A=10B (1984AJ01)

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¹⁰B (1984AJ01)

(See Energy Level Diagrams for ¹⁰B)

GENERAL: See also (1979AJ01) and Table 10.5 [Table of Energy Levels] (in PDF or PS).

Shell and deformed models: (1978FU13, 1979FL06, 1979KU05, 1980NI1F, 1981BO1Y, 1981DE2G, 1982BA52).

Cluster and α-particle models: (1979AD1A, 1980FU1G, 1980NI1F, 1980OKZZ, 1981KR1J, 1983RO1G).

Special states: (1979FL06, 1980BR21, 1980FU1G, 1980NI1F, 1980OKZZ, 1980RI06, 1981BA64, 1981BO1Y, 1981DE2G, 1981KU04, 1981SE06, 1982BA52, 1983GO1R).

Electromagnetic tranisitions and giant resonances: (1978FU13, 1979FL06, 1979KU05, 1980KO1L, 1980NI1F, 1980RI06, 1981BA64, 1981BO1Y, 1981KN06, 1982BA52, 1982RI04, 1982VE11).

Astrophysical questions: (1978BU1B, 1979MO04, 1979RA1C, 1980RE1B, 1981AU1D, 1981AU1G, 1981GU1D).

Applied work: (1979AT01, 1979FL1A, 1979FO1F, 1979JUZU, 1980MU1D, 1983ST1H).

Complex reactions involving ¹⁰B: (1978BH03, 1978HE1C, 1979AL22, 1979BO22, 1979JA1C, 1979LO11, 1979SA27, 1979ST1D, 1979VI05, 1980GR10, 1980GU1E, 1980MI01, 1980OL1C, 1980RI06, 1980WI1L, 1981BL1G, 1981ME13, 1981MO20, 1981TA22, 1981VA1D, 1982CH1M, 1982FU04, 1982GO1E, 1982LU01, 1982LY1A, 1982MO1K, 1982VE11, 1983BE02, 1983SA06).

Muon and neutrino capture and reactions: (1979BE1N, 1979DE01, 1979GO1M, 1980MU1B, 1981GI08, 1981MU1E, 1981OL01, 1982NA01).

Pion and kaon capture and reactions (See also reactions 23, 24 and 47.): (1978AN20, 1978DA1A, 1978TS1A, 1979AL1J, 1979AL21, 1979BA16, 1979BE1N, 1979BO1P, 1979BO1N, 1979PI06, 1979TI1A, 1979TR1B, 1980CR03, 1980DE11, 1980LE02, 1980MA1F, 1980NA1B, 1980ST25, 1981BE63, 1981FR17, 1981GE1B, 1981GI15, 1981SI1D, 1981ST05, 1981YA1A, 1982RO04).

Hypernuclei: (1978DA1A, 1978PO1A, 1978SO1A, 1980IW1A, 1981WA1J, 1982ER1E, 1982KO11, 1982RA1L).

Other topics: (1980BR21, 1981AV02, 1981KU04, 1981SE06, 1982BA2G, 1982CH1M, 1982DE1N, 1982NG01, 1982VE02, 1983GO1R).

Ground-state properties of ¹⁰B: (1978HE1D, 1979BE1N, 1979SA27, 1980FU1G, 1981AV02, 1981BO1Y, 1981OL01, 1981SE06, 1982BA2G, 1982LO13, 1982NG01).

μ = +1.80065 ± 0.00001 nm: see (1978LEZA).

Q = +84.72 ± 0.56 mb: see (1978LEZA).

Mass of ¹⁰B: A.H. Wapstra (private communication) adopts 12050.0 ± 0.39 keV and we shall too. See also (1983CH08).

¹⁰B*(0.72): μ = +0.63 ± 0.12 nm: see (1978LEZA). See also (1982VE11).

1. ⁶Li(α, γ)¹⁰B Q_m = 4.4603

Observed resonances are displayed in Table 10.8 (in PDF or PS). See also (1981GA1A, 1981MU1F).

2. (a) ⁶Li(α, n)⁹B Q_m = -3.977 E_b = 4.4603
(b) ⁶Li(α, p)⁹Be Q_m = -2.1262
(c) ⁶Li(α, d)⁸Be Q_m = -1.5671

The excitation functions for neutrons [from threshold to E_α = 15.5 MeV] and for deuterons [E_α = 9.5 to 25 MeV; d₀, d₁ over most of range] do not show resonance structure. See also ⁹B, ⁹Be and ⁸Be. For reaction (a) see also (1979BA48). See (1979AJ01) for references.

3. (a) ⁶Li(α, α)⁶Li E_b = 4.4603
(b) ⁶Li(α, 2α)²H Q_m = -1.4753

Excitation functions of α₀ and α₁ have been reported for E_α ≤ 18.0 MeV and 9.5 to 12.5 MeV, respectively: see (1974AJ01). Reported anomalies are displayed in Table 10.9 (in PDF or PS). Elastic scattering and VAP measurements are reported for E_d-bar = 15.1 to 22.7 MeV (1979EG01). Small anomalies are observed in the excitation function of the magnitude parameter (reaction (b)) corresponding to ¹⁰B*(8.67, 9.65, 10.32, 11.65) (1983GO07). See, however, Table 10.5 (in PDF or PS). See also ⁶Li, (1980SK1A) and (1979NO1C, 1979SU09, 1979SU1F, 1980FU1G, 1982LE10, 1983SH04; theor.).

