A=17O (1993TI07)

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¹⁷O (1993TI07)

(See Energy Level Diagrams for ¹⁷O)

GENERAL: See 2 [Electromagnetic Transitions in A = 16-17] (in PDF or PS), 17.9 [General Table] (in PDF or PS) and 17.10 [Table of Energy Levels] (in PDF or PS).

μ = -1.89379 (9) n.m. [see (1989RA17)].

Q = -25.78 mb [see (1989RA17)].

Isotopic abundance = (0.038 ± 0.003)% (1984DE53).

For Coulomb excitation of ¹⁷O*(0.87) see (1982KU14).

1. ⁷Li(¹⁴N, α)¹⁷O

Q_m = 16.155

See (1977AJ02, 1987SHZS).

2. ⁹Be(¹⁶O, ⁸Be)¹⁷O Q_m = 2.478

See (1982AJ01).

3. (a) ¹⁰B(⁷Li, p)¹⁶N Q_m = 13.986 E_b = 27.766
(b) ¹⁰B(⁷Li, d)¹⁵N Q_m = 13.720
(c) ¹⁰B(⁷Li, t)¹⁴N Q_m = 9.144
(d) ¹⁰B(⁷Li, α)¹³C Q_m = 21.408

See (1977AJ02).

4. ¹⁰B(⁹Be, d)¹⁷O Q_m = 11.070

Cross sections for populating ¹⁷O*(0.87) were measured at E_cm = 2.38, 2.89, 3.16 MeV by (1986CU02).

5. (a) ¹¹B(⁶Li, p)¹⁶N Q_m = 9.782 E_b = 23.562
(b) ¹¹B(⁶Li, d)¹⁵N Q_m = 9.516
(c) ¹¹B(⁶Li, t)¹⁴N Q_m = 4.940
(d) ¹¹B(⁶Li, α)¹³C Q_m = 17.204

See (1977AJ02).

6. ¹¹B(¹¹B, X)¹⁷O

Cross sections for populating ¹⁷O*(0.87, 3.06, 3.84) were measured at E_cm = 2.22 - 3.23 MeV by (1986CU02).

7. ¹²C(⁶Li, p)¹⁷O Q_m = 7.605

Angular distributions have been studied for E(⁶Li) = 3 - 28 MeV [See (1982AJ01, 1986AJ04)]. More recently, differential cross sections at E(⁶Li) = 28 MeV were measured by (1986SM10). Many of the known levels in ¹⁷O were populated. See 17.11 (in PDF or PS). Hauser-Feshbach calculations and DWBA analyses were carried out for the data.

8. ¹²C(⁷Li, d)¹⁷O Q_m = 2.580

See 17.6 (in PDF or PS) in (1977AJ02) and ¹⁹F in (1983AJ01).

9. ¹²C(⁹Be, α)¹⁷O Q_m = 9.732

Angular distributions have been reported at E(⁹Be) = 16.1 - 20 MeV [see (1982AJ01)] and at E(⁹Be) = 12.0 - 27.0 MeV (1981JA09; α₀, α₂). For excitation functions see (1982AJ01, 1986AJ04), and see (1988GO1G).

10. ¹²C(¹³C, ⁸Be)¹⁷O Q_m = -1.007

Excitation functions at E_cm = 13.4 - 16.8 MeV and angular distributions at E_cm = 13.8 and 16.38 MeV have been measured by (1988JA14).

11. ¹³C(α, γ)¹⁷O Q_m = 6.358

At E_α = 3.65 and 6.17 MeV [¹⁷O*(9.15, 11.08)] Γ_αΓ_γ₁/Γ = 0.65 ± 0.07 and 1.46 ± 0.13 eV, respectively. Assuming Γ_α/Γ = 0.45 for the lower resonance, Γ_γ₁ for the E1 transition from ¹⁷O*(9.15) [J^π = 1/2^-] to ¹⁷O*(0.87) [1/2⁺] is 1.44 ± 0.26 eV. The parameters of ¹⁷O*(11.08) are discussed in 17.16 (in PDF or PS). See (1986AJ04).

12. (a) ¹³C(α, n)¹⁶O Q_m = 2.215 E_b = 6.358
(b) ¹³C(α, α)¹³C Q_m = 2.215

The yield of neutrons increases monotonically for E_α = 0.475 to 1 MeV: for S(E) see (1977AJ02, 1982AJ01). Resonances observed in the yield of neutrons and through the anomalies in the elastic scattering are displayed in 17.12 (in PDF or PS). See also (1986AJ04). Cross sections for reaction (a) at E_α = 0.40 - 1.20 MeV were measured by (1989KEZZ). Distributions of alpha particle strength were obtained by (1988LE05). See also (1985CA41, 1987BU27).

