4⁺ for these states. A coupled-channels calculation suggests β₂ = 0.37 ± 0.03, 0.56 ± 0.06 and 0.18 ± 0.04 for ¹⁸O*(1.98, 5.10, 7.12). Such calculations also support evidence for a rotational band involving ¹⁸O*(0, 1.98, 7.12). The 3^- state at 5.10 MeV is stongly excited and collective in nature: B(E3) = 1120 e² · fm⁶. For ¹⁸O*(1.98, 3.92, 5.26), B(E2) = 45, 8.3 and 24 e² · fm⁴ (1974ES02). The 800-MeV data indicates that ¹⁸O*(7.12) can be described only if a large hexadecapole deformation is assumed (1982GL08). At E_p = 201 MeV forward angle σ(θ) have been measured to ¹⁸O*(8.21, 8.82, 16.40): it is proposed that ¹⁸O*(8.82) has J^π = 1⁺ and that additional 1⁺ strength is located in a group centered at E_x ≈ 10.1 MeV as well as in the region E_x = 12.4 to 15 MeV. The 1⁺; T = 2 state ¹⁸O*(18.87), reported in (e, e'), is not observed (1987DJ01).

¹⁸O*(1.98) has |g| = 0.287 ± 0.015 [τ_m = 2.99 ± 0.12 psec]. ¹⁸O*(3.55) has |g| = 0.62 ± 0.10 suggesting a mainly (d_5/2)² configuration for this state: see (1983AJ01). See also ¹⁹F, (1983CE1A) and (1982KU04, 1982NA13, 1984PH02, 1986DE1G, 1986PE1E; theor.).

26. ¹⁸O(p-bar, p-bar)¹⁸O

Angular distributions are reported with 178.4 MeV antiprotons to ¹⁸O*(0, 1.98) (1986BR04, 1986LE13). For atomic effects see (1986KO22). See also (1984PO1A), (1985LI16; theor.) and the "GENERAL" section here.

27. ¹⁸O(d, d)¹⁸O

Angular distributions have been reported at E_d = 7.0 to 15.0 MeV: see (1972AJ02, 1983AJ01). See also ²⁰F.

28. ¹⁸O(t, t)¹⁸O

See (1972AJ02).

29. ¹⁸O(³He, ³He)¹⁸O

The elastic scattering has been studied at E(³He) = 11.0 to 41 MeV [see (1972AJ02, 1983AJ01)] and at 14 MeV (1982AB04), at 25 MeV (1982VE13) [the matter radius, < r² > ^1/2_m = 2.59 ± 0.12 fm] and at E(³He) = 33 MeV (1983LE03; also A_y; and also to ¹⁸O*(1.98)). See also (1985HA11, 1987CO07; theor.).

30. ¹⁸O(α, α)¹⁸O

Angular distributions of many α-groups have been measured in the range E_α = 21 to 40.5 MeV [see (1978AJ03)], at 23.5 MeV (1984SA28; to ¹⁸O*(1.98, 3.56 + 3.63, 3.92, 4.45, 5.1 - 5.53)) and at 54.1 MeV (1987AB03; g.s.). The transitions to ¹⁸O*(4.46, 5.10) are L = 1 and 3, respectively, fixing J^π = 1^- and 3^- for these states. Measurements of α-groups near 180° for E_α = 20.0 to 23.4 MeV confirm assignments of natural parity for ¹⁸O*(1.98, 3.55, 3.63, 3.92, 4.46, 5.10, 5.26, 5.34, 6.20, 6.40, 7.12, 7.62, 7.86, 8.22, 8.29, 8.82, 8.96, 9.03, 9.10, 9.36, 9.41, 9.67, 9.72 ± 0.03, 9.88, 10.12, 10.30, 10.40, 11.62, 11.69). [See, however, Table 18.3 (in PDF or PS).] Levels at E_x = 5.38, 8.48 and 8.64 MeV were not observed, and those at 5.53, 6.35 and 6.88 MeV were populated weakly indicating unnatural parity: J^π = 3⁺ and 2^- respectively for ¹⁸O*(5.38, 5.53).