4. ⁶Li(⁶Li, d)¹⁰B Q_m = 2.985

Angular distributions of deuteron groups have been determined at E(⁶Li) = 2.4 to 9.0 MeV (d₀, d₁, d₃) and 7.35 and 9.0 MeV (d₄, d₅). The d₂ group is also observed but its intensity is weak: see (1974AJ01) and ¹²C in (1980AJ01). See also (1979WA13).

5. ⁶Li(⁷Li, t)¹⁰B Q_m = 1.992

Angular distributions of the t₀ and t₁ groups have been measured at E(⁶Li) = 3.3 MeV and E(⁷Li) = 3.78 to 5.95 MeV: see (1974AJ01).

6. ⁷Li(³He, γ)¹⁰B Q_m = 17.7880

Capture γ-rays have been observed for E(³He) = 0.8 to 6.0 MeV. The γ₀ and γ₅ yields [to ¹⁰B*(0, 4.77)] show resonances at E(³He) = 1.1 and 2.2 MeV [E_res = 0.92 and 2.1 MeV], the γ₁ and γ₄ yields [to ¹⁰B*(0.72, 3.59)] at 1.4 MeV and the γ₄ yield at 3.4 MeV: see Table 10.10 (in PDF or PS). Both the 1.1 and 2.2 MeV resonances [¹⁰B*(18.4, 19.3)] appear to result from s-wave capture; the subsequent decay is to two 3⁺ states [¹⁰B*(0, 4.77)]. Therefore the most likely assignment is 2^-, T = 1 for both [there appears to be no decay of these states via α₂ to ⁶Li*(3.56) which has J^π = 0⁺, T = 1: see reaction 10]. The assignment for ¹⁰B*(18.8) [1.4 MeV resonance] is 1⁺ or 2⁺ but there apprears to be α₂ decay and therefore J^π = 2⁺. ¹⁰B*(20.2) [3.4 MeV resonance] has an isotropic angular distribution of γ₄ and therefore J^π = 0⁺, 1^-, 2^-. The γ₂ group resonates at this energy which eliminates 2^-, and 0⁺ is eliminated on the basis of the strength of the transition which is too large for E2. See (1974AJ01) for references.

7. ⁷Li(³He, n)⁹B Q_m = 9.351 E_b = 17.7880

The excitation curve is smooth up to E(³He) = 1.8 MeV and the n₀ yield shows resonance behavior at E(³He) = 2.2 and 3.25 MeV, Γ_lab = 270 ± 30 and 500 ± 100 keV. No other resonances are observed up to E(³He) = 5.5 MeV. See Table 10.10 (in PDF or PS) and (1974AJ01) for references.

8. ⁷Li(³He, p)⁹Be Q_m = 11.2015 E_b = 17.7880

The yield of protons has been measured for E(³He) = 0.60 to 4.8 MeV: there is some indication of weak maxima at 1.1, 2.3 and 3.3 MeV. Polarization measurements are reported at E(³He) = 14 MeV, and more recently at E(³He) = 13.6 - 13.7 MeV (1981SL03) and 14.01 MeV (1983RI01). See also (1981VI1B). For the earlier references see (1974AJ01, 1979AJ01).

9. (a) ⁷Li(³He, d)⁸Be Q_m = 11.7606 E_b = 17.7880
(b) ⁷Li(³He, t)⁷Be Q_m = -0.881
(c) ⁷Li(³He, ³He)⁷Li

Yields of deuterons have been measured for E(³He) = 1.0 to 2.5 MeV (d₀) and yields of tritons are reported for 2.0 to 4.2 MeV (t₀): a broad peak is reported at E(³He) ≈ 3.5 MeV in the t₀ yield. See (1979AJ01) for references. Polarization measurements are reported at E(pol. ³He) = 33.3 MeV for the deuteron groups to ⁸Be*(16.63, 17.64, 18.15) (1981BA38) and for the triton and ³He groups to ⁷Be*(0, 0.43) and ⁷Li*(0, 0.48, 4.63) (1981BA37). See also (1979KA1G).

10. ⁷Li(³He, α)⁶Li Q_m = 13.328 E_b = 17.7880

Excitation functions have been measured for E(³He) = 1.3 to 18.0 MeV: see (1974AJ01). The α₀ group (at 8°) shows a broad maximum at ≈ 2 MeV, a minimum at 3 MeV, followed by a steep rise which flattens off between E(³He) = 4.5 and 5.5 MeV. Integrated α₀ and α₁ yields rise monotonically to 4 MeV and then tend to decrease. Angular distributions give evidence of the resonances at E(³He) = 1.4 and 2.1 MeV seen in ⁷Li(³He, γ)¹⁰B: J^π = 2⁺ or 1^-, T = (1) for both [see, however, reaction 6]: Γ_α is small. The α₂ yield [to ⁶Li*(3.56), J^π = 0⁺, T = 1] shows some structure at E(³He) = 1.4 MeV and a broad maximum at ≈ 3.3 MeV: see Table 10.10 (in PDF or PS). Recent (unpublished) excitation studies have been reported at E(³He) = 0.6 to 2.5 MeV for the α₀, α₁, α₂ and α₄ groups: the α₄ group shows possible resonances at E(³He) = 1.45 and 2.15 MeV. J^π = 2⁺; T = 1 is suggested for the lower structure (1979LIZT, 1980LI1F). Polarization measurements are reported at E(pol. ³He) = 33.3 MeV to ⁶Li*(0, 2.19, 3.56) (1981BA38).