A microscopic analysis of reactions (a) and (b) with the generator-coordinate method was carried out by (1987DE38).

13. ¹³C(⁶Li, d)¹⁷O Q_m = 4.883

Angular distributions are reported at E(⁶Li) = 35.5 MeV to ¹⁷O*(13.58 ± 0.02), which is strongly populated. Comparisons with ¹²C(⁶Li, d)¹⁶O*(16.29) and with the results of reaction 14 below suggest that the peak corresponding to ¹⁷O*(13.58) contains a state or states of spin 11/2^-, 13/2^-, or both, based on ¹⁶O*(16.29) (1978CL08). (d, α) angular correlations [E(⁶Li) = 26, 29 and 34 MeV] indicate the involvement of ¹⁷O states at 13.6 ± 0.1 [l= 6], 14.15 ± 0.1 [5], 15.1 ± 0.1 [5], 15.95 ± 0.15 [5], 16.6 ± 0.15 [6], 17.1 ± 0.15 [6], 19.6 ± 0.15 [7], 20.2 ± 0.15 [7], 21.2 [7], and 22.1 MeV, Γ ≈ 0.1, 0.5, 0.7, and 0.25 MeV for ¹⁷O*(14.2, 15.1, 16.0, 19.6, 20.2) (1978AR15). See, however, (1984CA39). For the earlier work see 17.7 (in PDF or PS) in (1977AJ02).

Measurements and analysis by (1987CA30) of data at E(⁶Li) = 34 MeV for deuteron peaks corresponding to ¹⁶O*(16.1, 13.6) indicated that the reaction proceeds by a direct alpha transfer process which populates doublets of interfering ¹⁷O levels.

14. ¹³C(⁷Li, t)¹⁷O Q_m = 3.891

Angular distributions are reported to ¹⁷O*(3.06) and to ¹⁷O*(13.58), which is preferentially populated (see discussion in reaction 13), at E(⁷Li) = 35.7 MeV. Narrow states at E_x = 14.86, 18.17 and 19.24 MeV are also strongly excited (1978CL08). See (1986AJ04) and for the earlier work see 17.6 (in PDF or PS) in (1977AJ02). Recent measurements of the cross section for E_c.m. = 1.46 - 6.48 MeV are reported in (1990DA03).

15. ¹³C(⁹Be, αn)¹⁷O Q_m = 4.786

Cross sections for population of ¹⁷O*(0.87, 3.06, 3.84) were measured at E_cm = 2.76 - 4.82 MeV by (1986CU02).

16. ¹³C(¹³C, ⁹Be)¹⁷O Q_m = -4.288

States of ¹⁷O with E_x = 3.9, 5.2, 5.8 ± 0.1, 7.2, 7.6, 8.4 ± 0.06, 8.9, 9.8 ± 0.07, 10.55 ± 0.06, 12.1 ± 0.06, 13.3, 14.6 and 18.9 ± 0.14 MeV have been reported (1979BR04) at E(¹³C) = 105 MeV.

17. ¹³C(¹⁶O, ¹²C)¹⁷O Q_m = -0.803

Angular distributions involving ¹⁷O*(0, 0.87) have been studied for E(¹⁶O) = 12 - 25 MeV: see (1977AJ02, 1982AJ01, 1986AJ04). See also (1989FR04). More recently, cross sections were measured for E_c.m. = 4.8 - 9.8 MeV by (1991DA05). A calculation involving application of the nuclear molecular-orbital model and Landau-Zener coupling effects is discussed in (1990IM01).

18. ¹⁴C(³He, γ)¹⁷O Q_m = 18.760

The capture cross sections at 90° for γ₀ and for γ₁ have been studied for E(³He) = 3.2 to 7.5 MeV and angular distributions of the γ-rays have been studied at the six observed resonances: see 17.13 (in PDF or PS).

19. (a) ¹⁴C(³He, n)¹⁶O Q_m = 14.617 E_b = 18.76
(b) ¹⁴C(³He, ³He)¹⁴C
(c) ¹⁴C(³He, α)¹³C Q_m = 12.402

See 17.13 (in PDF or PS). See also (1977AJ02), ¹³C and ¹⁴C in (1986AJ01) and ¹⁶O here.

