
^{10}B (1979AJ01)(See Energy Level Diagrams for ^{10}B) GENERAL: See also (1974AJ01) and Table 10.5 [Table of Energy Levels] (in PDF or PS). Shell and deformed models: (1973BO1C, 1974BO29, 1974BO54, 1974BO1P, 1975DI04, 1977JA14). Cluster and αparticle models: (1976GA34, 1977NA20, 1977OK1C). Special levels: (1974BO29, 1974BO1P, 1974IR04, 1974NI1A, 1975DI04, 1976GA34, 1976IR1B, 1977BI1D, 1977JA14, 1977NA20). Electromagnetic transitions: (1974BO29, 1974BO54, 1974BO1P, 1974HA1C, 1974MU13, 1977BO1V, 1977DO06, 1977KO1N, 1977OK1C, 1978KI08). Astrophysical questions: (1973CO1B, 1973TI1A, 1973TR1B, 1973WE1D, 1974AU1A, 1974JA11, 1974RE1A, 1975ME1E, 1975TR1A, 1976AU1B, 1976AU1C, 1976BO1E, 1976CO1B, 1976EP1A, 1976HA1F, 1976RO12, 1976SI1C, 1976SI1D, 1976VI1A, 1977AU1B, 1977DW1A, 1977HA1L, 1977KO1L, 1977MA1H, 1977PR1D, 1977SC1D, 1977SI1D, 1977ST1J, 1977WE1D, 1978AU1C, 1978DW1A). Special reactions: (1974BA70, 1974FO22, 1974JA11, 1974LA18, 1975KU01, 1975RA21, 1976BU16, 1976CH28, 1976HI05, 1976LE1F, 1976MI13, 1976NA11, 1976OS04, 1976RA1C, 1976RO12, 1977AR06, 1977FO04, 1977KU1D, 1977SH1D, 1977ST1J, 1977YA1B, 1978BI08, 1978FA1D, 1978GE1C, 1978WE1E, 1978ZE02). Muon capture and reactions: (1973MU1B, 1974EN10, 1977BA1P, 1977CA1E, 1977DO06, 1977MU1A, 1978DE15). Pion capture and reactions: (1973GO41, 1974CA1G, 1974DA27, 1974DI20, 1974HU14, 1974LE12, 1974LI15, 1974TA18, 1975BA52, 1975GI1B, 1975HU1D, 1975RO1G, 1975VE05, 1976AS1B, 1976BA1R, 1974BO1U, 1976ED1A, 1976EN02, 1976GI01, 1976LI26, 1976RO14, 1976SH01, 1977AM1B, 1977BA2H, 1977BA51, 1977BA1Q, 1977BA2G, 1977BE1W, 1977DO06, 1977HO1B, 1977MA35, 1977PI1C, 1977SM06, 1977TE1A, 1977WA02, 1978BH01, 1978KI08, 1978PE1D). Kaon capture and reactions: (1973GO41, 1975TA1C, 1976DE1D, 1978AT01, 1978HE02). Applied topics: (1975MU1A, 1976HU05, 1976JO1A). Other topics: (1974IR04, 1974MU13, 1975KU01, 1976IR1B, 1976MA04, 1976MI1B). Ground state properties: (1974AD1C, 1974BO29, 1974DE1E, 1974EN10, 1974MU13, 1974SHYR, 1975BE31, 1975EP02, 1976FU06, 1977AN21, 1977MA35, 1977NA20, 1977PA25, 1978AN07, 1978ZA1D).
Q = +84.72 ± 0.56 mb (1978SH1E).
Observed resonances are displayed in Table 10.7 (in PDF or PS). See also (1974AJ01), (1977BI1D) and (1976BI10; theor.).
The excitation functions for neutrons [from threshold to E_{α} = 15.5 MeV (1963ME08)] and for deuterons [E_{α} = 9.5 to 11.4 MeV (1963BL20; d_{0}); 12 to 25 MeV (1974KO24, 1974LE14, 1976LE1K; d_{0}, d_{1})] do not show resonance structure. See also ^{9}B, ^{9}Be and ^{8}Be.