11. ⁷Li(α, n)¹⁰B Q_m = -2.7898

Angular distributions have been measured for E_α = 4.78 to 13.9 MeV [see (1974AJ01)] and more recently for E_α = 4.4 to 5.1 MeV (1981SE04). See also (1979AJ01).

12. ⁹Be(p, γ)¹⁰B Q_m = 6.5865

Parameters of observed resonances are listed in Tables 10.11 (in PDF or PS) and 10.12 (in PDF or PS). Table 10.6 (in PDF or PS) summarizes the γ-transitions from this and other reactions. For references to the discussion below, see (1974AJ01, 1979AJ01).

The E_p = 0.32 MeV resonance (¹⁰B* = 6.87 MeV) is ascribed to s-wave protons because of its comparitively large proton width [see ⁹Be(p, p)] and because of the isotropy of the γ-radiation. The strong transition to ¹⁰B*(1.74) requires E1 and hence J^π = 1^-, T = 0. T = 0 is also indicated by the large deuteron width. On the other hand, the strength of E1 transitions to ¹⁰B*(0.7, 2.1) indicates T = 1. The amplitudes for the T = 0 and T = 1 parts of the wave function for ¹⁰B*(6.87) are 0.92 and 0.39, respectively. See (1982RI04) for the 5.16 → 1.74 decay (Table 10.6 (in PDF or PS)).

The proton-capture data near E_p = 1 MeV appears to require at least five resonant states, at E_p = 938, (980), 992, 1083 and 1290 keV. The narrow E_p = 1083 keV level (¹⁰B*=7.56 MeV) is formed by p-wave protons, J^π = 0⁺ [see ⁹Be(p, p), ⁹Be(p, α)]. The isotropy of the γ-rays supports this assignment. The strong M1 transitions to J^π = 1⁺; T = 0 levels at 0.72, 2.15 and 5.18 MeV (Table 10.12 (in PDF or PS)) indicate T = 1. The width of ¹⁰B*(5.18) observed in the decay is 100 ± 10 keV.

The excitation function for the ground-state radiation shows resonance at E_p = 992 (Γ = 80 keV) and 1290 keV (Γ = 230 keV). Elastic scattering studies indicate s-wave formation and J^π = 2^- for both. For the lower level (E_x = 7.48 MeV) the intensity of the g.s. capture radiation, Γ_γ = 25 eV indicates E1 and T = 1. The angular distribution of γ-rays, 1 + 0.1sin²θ, is consistent with s-wave formation with some d-wave admixture or with some contribution from a nearby p-wave resonance; possibly a J^π = 2⁺ level at E_p = 980 keV.

The angular distribution of ground-state radiation at E_p = 1330 keV is isotropic and Γ_γ = 8.5 eV, supporting E1, T = 1 for this level (E_x = 7.75 MeV).

Transitions to ¹⁰B*(0.7) [γ₁] show resonances at E_p = 992, 1290 and 938 keV, Γ = 155 keV. The latter is presumably also a resonance for (p, d) and (p, α). An assignment of J^π = 2^-, T = 0 is consistent with the data, although the E1 radiation then seems somewhat too strong for a ΔT = 0 transition.

A resonance for capture radiation at E_p = 2.567 ± 0.003 (E_x = 8.895 MeV) has a width of 40 ± 2 keV and decays mainly via ¹⁰B*(0.7) (unpublished Ph.D. thesis). It appears from the width that this resonance corresponds to that observed in ⁹Be(p, α), J^π = 2⁺, T = 1 and not to the ⁹Be(p, n) resonance at the same energy. A further resonance is reported at E_p = 4.72 ± 0.01 MeV, Γ ≈ 0.5 MeV.

In the range E_p = 4 to 18 MeV, the γ₀ yield at 90° shows the resonance at E_p = 4.7 MeV (E_x = 10.7 MeV) and shows fluctuations suggesting states at E_x ≈ 14.6, 15.6 and 19.7 MeV. It is suggested that ¹⁰B*(19.7) decays via E1 and therefore J^π = 2^-, 3^-, 4^-. The other three states presumably decay by M1 and therefore J^π = 2⁺, 3⁺, 4⁺. These fluctuations appear on a nearly constant γ₀ yield with a 90° differential cross section ≈ 1.5 μb/sr. The average yield of γ₁ is ≈ 2/3 of the γ₀ yield. The broad giant resonance peak is centered at E_x ≈ 14.5 MeV. Fluctuations in the γ₁ yield are reported at E_x ≈ 12.6, 13.3 and 14.1 MeV. These states presumably decay by M1 to ¹⁰B*(0.7) [J^π = 1⁺] and therefor J^π_i = 0⁺, 1⁺, 2⁺. The weak γ₂ yield (to ¹⁰B*(1.74) [J^π; T = 0⁺; 1]) seems to exhibit a broad peak centered near E_x = 15 MeV (maximum 90° differential cross section ≈ 0.5 μb/sr) and possibly some structure near E_x = 20 MeV. The γ₃ yield (to ¹⁰B*(2.15) [J^π = 1⁺]) increases to ≈ 0.4 μb/sr at E_x ≈ 16 MeV and seems to remain constant beyond that energy, with some suggestion of a fluctuation corresponding to E_x ≈ 12.9 MeV. ¹⁰B*(12.9) appears to have positive parity. Angular distributions of γ₀, γ₁, γ₂ and γ₃ are also reported (unpublished Ph.D. thesis).