20. ¹⁴C(⁶Li, t)¹⁷O Q_m = 2.964

At E(⁶Li) = 34 MeV angular distributions have been reported (1986AJ04) to ¹⁷O*(0,0.87, 3.06, 3.84, 4.55, 5.70, 6.36, 7.17 (u), 7.38 (u), 7.76, 8.20, 8.47 (u), 9.18 (u), 9.71, 9.87 (u), 10.42, 11.24, 11.82, 12.01, 12.27, 13.00 (u), 13.6 (u), 14.76 (u), 15.20, 16.3 (u)) (1981CU11, 1983CU02, 1983CU04; u = unresolved). (1983CU02) suggests evidence for two 3p-2h bands in ¹⁷O and (1983CU04) for analog states in ¹⁷N - ¹⁷O. See these two papers for spectroscopic factors.

21. ¹⁴N(t, γ)¹⁷O Q_m = 18.622

The excitation functions for γ₀ and γ₁ have been measured for E_t = 0.8 to 3.3 MeV: broad resonances are observed at 2.2 and 2.8 MeV in the γ₀ cross section, and at 2.4 and 2.8 MeV in the γ₁ cross section. Both also exhibit a structure at 1.5 MeV. The data are consistent with the states in 17.14 (in PDF or PS) and possibly with a state at ≈ 19.3 MeV (1980LI05). For the charged particle channels see (1977AJ02).

22. (a) ¹⁴N(α, p)¹⁷O Q_m = -1.193
(b) ¹⁴N(α, αp)¹³C Q_m = -7.551

Angular distributions have been measured for ¹⁷O states with E_x < 7.6 MeV in the range E_α = 8.1 → 33.3 MeV: see a listing of the references in (1971AJ02). The sequential decay (reaction (b)) appears to take place via ¹⁷O states with 8.46 ≤ E_x ≤ 13.57 MeV. Those involved are believed to have J ≥ 5/2, Γ_α/Γ ≥ 0.6. See also the measurements at E_α = 48 MeV of (1987MIZY, 1988BRZY).

23. (a) ¹⁴N(⁶Li, ³He)¹⁷O Q_m = 2.826
(b) ¹⁴N(⁶Li, ³Heα)¹³C Q_m = -3.532

Angular distributions (a) and angular correlations (b) have been measured at E(⁶Li) = 36 MeV involving ¹⁷O*(8.48, 10.7, 12.0, 13.53, 14.88). Comparisons are made with the results in the analog reaction (⁶Li, t) involving states in ¹⁷F. See (1982AJ01, 1986AJ04).

24. ¹⁴N(⁷Li, α)¹⁷O Q_m = 16.155

See (1986NE1A).

25. (a) ¹⁵N(d, γ)¹⁷O Q_m = 14.046 E_b = 14.046
(b) ¹⁵N(d, n)¹⁶O Q_m = 9.903
(c) ¹⁵N(d, p)¹⁶N Q_m = 0.266

Radiative capture cross sections (reaction (a)) have been measured for E_x = 25 - 40 MeV by (1986ANZL, 1988CO1D). Excitation functions have been measured for E_d = 0.5 - 5.9 MeV (b) and 0.3 - 6.3 MeV (reaction (c)): see (1977AJ02). Unresolved structures are observed in the neutron data. There is some evidence for structures at E_d = 1.8 MeV [p₀, p₁, p₃] and 2.4 MeV [p₂] [¹⁷O*(15.6, 16.2)]: see (1982AJ01). See also (1986AJ04) and ¹⁶N, ¹⁶O here.

26. ¹⁵N(d, d)¹⁵N E_b = 14.046

Excitation functions for have been measured for E_d = 1.4 to 6.25 MeV. Structures are reported at ≈ 1.4 and 1.8 MeV: see (1982AJ01, 1986AJ04).

27. (a) ¹⁵N(d, t)¹⁴N Q_m = -4.576
(b) ¹⁵N(d, α)¹³C Q_m = 7.688 E_b = 14.046

Differential cross sections and analyzing powers for reaction (a) were measured for E_d = 88, 89 MeV by (1988SA19, 1988SAZY). Yield curves for reaction (b) have been measured for E_d = 0.8 to 2.7 MeV. Structures are reported at E_d = 1.06, 1.25 and ≈ 1.8 MeV. The latter has Γ ≈ 300 keV: see (1982AJ01).