Excitation functions of α_{0} and α_{1} 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 10.8 (in PDF or PS). Polarization measurements are reported at E(^{6}Libar) = 21.3 and 22.8 MeV (1976EG1A, 1976KA1E). See also ^{6}Li, (1974AJ01, 1974LO1B) and (1975CL01, 1975CL1C, 1975RE1C, 1977BA1N; theor.).
Angular distributions of deuteron groups have been determined at E(^{6}Li) = 2.4 to 9.0 MeV (d_{0}, d_{1}, d_{3}) and 7.35 and 9.0 MeV (d_{4}, d_{5}) (1966KI09). The d_{2} group is also observed but its intensity is weak. See also (1974AJ01) and ^{12}C in (1975AJ02, 1980AJ01).
Angular distributions of the t_{0} and t_{1} groups have been measured at E(^{6}Li) = 3.3 MeV (1967GA06) and E(^{7}Li) = 3.78 to 5.95 MeV (1967KI03). See also (1974AJ01) and ^{13}C in (1976AJ04).
See (1974AJ01).
Capture γrays have been observed for E(^{3}He) = 0.8 to 6.0 MeV. The γ_{0} and γ_{5} yields [to ^{10}B*(0, 4.77)] show resonances at E(^{3}He) = 1.1 and 2.2 MeV [E_{res} = 0.92 and 2.1 MeV: see (1971LI20)], the γ_{1} and γ_{4} yields [to ^{10}B*(0.72, 3.59)] at 1.4 MeV and the γ_{4} yield at 3.4 MeV: see Table 10.10 (in PDF or PS). Both the 1.1 and 2.2 MeV resonances [^{10}B*(18.4, 19.3)] appear to result from swave capture; the subsequent decay is to two 3^{+} states [^{10}B*(0, 4.77)]. Therefore the most likely assignment is 2^{}, T = 1 for both [there appears to be no decay of these states via α_{0} to ^{6}Li*(3.56) which has J^{π} = 0^{+}, T = 1: see reaction 11] (1965PA02, 1971LI20). The assignment for ^{10}B*(18.8) [1.4 MeV resonance] is 1^{+} or 2^{+} but there appears to be α_{2} decay and therefore J^{π} = 2^{+}. ^{10}B*(20.2) [3.4 MeV resonance] has an isotropic angular distribution of γ_{4} and therefore J^{π} = 0^{+}, 1^{}, 2^{}. The γ_{2} 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 (1971LI20).
The excitation curve is smooth up to E(^{3}He) = 1.8 MeV [see (1974AJ01)] and the n_{0} yield shows resonance behavior at E(^{3}He) = 2.2 and 3.25 MeV, Γ_{lab} = 270 ± 30 and 500 ± 100 keV. No other resonances are observed up to E(^{3}He) = 5.5 MeV (1966DI04). See also Table 10.10 (in PDF or PS).
The yield of protons has been measured for E(^{3}He) = 0.60 to 4.8 MeV [see (1974AJ01)] and for 1.0 to 2.5 MeV (1975BO55; p_{0}, p_{2}): there is some indication of weak maxima at 1.1, 2.3 and 3.3 MeV. Polarization measurements are reported at E(^{3}He) = 14 MeV by (1976IR02; p_{0}). The evidence for a T = 2 state at E_{x} ≈ 23 MeV has not been published: see (1974AJ01). See also (1975FO19; astrophys.).
Yields of deuterons have been measured for E(^{3}He) = 1.0 to 2.5 MeV (1975BO56, 1977BO29; d_{0}) and yields of tritons are reported for 2.0 to 4.2 MeV (1969OR01; t_{0}): a broad peak is reported at E(^{3}He) ≈ 3.5 MeV (1969OR01). See also (1974AJ01, 1974LO1B), ^{8}Be and ^{7}Be. For reaction (c) see ^{7}Li.
