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GENERAL: See also (74AJ01) and Table 8.11 [Table of Energy Levels] (in PDF or PS).

Nuclear models:(KH75C).

Special states:(IR74A, IR76C, KH78).

Electromagnetic interactions:(KU74D, KU76G).

Special reactions:(BA74U, BE76DD, WE76E, WE77, YA77D).

Pion and kaon reactions:(CA73K, JU77B).

Astrophysical questions:(BA73WW, DE73BB, TR73I, DA74G, BA76, BA77SS, SC77N).

Other topics:(IR74A, KH75C, IR76C, TR77, RO78A).

Ground state properties:(SH74K, BE75Q, FU76H).

1. 8B(β+)8Be

Qm = 17.980

The β⁺ decay leads mainly to ⁸Be*(2.9). The mean of half-lives listed in (74AJ01) is 770 ± 3 msec; log ft = 5.64 (BA66A). There is also a branch to a ⁸Be state at ~ 16.6 MeV; log ft = 2.9 (MA64D), 3.33 (BA69A). See reaction 29 in ⁸Be. See (TR73J, BA74Z, CL74C, UL74A, VA74J, UL75, HA77E) for astrophysical considerations.

2. 6Li(3He, n)8B

Qm = -1.975

Angular distributions for the n₀ group have been reported at E(³He) = 4.8 to 5.7 MeV. The appearance of a forward peak indicates an L = 0 transfer and hence a knockout mechanism (L = 0 is forbidden for simple diproton stripping) (VA67J). The first excited state is at 767 ± 12 (FA65B), 783 ± 10 keV (MC65E: Γ = 40 ± 10 keV). See also (66LA04) and ⁹B.

3. 7Be(p, γ)8B

Qm = 0.137

Absolute cross sections have been measured for E_p = 0.165 to 10.0 MeV [see (74AJ01)] and at E_p = 0.36 MeV (WI77D). A resonance at E_p = 724 keV [⁹B*(0.77)] with Γ_lab ~ 46 keV [σ_peak = 2.20 ± 0.22 μb, Γ_γ = 50 ± 25 meV] is reported by (PA66K, KA72H).

The zero-energy cross-section factor S(0) = 0.032 ± 0.003 keV · b, dS/dE = -3 x 10^-5 b ((KA72H) and P.D. Parker, private communication). The change in the S-value is due to a remeasurement of the ⁷Li(d, p) cross section: see ⁹Be. See also (74AJ01, WI77D). The relevance of this reaction to astrophysics is discussed by (BA71VV, BA73WW, VA74J, HO74E). See also (74AJ01, LO74F).

4. 9Be(p, 2n)8B

Qm = -20.428

See (DA74G) and ¹⁰B.

5. 10B(π+, d)8B

Qm = 115.563

The ground state tranisition has been studied at E_π⁺ = 50 MeV (AM77B).

6. 10B(p, t)8B

Qm = -18.531

At E_p = 49.5 MeV angular distributions have been measured for the tritons to ⁸B*(0, 2.32) (SQ70): L = 2 and L = 0 + 2, leading to J^π = 2⁺ and 3⁺, respectively. See also ¹⁰B(p, ³He)⁸Be. The energy of the excited state is 2.29 ± 0.05 MeV (SQ70), 2.34 ± 0.04 MeV (BR68I): Γ_lab = 390 ± 40 keV (MC67K). ⁸B*(0.78) is also observed.

7. 10B(6Li, 8Li)8B

Qm = -17.730

See (WE76E, WE77) and ⁸Li.

8. 11B(3He, 6He)8B

Qm = -16.917

At E(³He) = 50 MeV, ⁶He groups are observed to the first three states of ⁸B (MC67K). At E(³He) = 72 MeV the first T = 2 state is observed at E_x = 10.619 ± 0.009 MeV, Γ < 60 keV: dσ/dΩ(lab) = 190 nb/sr at θ_lab = 9°. No other states are observed within 2.4 MeV of this state (RO75).

9. 12C(3He, 7Li)8B

Qm = -22.899

This reaction has been studied at E(³He) = 40.7 MeV (DE71U). See also (PA75I).

10. 12C(α, 8Li)8B

Qm = -41.444

See (MC68B).

11. 13C(3He, 8Li)8B

Qm = -25.812

See (BE76T).