28. ¹⁵N(³He, p)¹⁷O Q_m = 8.552

Observed proton groups are displayed in 17.15 (in PDF or PS). For the parameters of the first T = 3/2 state see 17.16 (in PDF or PS).

29. ¹⁵N(α, d)¹⁷O Q_m = -9.802

At E_α = 45.4 MeV, the deuteron spectrum is dominated by the groups corresponding to states with E_x = 7.742 ± 0.020 and 9.137 ± 0.030 MeV. These states are assigned J^π = (11/2^-) and (9/2^-) and arise from a dominant (d_5/2)²₅p^-1_1/2 configuration: see (1977AJ02).

30. ¹⁵N(¹¹B, ⁹Be)¹⁷O Q_m = -1.769

See (1982AJ01).

31. ¹⁶O(n, γ)¹⁷O Q_m = 4.143

The capture cross section for thermal neutrons is σ_capt. = 202 ± 28 μb (1977MC05). See also (1981MUZQ). At thermal energies the branchings via ¹⁷O*(0.87, 3.05) are (18 ± 3) and (82 ± 3)%; E_γ = 870.89 ± 0.22 and 2184.47 ± 0.12 keV [the latter leads to E_x = 3055.43 ± 0.19 keV for ¹⁷O*(3.09); [see (1986AJ04)]. The cross section for two-photon emission σ_2γ < 3 ± 19 μb for 1200 < E_γ < 2943 keV. The two-photon branching ratio is (1.6 ± 10) × 10^-2 (1977MC05). The mechanism of p-wave neutron resonance capture was studied by measurements of gamma spectra from the E_n = 434 keV resonance (E_x = 4552 keV) by (1988KI02, 1992IG01). Partial radiative widths and off-resonance capture cross sections were obtained. See footnote ^b) in 17.17 (in PDF or PS) and see 2 (in PDF or PS) in the Introduction of this compilation.

32. ¹⁶O(n, n)¹⁶O E_b = 4.143

The scattering length (bound) a = 5.805 ± 0.005 fm, σ_free = 3.761 ± 0.007 b (1979KO26). See also (1981MUZQ). Resonances observed in the elastic scattering and in the (n, α) reaction are displayed in 17.17 (in PDF or PS). A two-channel R-matrix analysis finds that five states contain nearly 100% of the 1d_3/2 strength and have their eigenenergy at E_x ≈ 5.7 MeV [the dominant state is ¹⁷O*(5.08)]. Spectroscopic factors are deduced for 26 states in ¹⁷O for 4.5 < E_x < 9.5 MeV [see 17.12 (in PDF or PS) in (1977AJ02)]: the sum of these factors is 1% for J^π = 1/2⁺ , 5% for 1/2^-, 12% for 3/2^-, 99% for 3/2⁺, 0.1% for 5/2⁺, 1% for 5/2^- and 14% for 7/2^-. T = 3/2 resonances are discussed by (1981HI01): see 17.16 (in PDF or PS) and 17.17 (in PDF or PS). See also the review of neutron resonance spectroscopy by (1986WE1B).

Cross-section measurements are listed in 17.10 (in PDF or PS) of (1971AJ02) and in (1977AJ02, 1982AJ01). An optical model analysis of angular distributions leads to predictions of σ_R and σ_T for E_n = 6 to 19 MeV (1983DA22). Analyzing power measurements for n₀ have been carried out at E_n = 5 - 23 MeV (1986AJ04). More recently scattering cross sections have been reported for E_n = 14.1 MeV (1986BAYL) and E_n = 21.6 MeV (1990OL01). Optical model parameters were deduced. Small angle scattering cross sections at E_n = 14.8 MeV are reported by (1992QI02). Neutron total cross section measurements from 160 to 575 MeV are reported by (1988FR23) from an experiment which included a test of charge symmetry. An experimental study of p-wave strength functions is described in (1988KO18).

A cascade statistical-model study of nucleon induced reactions in the range 50 MeV - 1 GeV is reported in (1990TA21). A resonating group study of the ¹⁶O + single nucleon problem is discussed in (1990HA38). See also the analyses reported in (1992KA21) and (1992KA41).

Neutron elastic-scattering observables were calculated on the basis of the relativistic impulse approximation by (1991KA22).