The magnetic moment of ¹⁰B*(0.72) has been studied via γ-γ correlations from ¹⁰B*(7.56): g = +0.63 ± 0.12.

13. ⁹Be(p, n)⁹B Q_m = -1.851 E_b = 6.5865

Resonances in the neutron yield occur at E_p = 2562 ± 6, 4720 ± 10 and, possibly, at 3500 keV with Γ_c.m. = 84 ± 7, ≈ 500 and ≈ 700 keV. These three resonances correspond to ¹⁰B*(8.891, 10.83, 9.7): see Table 10.13 (in PDF or PS) in (1974AJ01). Cross-section measurements for the (p, n) and (p, n₀) reactions have been obtained by (1983BY01; E_p = 8.15 to 15.68 MeV) [see also for a review of earlier work]. They indicate possible structure in ¹⁰B near 13 - 14 MeV (1983BY01).

The E_p = 2.56 MeV resonances is considerably broader than that observed at the same energy in ⁹Be(p, α) and ⁹Be(p, γ) and the two resonances are believed to be distinct. The shape of the resonance and the magnitude of the cross section an be accounted for with J^π = 3^- or 3⁺; the former assignment is in better accord with ¹⁰Be*(7.37). For J^π = 3^-, θ²_n = 0.135, θ²_p = 0.115 (R = 4.47 fm): see (1974AJ01).

The analyzing power for n₀ has been measured for E_{pol. p} = 2.7 to 17 MeV (1980MA33, 1981BY1B, 1981BY1C, 1981MU1D), as has P^y near 8.1 MeV. See also (1983BY01). The polarization transfer coefficient has been studied for E_{pol. p} = 3.9 to 15.1 MeV by (1976LI08): negative values of K^y'_y(0) are reported near E_p = 7 MeV in a region where several states are known to exist in ¹⁰B; a spin-flip mechanism may also be involved. Polarization measurements are also reported at E_{pol. p} = 135 MeV (1981MA1J) and 800 MeV (1981RI06). See also ⁹B, (1979AJ01), (1979BA68), (1980WA1K, 1981WA1G, 1982BY1A) and (1978BA1F, 1981UL1B; applications).

14. (a) ⁹Be(p, p)⁹Be E_b = 6.5865
(b) ⁹Be(p, pn)⁸Be Q_m = -1.6655

The elastic scattering has been studied for E_p = 0.2 to 9.5 MeV [see (1974AJ01, 1979AJ01)] and (1980BO1L; E_p = 2.31 → 2.73 MeV; p₀). Below E_p = 0.7 MeV only s-waves are present exhibiting resonance at E_p = 330 keV [¹⁰B*(6.88)], J^π = 1^-. Between E_p = 0.8 to 1.6 MeV polarization and cross-section measurements are well fitted by a phase-shift analysis, using only the ³S₁, ⁵S₂, ⁵P₁ and ⁵P₂ phases. Four levels satisfy the data, 1⁺ and 2^- states at E_x = 7.48 MeV, a sharp 0⁺ state at E_x = 7.56 MeV, and a 1^- state at 7.82 MeV: see Table 10.13 (in PDF or PS). Pronounced minima at E_p = 2.48 and 2.55 are observed in the polarization (p₀): these are ascribed to T = 1 analogs of the 3^- and 2⁺ states ¹⁰Be*(7.37, 7.52). A strong anomaly is observed at E_p = 6.7 MeV: see Table 10.13 (in PDF or PS).

Polarization measurements have been reported at E_p = 0.9 to 49.8 MeV, at 138.2 and 145 MeV, and at 990 MeV [see (1974AJ01, 1979AJ01)] and at E_{pol. p} = 780 MeV (1982RA20) as well as at 1 GeV (1983BE16). See also ⁹Be. A_y and K^y_y have been measured at E_{pol. p} = 225 MeV (1981RO1M; p₀). Total reaction cross sections have been measured at eight energies in the range E_p = 225 to 557 MeV (1979SC07. Inclusive cross sections have been measured by (1979FR12, 1979KO21, 1980NI09). Polarization transfer parameters have been measured at E_p = 800 MeV (1981RI06). Hadron multiple production has been studied by (1978AR1J). For pion and kaon production at 400 GeV see (1980NI09). For reaction (b) see ⁹Be and (1982PE1F). See also (1981BA1R, 1981CO1D, 1981NA05, 1981WA1G, 1982BA2T, 1983SEZW), (1983LE28; astrophysics) and (1978BH1B, 1979BY01, 1979WE1C, 1981BO1C, 1981KR17, 1983BY01; theor.).

15. (a) ⁹Be(p, t)⁷Be Q_m = -12.082 E_b = 6.5865
(b) ⁹Be(p, ³He)⁷Li Q_m = -11.201

Polarization measurements (reaction (b)) are reported at E_{pol. p} = 23.06 MeV (1983RI01). See also (1979AR04, 1981BA1R, 1981SL03, 1983SEZW).