Alpha-gamma correlation measurements involving ¹⁸O states below E_x = 6.4 MeV [see Table 18.4 (in PDF or PS)] lead to J^π = 1^- and 3^- for ¹⁸O*(6.20, 6.40). Other J^π values agree with previous assignments. The transitions 3.92 → 1.98 and 5.26 → 1.98 are almost pure M1. For τ_m measurements see Table 18.4 (in PDF or PS) in (1978AJ03). For references see (1983AJ01). See also (1983WI12, 1984BR1P, 1984LA01, 1987AS01; theor.).

31. (a) ¹⁸O(⁶Li, ⁶Li)¹⁸O
(b) ¹⁸O(⁷Li, ⁷Li)¹⁸O

See (1972AJ02, 1983AJ01).

32. ¹⁸O(⁹Be, ⁹Be)¹⁸O

See (1972AJ02, 1983BI13, 1985BE1A) and (1984HA43; theor.).

33. (a) ¹⁸O(¹⁰B, ¹⁰B)¹⁸O
(b) ¹⁸O(¹¹B, ¹¹B)¹⁸O

An elastic angular distribution has been reported at E(¹¹B) = 115 MeV: see (1983AJ01). For reaction (a) see (1974AJ01).

34. (a) ¹⁸O(¹²C, ¹²C)¹⁸O
(b) ¹⁸O(¹³C, ¹³C)¹⁸O
(c) ¹⁸O(¹⁴C, ¹⁴C)¹⁸O
(d) ¹⁸O(¹²C, α¹²C)¹⁴C Q_m = -6.2270

Elastic angular distributions have been studied at E(¹⁸O) = 32.3 to 57.5 MeV for reaction (a) [as well as at E(¹⁸O) = 70, 100 and 140 MeV (1982HE07)] and at E(¹⁸O) = 31 MeV for reaction (b). Yields and fusion cross sections are reported by (1982BA49, 1982HE07, 1985BE40, 1985CA01, 1986GA13). See also (1983VO1B). For the earlier work see (1983AJ01). For reaction (c) see (1986STZY).

Angular correlations (reaction (d)) have been studied at E(¹⁸O) = 82 MeV. ¹⁸O*(7.10, 7.62, 7.86, 8.04, 8.22, 10.30, 11.59, 12.55) are observed: the first seven of these have J^π = 4⁺, 1^-, 5^-, 1^-, 2⁺, 4⁺, 5^- (1984BH01, 1984RA07). In addition ¹⁸O*(9.33, 9.65) are also populated [Γ ≈ 0.3 MeV]: a possible interpretation of the data is that these two are 3^- states and that there is in addition a very wide (> 1 MeV) 2⁺ state at ≈ 9.5 MeV (1984RA17). See also (1983CA1N), (1983BI13, 1984HA53) and (1982GI1C, 1982LO13, 1983CI08, 1983MA29, 1984FR1A, 1985CH1R, 1986HA13; theor.).

35. ¹⁸O(¹⁵N, ¹⁵N)¹⁸O

See (1983DU13).

36. ¹⁸O(¹⁶O, ¹⁶O)¹⁸O

Angular distributions have been measured at many energies for E(¹⁶O) = 24 to 54.5 MeV and E(¹⁸O) = 25 to 52 MeV, involving besides ¹⁸O_g.s., ¹⁸O*(1.98, 3.55 + 3.63, 3.92, 4.46, 5.10, 7.12). At E(¹⁸O) = 126 MeV ¹⁸O*(9.0) is relatively strongly populated. See (1983AJ01). For yields and fusion cross sections, including the effect of ¹⁸O*(1.98), see (1985TH03, 1985WU03, 1986GA13, 1986TH01). See also (1983DU13), (1986BA69) and (1983SH04, 1985MA1T, 1986DAZS, 1986VI08, 1987LO01; theor.).