33. ¹⁶O(n, n')¹⁶O* E_b = 4.143

A number of resonances have been observed in the cross sections for production of 6.13 and (6.92 + 7.12) MeV γ-rays: see 17.13 (in PDF or PS) in (1977AJ02) and (1982AJ01). For cross-section measurements see 17.10 (in PDF or PS) in (1971AJ01) and (1977AJ02, 1982AJ01). Studies of circular polarization of gamma rays from inelastic scattering of partially polarized neutrons from a nuclear reactor are reported by (1988LI34). See also the measurements at E_n = 21.6 MeV and DWBA coupled channels analysis reported in (1990OL01).

34. (a) ¹⁶O(n, p)¹⁶N Q_m = -9.637 E_b = 4.143
(b) ¹⁶O(n, d)¹⁵N Q_m = -9.903
(c) ¹⁶O(n, t)¹⁴N Q_m = -14.479
(d) ¹⁶O(n, ³He)¹⁴C Q_m = -14.617

See (1982AJ01). See also (1981HAZJ, 1982HA1A). Differential cross sections for neutron-induced reactions (a, b, c, d) have been measured for incident neutron energies of 27.4, 39.7, and 60.7 MeV by (1986RO1F, 1986SU15).

In a recent measurement of reaction (a) at E_n = 298 MeV, the Gamow-Teller and spin dipole strength functions were extracted (1991HI05).

35. ¹⁶O(n, α)¹³C Q_m = -2.215 E_b = 4.143

17.17 (in PDF or PS) displays the results from a multilevel two-channel R-matrix analysis of the data from this reaction and from the elastic scattering of neutrons: see (1982AJ01). See also (1981HAZJ, 1982HA1A). More recently differential cross sections were measured for incident neutron energies of 27.4, 39.7, and 60.7 MeV by (1986RO1F, 1986SU15).

36. ¹⁶O(p, π⁺)¹⁷O Q_m = -136.207

Angular distributions have been measured at E_p = 185 and 800 MeV [to ¹⁷O*(0, 0.87, 3.05)] [see (1982AJ01)], as well as at E_p = 154 to 185 MeV [for π⁺ to ¹⁷O*(0, 0.87)]. See (1986AJ04). More recently angular distributions and analyzing powers at E_p = 250, 354, 489 MeV were measured to ¹⁷O*(0, 5.22, 7.76, 15.78) by (1988HU02) and to ¹⁷O*(0, 5.22, 7.76, 14.20, 14.60) at E_p = 200 MeV by (1987AZZZ, 1988AZZZ). Studies of (p, π⁺) reactions to the Δ₁₂₃₂ region are described in (1988HU06).

A relativistic stripping model is applied to the ¹⁶O(p, π⁺)¹⁷O reaction and discussed in (1986CO20).

37. ¹⁶O(d, p)¹⁷O Q_m = 1.919

Observed proton groups are displayed in 17.14 (in PDF or PS) of (1977AJ02). Angular distributions have been measured at many energies in the range E_d = 0.3 - 698 MeV [see (1982AJ01, 1986AJ04)] and at E_d = 12.3 MeV (1990PI05). Reported level parameters are τ_m = 258.6 ± 2.6 psec [see 17.7 (in PDF or PS) in (1971AJ02)] and E_x = 870.749 ± 0.020 keV [E_γ = 870.725 ± 0.020 keV] for ¹⁷O*(0.87) and Γ_n = 97 ± 5 keV for ¹⁷O*(5.09): see (1982AJ01), and see (1988GU1E). Recent measurements at E_d = 12.3 MeV (1990PI05) determined high precision excitation energies for the first ten levels of ¹⁷O (see 17.10 (in PDF or PS)). For applications, see (1990CA32, 1992LA08).

Theoretical studies of breakup and rearrangement reactions including ¹⁶O(d, p)¹⁷O carried out by means of a coupled-channels variational method are discussed in (1986KA1A, 1986KA1B).

See also ¹⁸F in (1983AJ01, 1987AJ02).

38. (a) ¹⁶O(⁷Li, ⁶Li)¹⁷O Q_m = -3.106
(b) ¹⁶O(⁹Be, ⁸Be)¹⁷O Q_m = 2.478
(c) ¹⁶O(¹¹B, ¹⁰B)¹⁷O Q_m = -7.310

Reaction (a) has been studied at E(⁷Li) = 36 MeV [see (1982AJ01, 1986AJ04)] and more recently at E(⁷Li) = 34 MeV (1988KE07). For reaction (b) see (1979CU1A, 1985CU1A) and the measurements at E_cm = 10.3, 12.8 MeV reported by (1988JA14). See also (1988WE17). For reaction (c) see (1982AJ01).