16. (a) ⁹Be(p, d)⁸Be Q_m = 0.5591 E_b = 6.5865
(b) ⁹Be(p, α)⁶Li Q_m = 2.126

Knowledge of the cross sections of these two reactions at low energies is of importance for power generation and astrophysical considerations. Absolute cross sections for the d₀ and α₀ groups have been measured for E_p = 28 to 697 keV with ± 5 - 6% uncertainty. The value of S_c.m.(E = 0) for the combined cross sections is estimated to be 35⁺⁴⁵_-15 MeV · b. At the 0.33 MeV resonance (J^π = 1^-), σ_α₀ = 360 ± 20 mb and σ_d₀ = 470 ± 30 mb. The data (including angular distributions), analyzed by an R-matrix compound nucleus model, were fitted by assuming three states at E_p(c.m.) = -20 keV (J^π = 2⁺; 3⁺ possible) [E_x = 6.57 MeV] [see, however, Table 10.9 (in PDF or PS)], 310 keV (1^-) and 410 keV (1⁺; 2⁺ or 3⁺ possible) (1973SI27).

Measurements of excitation functions for deuterons and α-particles have been reported at a number of energies to E_p = 15 MeV: see (1974AJ01, 1979AJ01), Observed resonances are displayed in Table 10.14 (in PDF or PS).

Polarization measurements have been made in the range E_p = 0.30 to 15 MeV and at 185 MeV: see (1974AJ01, 1979AJ01). See also ⁶Li, ⁸Be and (1979AR04, 1983SEZW).

17. ⁹Be(d, n)¹⁰B Q_m = 4.3620

Neutron groups are observed corresponding to the ¹⁰B states listed in Table 10.15 (in PDF or PS). Angular distributions have been measured for E_d = 0.5 to 16 MeV: see (1974AJ01, 1979AJ01). Observed γ-transitions are listed in Table 10.16 (in PDF or PS) of (1979AJ01). See Tables 10.6 (in PDF or PS) and 10.7 (in PDF or PS) here for the parameters of radiative transitions and for τ_m.

From all the various experiments the following picture emerges: the first five states of ¹⁰B have even parity [from l_p]. The ground state is known to have J = 3, by direct measurement, and ¹⁰B*(1.74) has J^π = 0⁺ and is the T = 1 analog of the ¹⁰C_g.s. [from the β⁺ decay of ¹⁰C]. Then looking at the branching ratios and lifetimes of the other states, the sequence for ¹⁰B*(0, 0.72, 1.74, 2.15, 3.59) is J^π = 3⁺, 1⁺, 0⁺, 1⁺, 2⁺ [see discussion in (1966LA04, 1966WA10)].

For polarization measurements see (1981BR1E) and ¹¹B in (1980AJ01, 1985AJ01). See also (1977BA1L, 1978PL1B) and (1978BA1F, 1979WA1F, 1982OV1A, 1982SM1F; applications).

18. ⁹Be(³He, d)¹⁰B Q_m = 1.0930

Deuteron groups have been observed to a number of states of ¹⁰B: see Table 10.15 (in PDF or PS). Angular distributions have been reported at E(³He) = 10 to 25 MeV, at E(³He) = 33.3 MeV [see (1974AJ01, 1979AJ01)] and at E(³He) = 18 MeV (1980BL02). Spectroscopic factors obtained in the (d, n) and (³He, d) reactions are not in good agreement: see the discussions in (1974KE06, 1980BL02).

19. ⁹Be(α, t)¹⁰B Q_m = -13.2275

Angular distributions have been studied at E_α = 27, 28.3 and 43 MeV [see (1979AJ01)], at E_α = 30.1 MeV (1983VA1H; α₀, α₁, α₃, α₄) and at 65 MeV (1980HA33). In the latter experiment DWBA analyses have been made of the distributions to ¹⁰B*(0, 0.72, 1.74, 2.15, 3.59, 5.2, 5.92, 6.13, 6.56, 7.00, 7.5, 7.82, 8.9) and spectroscopic factors were derived. The distributions to ¹⁰B*(4.77, 6.03) could not be fitted by either DWBA or coupled-channel analyses. In general, coupled-channels calculations give a better fit to the 65 MeV data than does DWBA (1980HA33; see also for a comparison with the (d, n) and (³He, d) results). See also (1978ZE03; theor.).

20. ⁹Be(⁷Li, ⁶He)¹⁰B Q_m = -3.388

At E(⁷Li) = 34 MeV angular distributions have been obtained for the ⁶He ions to the first four states of ¹⁰B. Absolute values of the spectroscopic factors are S = 0.88, 1.38 (p_1/2 or p_3/2), 1.40 and 0.46 (p_1/2), 0.54 (p_3/2) for ¹⁰B*(0, 0.74, 1.74, 2.15) (FRDWBA analysis) (1977KE09).

21. ¹⁰Be(β^-)¹⁰B Q_m = 0.5568

See ¹⁰Be.

22. (a) ¹⁰B(γ, n)⁹B Q_m = -8.437
(b) ¹⁰B(γ, p)⁹Be Q_m = -6.5865
(c) ¹⁰B(γ, d)⁸Be Q_m = -6.0274
(d) ¹⁰B(γ, α)⁶Li Q_m = -4.4603

Absolute measurements have been made of the ¹⁰B(γ, Tn) cross section from threshold to 35 MeV with quasimonoenergetic photons; the integrated cross section is 0.54 in units of the classical dipole sum (60 NZ/A MeV · mb). The (γ, 2n) + (γ, 2np) cross section is zero, within statistics, for E_γ = 16 to 35 MeV (1976KN04). The giant resonance is broad with the major structure contained in two peaks at E_x = 20.1 ± 0.1 and 23.1 ± 0.1 MeV (σ_max ≈ 5.5 mb for each of the two maxima). For reaction (b) see (1974AJ01); for reactions (c) and (d) see (1959AJ76, 1966LA04). See also (1978DI1A, 1979TA1C) and (1981KE16, 1983GO1T; theor.).