Excitation functions have been measured for E(^{3}He) = 1.3 to 18.0 MeV: see (1974AJ01). The α_{0} group (at 8°) shows a broad maximum at ≈ 2 MeV, a minimum at 3 MeV, followed by a step rise which flattens off between E(^{3}He) = 4.5 and 5.5 MeV. Integrated α_{0} and α_{1} yields rise monotonically to 4 MeV and then tend to decrease (1965FO07). Angular distributions give evidence of the resonances at E(^{3}He) = 1.4 and 2.1 MeV seen in ^{7}Li(^{3}He, γ)^{10}B: J^{π} = 2^{+} or 1^{}, T = (1) for both [see, however, reaction 7]: Γ_{α} is small (1965PA03). The α_{2} yield [to ^{6}Li*(3.56), J^{π} = 0^{+}, T = 1] shows some structure at E(^{3}He) = 1.4 MeV and a broad maximum at ≈ 3.3 MeV (1965FO07, 1969OR01): see Table 10.10 (in PDF or PS). See also (1974LO1B) and ^{6}Li.
Angular distributions have been measured for the n_{0} group at E_{α} = 4.78 to 7.85 MeV (1972VA02) and 13.5 and 13.9 MeV (1962KJ05), and for the n_{1} group [to ^{10}B*(0.7)] at E_{α} = 6.71 to 7.85 MeV (1972VA02). Slowneutron threshold measurements have been reported corresponding of the formation of ^{10}B*(0, 0.72, (4.77), (6.42)): see (1974AJ01). The γdecay of ^{10}B*(2.15) involves E_{γ} = 415.1 ± 0.5 keV (2.15 → 1.74), 1435.6 ± 1.0 keV (2.15 → 0.72) and 719.1 ± 0.6 keV (0.72 → 0). The excitation energies for the first three excited states are then 719.1 ± 0.6, 1739.7 ± 1.5 and 2154.8 ± 1.2 keV (1970GA01). For τ_{m} measurements see Table 10.9 (in PDF or PS). See also (1978LO1C).
See (1975FO19; astrophsyics).
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 γtransitions from this and other reactions. The E_{p} = 0.32 MeV resonance (^{10}B* = 6.87 MeV) is ascribed to swave protons because of its comparatively large proton width [see ^{9}Be(p, p)] and because of the isotropy of the γradiation. The strong transition to ^{10}B*(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 ^{10}B*(0.7, 2.1) indicates T = 1. The amplitudes for the T = 0 and T = 1 parts of the wave function for ^{10}B*(6.87) are 0.92 and 0.39, respectively (1972RE07). See also (1975AU02). 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 (^{10}B* = 7.56 MeV) is formed by pwave protons, J^{π} = 0^{+} [see ^{9}Be(p, p), ^{9}Be(p, α)]. The isotropy of the γrays supports this assignment (1961TA02). 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 (1959WA16). The width of ^{10}B*(5.18) observed in the decay is 100 ± 10 keV (1975AU02). The exciation function for groundstate radiation shows resonance at E_{p} = 992 (Γ = 80 keV) and 1290 keV (Γ = 230 keV) (1962EL06, 1964HO02). Elastic scattering studies indicate swave formation and J^{π} = 2^{} for both (1956MO90). For the lower level (E_{x} = 7.48 MeV) the intensity of the g.s. capture radiation, Γ_{γ} = 25 eV (1964HO02) indicates E1 and T = 1. The angular distribution of γrays, 1 + 0.1 sin^{2} θ, is consistent with swave formation with some dwave admixture (1953PA22) or with some contribution from a nearby pwave resonance (1956MO90); possibly a J^{π} = 2^{+} level at E_{p} = 980 keV (1956MO90, 1962EL06: see, however, (1964HO02)). The angular distribution of groundstate radiation at E_{p} = 1330 keV is isotropic and Γ_{γ} = 8.5 eV (1964HO02), supporting E1, T = 1 for this level (E_{x} = 7.75 MeV). See, however, (1973RO24): reaction 15. Transitions to ^{10}B*(0.7) [γ_{1}] show resonance at E_{p} = 992, 1290 and 938 keV, Γ = 155 keV (1962EL06, 1964HO02). 