37. (a) ¹⁸O(¹⁷O, ¹⁷O)¹⁸O
(b) ¹⁸O(¹⁸O, ¹⁸O)¹⁸O

Angular distributions involving ¹⁸O*(0, 1.98) are reported at E(¹⁷O) = 36 MeV. Angular distributions [reaction (b)] have been studied at E(¹⁸O) = 20 to 52 MeV. ¹⁸O*(3.55 + 3.63, 4.46, 5.10, 7.12) are also populated; see (1978AJ03, 1983AJ01). See also (1986GA13) and (1982CI1C, 1983DU13).

38. ¹⁸O(¹⁹F, ¹⁹F)¹⁸O

The elastic scattering has been studied at E(¹⁹F) = 27, 30 and 33 MeV: see (1983AJ01). See also (1986GA13) and (1982OH05; theor.).

39. (a) ¹⁸O(²⁴Mg, ²⁴Mg)¹⁸O
(b) ¹⁸O(²⁶Mg, ²⁶Mg)¹⁸O

Angular distributions are reported for reaction (a) at E(¹⁸O) = 29 and 35 MeV to ¹⁸O*(0, 1.98). See (1983AJ01, 1983BI13) and (1982LO13, 1983CI08, 1984FR1A, 1985HU04, 1986HA13, 1986OS05; theor.).

40. ¹⁸O(²⁷Al, ²⁷Al)¹⁸O

The elastic angular distribution has been studied at E(¹⁸O) = 100 MeV (1981ME13). See also (1985DEZZ), (1983AJ01, 1983BI13) and (1982LO13, 1983CI08, 1984FR1A, 1985HU04; theor.).

41. ¹⁸O(²⁸Si, ²⁸Si)¹⁸O

Elastic angular distributions are reported at E(¹⁸O) = 36 to 56 MeV [see (1983AJ01)] and at 351.7 MeV (1984BUZX; also to ¹⁸O*(1.98)). See also (1986BL08, 1986GA13), (1983BI13) and (1982LO13, 1983CI08, 1984FR1A, 1985HU04, 1986HOZF; theor.).

42. (a) ¹⁸O(⁴⁰Ca, ⁴⁰Ca)¹⁸O
(b) ¹⁸O(⁴⁴Ca, ⁴⁴Ca)¹⁸O
(c) ¹⁸O(⁴⁸Ca, ⁴⁸Ca)¹⁸O

Angular distributions have been measured at E(¹⁸O) = 62.1 MeV [reaction (a)] for the transitions to ¹⁸O*(0, 1.98, 5.10) (1982RE14). For fusion study [reaction (b)] see (1984DE38). See also (1985DE38, 1986OS05, 1986RO12; theor.).

43. ¹⁸F(β⁺)¹⁸O Q_m = 1.6554

See ¹⁸F.

44. ¹⁹F(γ, p)¹⁸O Q_m = -7.9942

(1985KE03) have measured the yields of proton groups to ¹⁸O*(0, 1.98) [and to unresolved states] for E_bs in the GDR range. See also (1978AJ03) and ¹⁹F.

45. ¹⁹F(n, d)¹⁸O

Angular distributions have been measured at E_n = 14 to 14.4 MeV: see (1972AJ02). See also (1978AJ03) and ²⁰F.

46. ¹⁹F(d, ³He)¹⁸O Q_m = -2.5007

Many states of ¹⁸O (E_x < 14.6 MeV) have been populated in this reaction: see Table 18.8 (in PDF or PS) in (1978AJ03). [Comment: Note, however, density of states.] Analyzing powers for the ground-state transition are reported at E_{pol. d} = 12.4 MeV (1983EN02). See also (1983KI13; theor.).

47. ¹⁹F(t, α)¹⁸O Q_m = 11.8198

See Table 18.12 (in PDF or PS).

48. ²²Ne(d, ⁶Li)¹⁸O Q_m = -8.194

At E_d = 80 MeV angular distributions have been measured for the ⁶Li groups to the ground state of ¹⁸O and to excited states at 1.98, 3.57, 5.10, 6.30, 7.8, 9.4 [± 0.04] MeV (1984OE02) [see also for S_rel]. For earlier work see (1983AJ01).