23. (a) ¹⁰B(e, e)¹⁰B
(b) ¹⁰B(e, en)⁹B Q_m = -8.437
(c) ¹⁰B(e, ep)⁹Be Q_m = -6.5865
(d) ¹⁰B(e, eπ⁺)¹⁰Be Q_m = -140.124

Inelastic electron groups are displayed in Table 10.16 (in PDF or PS) (1979AN08). For reactions (b) and (c) see (1978SH14); for reaction (c) see (1978NA05); for reaction (d) see ¹⁰Be (1982ZU03). See also (1979AJ01, 1979TI1A, 1979TR1B) and (1978BO09, 1978FU13, 1981KE15; theor.).

24. ¹⁰B(π^±, π^±)¹⁰B

See (1981GE1B).

25. ¹⁰B(n, n')¹⁰B

Angular distributions have been studied for E_n = 1.5 to 14.1 MeV: see (1974AJ01, 1979AJ01). See also ¹¹B in (1985AJ01), (1979GLZY, 1981DAZZ) and (1979GLZV; theor.).

26. (a) ¹⁰B(p, p')¹⁰B
(b) ¹⁰B(p, 2p)⁹Be Q_m = -6.5865

Angular distributions have been measured for E_p = 3.0 to 49.5 MeV [see (1974AJ01, 1979AJ01)] and at 6.0 (1977SA1B) and 800 MeV (1979MO1E). Table 10.17 (in PDF or PS) displays the states observed in this reaction. The earlier γ-decay results are presented in (1979AJ01) and in Table 10.6 (in PDF or PS) here. See also ¹¹C in (1985AJ01), (1980FA07, 1981HO13) and (1979GLZV, 1980KO1V; theor.). For reaction (b) see ⁹Be and (1974AJ01).

27. ¹⁰B(d, d')¹⁰B

Angular distributions have been reported at E_d = 4 to 28 MeV: see (1974AJ01, 1979AJ01). Observed deuteron groups are displayed in Table 10.17 (in PDF or PS). The very low intensity of the group to ¹⁰B*(1.74) and the absence of the group to ¹⁰B*(5.16) is good evidence of their T = 1 character: see (1974AJ01).

28. ¹⁰B(t, t)¹⁰B

Angular distributions of elastically scattered tritons have been measured at E_t = 1.5 to 3.3 MeV: see (1974AJ01).

29. ¹⁰B(³He, ³He')¹⁰B

Angular distributions have been measured at E(³He) = 4 to 32.5 MeV [see (1974AJ01, 1979AJ01)] and at 41 MeV (1980TR02; elastic) and 46.1 MeV (1979GO07). L = 2 gives a good fot to the distributions of ³He ions to ¹⁰B*(0.72, 2.15, 3.59, 6.03): derived β_L are shown in Table 10.19 (in PDF or PS) of (1979AJ01). See also Table 10.17 (in PDF or PS) here.

30. (a) ¹⁰B(α, α')¹⁰B
(b) ¹⁰B(α, 2α)⁶Li Q_m = -4.4603

Angular distributions have been measured for E_α = 5 to 56 MeV [see (1974AJ01, 1979AJ01)] and at E_α = 31.2 MeV (1981KO1U; α₀). ¹⁰B*(1.74) is not observed. S_α for ¹⁰B_g.s. = 0.16 (1976WO11).

Reaction (b) has been studied at E_α = 24 MeV [see (1979AJ01)] and at 700 MeV (1979DO04). Using a width parameter of 141 MeV/c, (1979DO04) find that the effective number of α + d clusters for ¹⁰B_g.s., n_eff = 1.19 ± 0.23; the results are very model dependent. See also (1978ZE03, 1981LA13; theor.).

31. (a) ¹⁰B(⁶Li, ⁶Li)¹⁰B
(b) ¹⁰B(⁷Li, ⁷Li)¹⁰B

Elastic scattering angular distributions have been studied at E(⁶Li) = 5.8 and 30 MeV and at E(⁷Li) = 24 MeV: see (1979AJ01).

32. ¹⁰B(⁹Be, ⁹Be)¹⁰B

Elastic scattering angular distributions have been reported at E(¹⁰B) = 20.1 and 30.0 MeV (1980BO14).

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

Elastic angular distributions (reaction (a)) have been studied at E(¹⁰B) = 8, 13 and 21 MeV. For yields and reaction (b) see (1979AJ01). See also (1979SH22) and (1978TA1B; theor.).

34. (a) ¹⁰B(¹²C, ¹²C)¹⁰B
(b) ¹⁰B(¹³C, ¹³C)¹⁰B

Elastic angular distributions have been measured at E(¹⁰B) = 18 and 100 MeV [see (1979AJ01)] for reaction (a) and at 18, 25, 32, 39 and 46 MeV for reaction (b) (1982MA20).For fusion measurements see (1979AJ01) and (1981MA18, 1982MA20). See also (1978VA1A, 1981DE13, 1982HA42; theor.).