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 (1964HO02). See also (1973RO24) in reaction 15 and (1975AU02). A resonance for capture radiation at E_{p} = 2.567 ± 0.003 (E_{x} = 8.894 MeV) has a width of 40 ± 2 keV and decays mainly via ^{10}B*(0.7) (1953MA1A): unpublished Ph.D. Thesis). It appears from the width that this resonance corresponds to that observed in ^{9}Be(p, α), J^{π} = 2^{+}, T = 1 and not to the ^{9}Be(p, n) resonance at the same energy (1956MA55). A further resonance is reported at E_{p} = 4.72 ± 0.01 MeV, Γ ≈ 0.5 MeV (1952HA10). In the range E_{p} = 4 to 18 MeV, the γ_{0} 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 ^{10}B*(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 γ_{0} yield with a 90° differential cross section ≈ 1.5 μb/sr. The average of γ_{1} is ≈ 2/3 of the γ_{0} yield. The broad giant resonance peak is centered at E_{x} ≈ 14.5 MeV. Fluctuations in the γ_{1} yield are reported at E_{x} ≈ 12.6, 13.3 and 14.1 MeV. These states presumably decay by M1 to ^{10}B*(0.7) [J^{π}_{f} = 1^{+}] and therefore J^{π}_{i} = 0^{+}, 1^{+}, 2^{+}. The weak γ_{2} yield (to ^{10}B*(1.74) [J^{π} = 0^{+}; T = 1]) seems to exhibit a braod 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 γ_{3} yield (to ^{10}B*(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. ^{10}B*(12.9) appears to have positive parity. Angular distributions of γ_{0}, γ_{1}, γ_{2} and γ_{3} are also reported (1970FI1B); unpublished Ph.D. thesis). The magnetic moment of ^{10}B*(0.72) has been studied via γγ correlations from ^{10}B*(7.56): g = +0.63 ± 0.12 (1972AV01). For measurements of the mean life of ^{10}B*(0.72), see Table 10.9 (in PDF or PS). See also (1966YO1A, 1973SZ07, 1974SO1D).
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 ^{10}B*(8.889, 10.84, 9.7): see Table 10.13 (in PDF or PS) in (1974AJ01). The E_{p} = 2.56 MeV resonance is considerably braoder than that observed at the same energy in ^{9}Be(p, α) and ^{9}Be(p, γ) and the two resonances are believed to be distinct (1956MA55). The shape of the resonance and the magnitude of the cross section can be accounted for with J^{π} = 3^{} or 3^{+}; the former assignment is in better accord with ^{10}Be*(7.37). For J^{π} = 3^{}, θ^{2}_{n} = 0.135, θ^{2}_{p} = 0.115 (R = 4.47 fm). The J^{π} = 2^{+} level should contribute about 10% to the cross section at E_{p} = 2.56 MeV (1962AL1A). Polarization measurements have been carried out for E_{pbar} = 2.4 to 2.9 MeV by (1976RO05) who find that it is unlikely that both states at E_{x} = 8.89 MeV have even parity. (1976BY1A, 1976LI1J, 1977BY1A; abstracts) have compared the polarization and the analyzing power for E_{p} = 3 to 10 MeV. (1976CR1B; abstract) report measuring an excitation function for E_{pbar} = 3.6 to 5.6 MeV as well as the angular distribution of the analyzing power at the 4.72 MeV resonance. The polarization transfer coefficient has been studied for E_{pbar} = 3.9 to 15.1 MeV by (1976LI08): negative values of K^{y'}_{y} (0) are reported near E_{pbar} = 7 MeV in a region where several states are known to exist in ^{10}B; a spinflip mechanism may also be involved. Differential cross sections have been measured at 0° at E_{p} = 14.7 and 19.7 MeV (1975MC18) and 29.4, 39.2 and 50.6 MeV (1976RO10). See also (1973AT01, 1975SE1G, 1977LO10), (1976AR1F, 1976NO1E, 1976WA1B, 1976WA1C) and ^{9}B. The ^{8}B yield (reaction (b)) has been measured for E_{p} = 22.0 to 47.5 MeV (1974DA18). See also (1978BY1B, 1978DE37; theor.).