39. (a) ¹⁶O(¹³C, ¹²C)¹⁷O Q_m = -0.803
(b) ¹⁶O(¹⁴N, ¹³N)¹⁷O Q_m = -6.410

For reaction (a) see (1982AJ01, 1986AJ04) and the cross section measurements at E_cm = 7.8, 14.6 MeV of (1986PA10). For reaction (b) see (1982AJ01).

40. ¹⁷N(β^-)¹⁷O Q_m = 8.680

The decay is principally to ¹⁷O*(4.55, 5.38, 5.94): see 17.5 (in PDF or PS).

41. (a) ¹⁷O(γ, n)¹⁶O Q_m = -4.413
(b) ¹⁷O(γ, 2n)¹⁵O Q_m = -19.806
(c) ¹⁷O(γ, p)¹⁶N Q_m = -13.780

Monoenergetic photons with E_γ = 8.5 to 39.7 MeV have been used to measure the (γ, n) and the (γ, 2n) [above 10 MeV] cross sections. The giant dipole resonance, 6 MeV broad, is centered at 23 MeV; a pigmy resonance is also observed at 13 MeV. The pigmy resonance [J^π = 3/2^-] decays primarily to ¹⁶O_g.s., (1986AJ04), and the work of (1985JU02) indicates that above E_x ≈ 17 MeV nearly all of the decay is to excited states of ¹⁶O. See, however, the experimental results of (1989OR07), which determine that the neutron emission from the ¹⁷O GDR to ¹⁶O is primarily to the ground state with ≈ 4% going to the 6.13 MeV 3^- level. Four resonances have been inferred at E_x = 10.5, 14.0, 16.6 and 21.0 MeV with J^π = 5/2^-, 3/2^-, 7/2^-, and 7/2^- respectively (1985JU02). Recent work of (1990MC06) reanalyzes earlier data and reports that the ¹⁷O levels at E_x = 14.4, 15.2 and 15.6 MeV should be assigned T = 1/2. Most of the GDR strength decays to T = 1 states in ¹⁶O: this implies a T = 3/2 assignment for the main part of the GDR (1986AJ04). A broad structure, of T = 1/2 nature, with 28 < E_x < 36 MeV is also reported (1980JU01). For radiative widths see 17.13 (in PDF or PS) in (1982AJ01). Measurements of bremsstrahlung-weighted integral cross sections for reaction (c) carried out by (1989OR07) indicated that 90% of the photoproton emission to ¹⁶N populates the ground state (2^-) and the 0.298 MeV (3^-) levels. More recently, the GDR was studied with reaction (c) using quasimonoenergetic photons from E_γ = 13.5 to 43.15 MeV (1992ZU01). Major peaks were observed at E_γ = 15.1, 18.1, 19.3, 20.3, 22.2, 23.1, 24.4 and ≈ 26.5 MeV.

Comparisons of ¹⁷O photonuclear data with shell model and continuum shell model calculations are discussed in (1987KI1C).

42. ¹⁷O(e, e)¹⁷O

The ¹⁷O charge radius is reported to be < r² >_1/2 = 2.710 ± 0.015 fm (1978KI01). The r.m.s. radius of the 1d_5/2 neutron orbit deduced from the data is 3.56 ± 0.09 fm (1982HI01). The elastic magnetic form factor was measured for 2.47 ≤ q_eff ≤ 3.65 fm^-1 by (1988KA08). Inelastic scattering is reported to a number of ¹⁷O states: see 17.18 (in PDF or PS) and 17.19 (in PDF or PS). Excited states in ¹⁶O up to E_x = 15 MeV were studied in high resolution at q = 0.8 - 2.6 fm^-1 by (1987MA52). Recent form-factor measurements for momentum transfers q = 1.4 - 1.9 fm^-1 at 90° and q = 1.7 fm^-1 at 160°, for levels between E_x = 15 and 27 MeV, were reported by (1986MA48). See also footnote ^e in 17.10 (in PDF or PS). Note, however, the comments by (1987MI25) and reply by (1987MA40) concerning the spin assignments of (1986MA48). See also (1986AJ04) and reaction 50.