35. ¹⁰B(¹⁴N, ¹⁴N)¹⁰B

Angular distributions are reported at E(¹⁰B) = 100 MeV [see (1979AJ01)] and at E(¹⁴N) = 73.9 and 93.6 MeV (1979MO14; to ¹⁰B*(0, 0.72, 2.15)). For fusion cross-section measurements see (1979AJ01) and (1980PA19, 1982BE54, HO82F, 1982HO1F, 1982OR02). See also (1978TA1B) and (1981AB1A; theor.).

36. (a) ¹⁰B(¹⁶O, ¹⁶O)¹⁰B
(b) ¹⁰B(¹⁷O, ¹⁷O)¹⁰B
(c) ¹⁰B(¹⁸O, ¹⁸O)¹⁰B

Elastic angular distribution (reaction (a)) have been studied at E(¹⁶O) = 15.0 to 32.5 MeV and at E(¹⁰B) = 100 MeV [see (1979AJ01)] as well as at E(¹⁰B) = 33.7, 41.6, 49.5 MeV 1980PA01 and 65.8 MeV (1977MO1A, 1979MO14). The ground-state quadrupole moment of ¹⁰B is observed to influence the scattering (1980PA01). The elastic scattering for reaction (c) has been studied at E(¹⁸O) = 20, 24 and 30.5 MeV: see (1974AJ01). For fusion cross-section measurements and excitation functions see (1979GO09, 1981THZY) for reaction (a) and (1980WI09, 1982CH07) for reaction (b). See also (1981ST1P) and (1979HU1B, 1980VA03, 1981VA1E, 1983CI08; theor.).

37. (a) ¹⁰B(¹⁹F, ¹⁹F)¹⁰B
(b) ¹⁰B(²⁰Ne, ²⁰Ne)¹⁰B

The elastic scattering has been investigated for E(¹⁹F) = 20 and 24 MeV [see (1974AJ01)] (reaction (a)) and for E(¹⁰B) = 65.9 MeV (1979MO14) (reaction (b)).

38. (a) ¹⁰B(²⁴Mg, ²⁴Mg)¹⁰B
(b) ¹⁰B(²⁵Mg, ²⁵Mg)¹⁰B

The elastic scattering for both reactions has been studied at E(¹⁰B) = 87.4 MeV (1982FU09).

39. (a) ¹⁰B(²⁷Al, ²⁷Al)¹⁰B
(b) ¹⁰B(²⁸Si, ²⁸Si)¹⁰B
(c) ¹⁰B(³⁰Si, ³⁰Si)¹⁰B

The elastic scattering for all three reactions has been studied at E(¹⁰B) = 41.6 and ≈ 50 MeV (1979PA09; also 33.7 MeV for reaction (b)). See also (1980GL03).

40. ¹⁰B(⁴⁰Ca, ⁴⁰Ca)¹⁰B

The elastic scattering angular distribution has been measured for E(¹⁰B) = 46.6 MeV (1980GL03).

41. ¹⁰C(β⁺)¹⁰B Q_m = 3.6488

The half-life of ¹⁰C is 19.255 ± 0.53 sec (1975HA45) [and see (1974AJ01, 1979AJ01)]: the decay is to ¹⁰B*(0.72, 1.74) with branching ratios of (98.53 ± 0.02)% and (1.465 ± 0.014)% and log ft = 3.047 for the transition to ¹⁰B*(0.72) and 3.492 ± 0.005 for that to the analog state, ¹⁰B*(1.74): see Table 10.20 (in PDF or PS) in (1979AJ01). The excitation energies of the two states are 718.32 ± 0.09 and 1740.16 ± 0.17 keV [E_γ = 718.29 ± 0.09 and 1021.78 ± 0.14 keV] (1969FR02). See (1979AJ01) for a further discussion of the decay. See also (1979DE15, 1979FE02, 1979KU05; theor.).

42. ¹¹B(γ, n)¹⁰B Q_m = -11.454

The intensities of the transitions to ¹⁰B*(3.59, 5.16) [T = 0 and 1, respectively] depend on the region of the giant dipole resonances in ¹¹B from which the decay takes place: it is suggested that the lower-energy region consists mainly of T = 1/2 states and the higher-energy region of T = 3/2 states: see ¹¹B in (1980AJ01). (1979BR1D) report observation of the 1.02 MeV line from the decay of ¹⁰B*(1.74). See also ¹¹B in (1985AJ01) and (1982GO03, 1983GO1T; theor.).

43. ¹¹B(p, d)¹⁰B Q_m = -9.230

Angular distributions of deuteron groups have been measured at several energies in the range E_p = 17.7 to 154.8 MeV: see (1979AJ01). The population of the first five states of ¹⁰B and ¹⁰B*(5.18(u), 6.04(u), 6.56, 7.5, 11.4 ± 0.2, 14.1 ± 0.2) is reported. For VAP measurements see (1982BU03) in ¹²C (1985AJ01).

44. ¹¹B(d, t)¹⁰B Q_m = -5.197

Angular distributions have been measured at E_d = 11.8 MeV (t₀ → t₃; l = 1; S = 1.88, 0.94, 1.35, 1.35, respectively): see (1974AJ01).

45. (a) ¹¹B(³He, α)¹⁰B Q_m = 9.124
(b) ¹¹B(³He, 2α)⁶Li Q_m = 4.663

Reported levels are displayed in Table 10.18 (in PDF or PS). Angular distributions have been measured at a number of energies between E(³He) = 1.0 and 33 MeV: see (1974AJ01). For the decay of observed states see Table 10.6 (in PDF or PS).