The elastic scattering has been studied for E_{p} = 0.2 to 2.7 MeV [see (1974AJ01)] and at 1.95 to 2.8 MeV (1973MA59), 2.3 to 2.7 MeV (1977KI04), 4.0 to 6.0 MeV (1974YA05, 1974YA1C; also p_{1}, p_{2}) and 6.3 to 9.5 MeV (1974WI21; also p_{2}). Below E_{p} = 0.7 MeV only swaves are present exhibiting resonance at E_{p} = 330 keV [^{10}B*(6.88)], J^{π} = 1^{}. Between E_{p} = 0.8 to 1.6 MeV polarization and crosssection measurements are well fitted by a phaseshift analysis, using only the ^{3}S_{1}, ^{5}S_{2}, ^{5}P_{1} and ^{5}P_{2} 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) (1956MO90, 1973RO24). Pronounced minima at E_{p} = 2.48 and 2.55 are observed in the polarization (p_{0}): these are ascribed to T = 1 analogs of the 3^{} and 2^{+} states ^{10}Be*(7.37, 7.52) (1970AN1B). A strong anomaly is observed at E_{p} = 6.7 MeV: see Table 10.13 (in PDF or PS). (1973VO02) find that the p_{0} differential cross sections and polarization analyzing power are adequately described by a spherical optical model potential for E_{p} = 13 to 30 MeV: only the volume real potential depth V_{R} and the surface imaginary potential depth W_{S} need vary with energy. When coupledchannels analyses were made (1973VO02) found that a quadrupoledeformed optical model potential with a deformation β = 1.1 gives an improved description of the (p, p_{0}) data and good fits to data obtained for (p, p_{2}). 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). Recent measurements have been carried out at E_{p} = 2.0 to 2.8 MeV (1973MA59, 1976MA64) and 5.8 MeV (1974VA03) and at E_{pbar} = 32 MeV (1976MO1B). The angular distributions of the depolarization parameter, D, have been studied at E_{pbar} = 17 and 25 MeV (1974BI14, 1976BA1Q, 1976BL1B). See also (1970BE1B). Total reaction cross sections are reported at E_{p} = 20.1 to 46.2 MeV (1974MC19, 1975SL02). For earlier measurements see (1974AJ01). For reaction (b) see ^{8}Be. For spallation studies see (1976KO03, 1977AV01). See also (1973GO41, 1974GU23, 1975CA1L, 1975SE1G, 1978FR1D), (1974LO1B, 1976SH1J), (1974GU24, 1974GU13, 1975BA05, 1975BL10, 1975MA1H, 1976MA58, 1976RA1F, 1977KO1M, 1978BY1B, 1978FA04; theor.) and reactions 20 and 21 in ^{9}Be.
See (1976KO03, 1977AV01). See also ^{7}Li and ^{7}Be.
Knowledge of the cross sections of these two reactions at low energies is of importance for power generation and astrophysical considerations: see (1973SI27). Absolute cross sections for the d_{0} and α_{0} 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 (inclusing angular distributions), analyzed by an Rmatrix 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 10.8 (in PDF or PS)], 310 keV (1^{}) and 410 keV (1^{+}; 2^{+} or 3^{+} possible) (1973SI27). Measurements of exciation functions for deuterons and αparticles have been reported at a number of energies to E_{p} = 15 MeV: see (1974AJ01). Recent measurements include those of (1973MA59: 2.2 to 2.8 MeV; α_{0}), (1977KI04: 2.50 to 2.64 MeV; α_{2}γ), (1974YA1C: 4.0 to 6.0 MeV; d_{0}, α_{0}, α_{1}, α_{2}) and (1974WI21: 6.3 to 9.5 MeV; d_{0}, α_{0}). 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). A recent study is reported at E_{pbar} = 15 MeV by (1976DA15; d_{0}, d_{1}). See also ^{6}Li, ^{8}Be, (1976KO03, 1977AV01) and (1974LO1B).