Calculations of charge and magnetic form factors in a consistent relativistic formalism are described in (1986KI10, 1986WA1D, 1991BL14). See also (1989FU05). Excitation energies, magnetic moments and M2 magnetic ground state transitions for five T = 3/2 excited states were calculated in a microscopic 2p-1h model by (1986TO13). Nuclear currents and amplitudes for elastic magnetic scattering in a relativistic mean-field theory were studied by (1987FU06, 1988FU04). A relativistic direct-interaction-based impulse approximation model is discussed in (1989GA04).

Model dependence of r.m.s. radii as determined from elastic magnetic form factors was studied by (1991CO12). See also (1991GO1F, 1991GO1G, 1992GO07). See also the study by (1992BO07) of ¹⁷O(e, e'n)¹⁶O as a tool for investigation of the role of two-body currents in quasi-free electron scattering.

43. ¹⁷O(π^±, π^±)¹⁷O

At E_π^± = 164 MeV angular distributions to ¹⁷O*(3.85, 4.55, 5.22, 5.69, 7.76, 8.1, 8.4, 15.7, 17.1) have been analyzed by DWBA. Evidence is suggested for E2 strength near 8 MeV and for M4 strength to the two states at E_x = 15.7 and 17.1 MeV (1984BL17). [See, however, caveat on p. 1990 of that reference, and the density of states above E_x = 5 MeV in 17.10 (in PDF or PS).]

44. ¹⁷O(n, α)¹⁴C Q_m = 1.818

Cross sections were measured for thermal energies to E_n ≈ 1 MeV by (1991KO31). This reaction plays a role in the nucleosynthesis of heavy elements in nonstandard Big-Bang models. See also (1991KO1P).

45. (a) ¹⁷O(p, p)¹⁷O
(b) ¹⁷O(d, d)¹⁷O

Angular distributions for the elastic scattering have been reported for E_p = 8.6 to 65.8 MeV and E_d = 18 MeV: see (1982AJ01). Analyzing power measurements for E_p = 89.7 MeV are reported in (1985VO12). For reaction (a) see also ¹⁸F in (1983AJ01, 1987AJ02).

A coupled-channels variational-method calculation has been applied to reaction (a) and is discussed in (1986KA1A).

46. (a) ¹⁷O(³He, ³He)¹⁷O
(b) ¹⁷O(α, α)¹⁷O

Elastic angular distributions have been measured at E(³He) = 11.0 and 17.3 MeV [see (1977AJ02)], and at 14 MeV (1982AB04). Analyzing powers were measured at E(³He) = 33.3 MeV [see (1986AJ04); also A_y to ¹⁷O*(0.87)]. For reaction (b) see (1982AJ01, 1986AJ04). More recently, differential cross sections were measured at E_α = 54.1 MeV (1987AB03).

Microscopic spin-orbit potentials for polarized ³He scattering on ¹⁷O have been calculated (1987CO07) by a double folding model.

47. (a) ¹⁷O(⁹Be, ⁹Be)¹⁷O
(b) ¹⁷O(¹⁰B, ¹⁰B)¹⁷O

Fusion cross section measurements for reaction (b) are reported by (1982CH07). See also (1982AJ01, 1986AJ04).

48. (a) ¹⁷O(¹²C, ¹²C)¹⁷O
(b) ¹⁷O(¹³C, ¹³C)¹⁷O
(c) ¹⁷O(¹⁴C, ¹⁴C)¹⁷O

Elastic angular distributions (reactions (a) and (b)) have been reported at E(¹⁷O) = 30.5 to 33.8 MeV [see (1982AJ01)] and at E(¹⁷O) = 40 to 70 MeV (1986FR04; also ¹⁷O*(0.87)) and 85.4, 120 and 140 MeV (1982HE07). See also the comparison of reaction (a) with ¹⁶O + ¹³C by (1989FR04). For fusion cross section and yield measurements see (1982AJ01, 1986AJ04).

Results of a barrier-penetration calculation for these reactions is discussed in (1986HA13). The energy dependence of nucleus-nucleus potentials is explored in (1987BA01). Molecular single-particle effects are studied in an asymmetric two-center shell model in (1987MO27). See also (1988MI25). The origin of the resonant structure in reaction (b) is treated in (1988FR15). The nuclear Landau-Zener effect in reaction (a) is discussed in (1988TH02, 1988THZZ). Some features in inelastic scattering angular distributions that had been attributed to the existence of nucleon promotion are explained in terms of DWBA calculations by (1987VO05).