The αα angular correlations (reaction (b)) have been measured for the transitions via ¹⁰B*(5.92, 6.03, 6.13, 6.56, 7.00). The results are consistent with J^π = 2⁺ and 4⁺ for ¹⁰B*(5.92, 6.03) and require J^π = 3^- for ¹⁰B*(6.13). There is substantial interference between levels of opposite parity for the α-particles due to ¹⁰B*(6.56, 7.00): the data are fitted by J^π = 3⁺ for ¹⁰B*(7.00) and (3, 4)^- for ¹⁰B*(6.56) [the ⁶Li(α, α) results then require J^π = 4^-]. See however reaction 16, and see (1974AJ01) for the references.

46. ¹²C(γ, pn)¹⁰B Q_m = -27.4104

See (1982DO08), ¹²C in (1985AJ01) and (1981KH08; theor.).

47. ¹²C(π^±, π^±d)¹⁰B Q_m = -25.1858

At E_π⁺ = 180 MeV and E_π^- = 220 MeV, ¹⁰B*(0.72, 2.15) are populated (1981ST05). See also (1979EL12, 1982EL07).

48. (a) ¹²C(p, ³He)¹⁰B Q_m = -19.6923
(b) ¹²C(p, pd)¹⁰B Q_m = -25.1858

Angular distributions of ³He ions have been measured for E_p = 39.8, 51.9 and 185 MeV: see (1979AJ01). ¹⁰B*(0, 0.72, 1.74, 2.15, 3.59, 4.77, 5.16, 5.92, 6.56, 7.50, 8.90) are populated. For reaction (b) see (1981ER10; 670 MeV) and (1979AJ01). See also (1978GO14; theor.).

49. ¹²C(d, α)¹⁰B Q_m = -1.3391

Alpha groups have been observed to most of the known states of ¹⁰B below E_x = 7.1 MeV: see Table 10.23 (in PDF or PS) in (1974AJ01). Angular distributions have been measured for E_d = 5.0 to 40 MeV: see (1979AJ01). Single-particle S-values are 1.5, 0.5, 0.1, 0.1 and 0.3 for ¹⁰B*(0, 0.72, 2.15, 3.59, 4.77) (1976VA07; ZRDWBA). A study of the m_s = 0 yield at E_d-bar = 14.5 MeV (θ = 0°) leads to assignments of 3⁺, 2^- and (3⁺, 4^-) for ¹⁰B*(4.77, 5.11, 6.56) (1975KU15). VAP measurements are reported at E_d-bar = 52 MeV (1982MA25): see ¹⁴N in (1986AJ01).

The population of the isospin forbidden group to ¹⁰B*(1.74) [α₂] has been studied with E_d up to 30 MeV: see ¹⁴N in (1976AJ04). See also (1981JO02, 1982BA24; theor.).

50. ¹²C(α, ⁶Li)¹⁰B Q_m = -23.7105

Angular distributions have been reported at E_α = 42 and 46 MeV: see (1979AJ01). At E_α = 65 MeV, an investigation of the ⁶Li breakup shows that ¹⁰B*(0, 0.72, 2.16, 3.57, 4.77, 5.2, 5.9, 6.0) are involved (1978SA26).

51. ¹²C(¹⁰B, 3α)¹⁰B Q_m = -7.2747

See (1978BE1G).

52. (a) ¹²C(¹²C, ¹⁴N)¹⁰B Q_m = -14.9134
(b) ¹²C(¹⁴N, ¹⁶O)¹⁰B Q_m = -4.4495

Angular distributions (reaction (a)) involving ¹⁰B*(0, 0.7) have been studied at E(¹²C) = 49.0 to 75.5 MeV (1979CL06, 1980CO10) and 93.8 MeV (1979FU04). Angular distributions (reaction (b)) involving ¹⁰B*(0, 0.72, 2.15, 3.59) have been measured at E(¹⁴N) = 53 MeV [see (1979AJ01)] and 78.8 MeV (1979MO14; not to ¹⁰B*(3.59)).

53. ¹³C(p, α)¹⁰B Q_m = -4.0609

Angular distributions have been measured for E_p = 5.8 to 18 MeV and 43.7 and 50.5 MeV: see (1979AJ01). Polarization measurements are reported at E_{pol. p} = 65 MeV (1980KA03; p₀): see ¹⁴N in (1986AJ01).

54. ¹⁴N(p, pα)¹⁰B Q_m = -11.6115

See (1978GO14; theor.).

55. ¹⁴N(d, ⁶Li)¹⁰B Q_m = -10.136

At E_d = 80 MeV angular distributions are reported to ¹⁰B*(0, 0.72, 2.15, 3.59, 4.8, 6.04, 7.05, 8.68) (1979OE01; see for S_α).

56. ¹⁴N(³He, ⁷Be)¹⁰B Q_m = -10.024

At E(³He) = 41 MeV groups to ¹⁰B*(0, 0.72, 2.15, 3.59, 6.1) have been observed. The transition to ¹⁰B*(1.74) is very weak: see (1979AJ01).

57. ¹⁶O(¹⁴N, ²⁰Ne)¹⁰B Q_m = -6.877

At E(¹⁴N) = 76.2 MeV angular distributions involving ¹⁰B*(0, 0.7) are presented by (1979MO14).