Neutron groups are observed corresponding to the ^{10}B states listed in Table 10.15 (in PDF or PS). Thresholds for slowneutron production corresponding to ^{10}B states with 4.7 < E_{x} < 6.6 MeV are displayed in Table 10.17 (in PDF or PS) of (1974AJ01). Angular distributions have been measured from E_{d} = 0.5 to 16 MeV [see (1959AJ76, 1966LA04, 1974AJ01)] and at 15.25 MeV (1975AZ02; n to ^{10}B*(0, 0.7, 1.7 + 2.2, 3.6, 5.11 + 5.16, 5.92 + 6.03, 6.35 + 6.50)). Observed γtransitions are listed in Tables 10.6 (in PDF or PS) and 10.16 (in PDF or PS). Reported values of τ_{m} are displayed in Table 10.9 (in PDF or PS). From all the various experiments the following picture emerges: the first five states of ^{10}B have even parity [from l_{p}]. The ground state is known to have J = 3, by direct measurement, and ^{10}B*(1.74) has J^{π} = 0^{+} and is the T = 1 analog of the ^{10}C_{g.s.} [from the β^{+} decay of ^{10}C]. Then looking at the branching ratios and lifetimes of the other states, the sequence for ^{10}B*(0, 0.72, 1.74, 2.15, 3.59) is J^{π} = 3^{+}, 1^{+}, 0^{+}, 1^{+}, 2^{+} [see discussion in (1966LA04, 1966WA10)]. At E_{d} = 83.7 MeV the relative neutron yield down to E_{n} = 4 MeV is bellshaped with a peak at about 34 MeV and a FWHM of ≈ 22 MeV (1976MA43). See also ^{11}B in (1980AJ01), (1973SR1A, 1974KA34, 1975SR01, 1977BA2K, 1977LO10, 1977RI08, 1978LO1C) and (1975AU1C, 1976EA1A; applications).
Deuteron groups have been seen corresponding to a number of states of ^{10}B: see Table 10.17 (in PDF or PS). Angular distributions have been measured at E_{d} = 10 to 25 MeV [see (1974AJ01)] and at E(^{3}Hebar) = 33.3 MeV (1976KA23) and lead to the l_{p} and spectroscopic factors shown in Table 10.17 (in PDF or PS). For τ_{m} see Table 10.9 (in PDF or PS). See also (1973CL1D, 1977RI08) and ^{12}C in (1980AJ01).
Angular distributions have been studied at E_{α} = 27 MeV (1974KE06; t_{0}, t_{1}, t_{3}), 28.3 MeV (1965KA14; t_{0}, t_{1}) and E_{α} = 43 MeV (1967SI1A; t_{0}, t_{2}). The transition to ^{10}B*(1.74) [0^{+}; T = 1] is suppressed by at least a factor of five compared to the transitions to the T = 0 states (1974KE06). See also ^{13}C in (1976AJ04).
At E(^{7}Li) = 34 MeV angular distributions have been obtained for the ^{6}He ions to the first four states of ^{10}B. 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 ^{10}B*(0, 0.74, 1.74, 2.15) (FRDWBA analysis) (1977KE09). See also (1974KE06).
See ^{10}Be.
Absolute measurements have been made of the ^{10}B(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) (1973HU09, 1976KN04). Using 12.5 MeV bremsstrahlung (1968SH21) report peaks in the (γ, p) cross section corresponding to ^{10}B states at 8.8 ± 0.1 [J^{π} = 2^{+}], 9.2 ± 0.1 [3^{+}] and (≈ 10.5) [π = +] MeV, with T = 1. See (1959AJ76, 1966LA04) for reactions (c) and (d). See also (1974BU1A, 1976BE1H).
See (1967LO1B).
The quadrupole contribution to the elastic form factor is best accounted for by the undeformed shell model, Q = 7.45 (± 20%) fm^{2}, < r^{2} > ^{1/2} = 2.45 fm (1966ST12). The magnetic form factors for E_{e} = 70 to 200 MeV have been determined for the elastic group (+ a small contribution due to ^{10}B*(0.7)): there is no evidence of an M3 contribution  the magnetic octupole moment ≲ 1.6 fm^{2}, a_{0} = 1.4 ± 0.2 fm (1966RA29). Inelastic groups are displayed in Table 10.18 (in PDF or PS). There is evidence for M1 transition strength to at least one level at E_{x} ≈ 11 MeV (1976FA13). See also (1977YE1A). No sharp states are observed for 15 < E_{x} < 20 MeV (1977YE1A). See also (1974AJ01, 1974DE1E, 1975FA1A) and (1973GA19, 1974TA20, 1976DU05, 1978BO09; theor.). At E_{e} = 700 MeV the proton separation spectra (reaction (b)) are similar to those observed in (p, 2p) except for an upward shift in the exciation (1978NA05).
Angular distributions have been studied for E_{n} = 1.5 to 14.1 MeV [see (1974AJ01)] and at E_{n} = 4.08 to 8.03 MeV (1978KN01; elastic) and 14.1 MeV (1974HY01; to ^{10}B*(0 + 0.7, 1.7 + 2.2, 3.59, 6.03 and groups of unresolved states at higher E_{x}). The breakup of ^{10}B + n into 2α + d + n has been studied at E_{n} = 14.4 MeV (1975AN1C). See also ^{11}B in (1975AJ02).
Angular distributions have been measured for E_{p} = 3.0 to 49.5 MeV [see (1974AJ01)] and at 30.3 MeV (1976DE15: to ^{10}B states with E_{x} < 6.6 MeV). Table 10.19 (in PDF or PS) displays the observed results. The 4^{+} state at 6.03 MeV is the most strongly excited of the ^{10}B states [see (1974AJ01)]; B(E2↑) = 26 ± 5 fm^{4} and Γ(E2↓) = 0.14 eV (1965JA1A). Gamma rays have been observed with E_{γ} = 718.5 ± 0.2 keV and 1021.5 ± 0.5 keV (1966FR09: from decay of E_{x} = 718.5 ± 0.2 and 1740.0 ± 0.6 keV) and E_{γ} = 720.1 ± 2.0, 1022.0 ± 2.0, 1435.1, 2155.6 ± 2.0 and 2868.5 ± 2.0 keV (1969PA09: from decay of E_{x} = 720.4 ± 1.9, 1742.3 ± 2.3, 2155.4 ± 1.9 and 3589.7 ± 2.2 keV). See also reaction 40. (1968MA18) report δ(E2/M1) = (0.23^{+0.06}_{0.05}) or (4.1^{+1.0}_{0.7}) for the 2.15 → 0.72 transition. The 1.74 → g.s. and 3.59 → 1.74 transitions have not been observed: < 0.2% and < 0.3%, respectively (1966SE03). The branching ratio for 5.16 → 1.74 is < 0.5% and 5.16 → 3.59 is (4.5 ± 1)% [see Table 10.6 (in PDF or PS)] (1967PA01). See Table 10.9 (in PDF or PS) for τ_{m} measurements. See also ^{11}C in (1980AJ01), (1977CO1G) and (1974GU13, 1977PH02; theor.).
The summed proton spectrum (reaction (a)), observed at E_{p} = 460 MeV, shows peaks corresponding to the removal of an l ≠ 0 proton at Q = 6.7 ± 0.5, 11.9 ± 0.5 and 17.1 ± 0.6 MeV; for removal of an l = 0 proton, Q = 30.5 ± 0.6 MeV (1966TY01). See also (1974AJ01). For reaction (b) see (1977WA05) and for reaction (c) see (1974AJ01).
Deuteron groups have been observed corresponding to twelve states of ^{10}B: see Table 10.19 (in PDF or PS). The very low intensity of the group to ^{10}B*(1.74) (1974ST01) and the absence of the group to ^{10}B*(5.16) (1962AR02) is good evidence of theor T = 1 character. Angular distributions have been reported at E_{dbar} = 4 to 28 MeV [see (1974AJ01)] and at 6.5 to 12.0 MeV (1974ST01; d_{2}, d_{3}), 13.6 MeV (1975ZA08; d_{0}) and at E_{dbar} = 15 MeV (1974BU06; d_{0}). See also ^{12}C in (1980AJ01) and (1977IZ01; theor.).
Angular distributions of elastically scattered tritons have been measured at E_{t} = 1.5 to 3.3 MeV: see (1974AJ01).
Angular distributions of elastically scattered ^{3}He have been measured at E(^{3}He) = 4 to 32.5 MeV: see (1974AJ01). Angular distributions have also been measured at E(^{3}He) = 32.5 MeV to ^{10}B*(0.72, 1.74, 2.15, 3.59, 4.77, 5.11 + 5.16 + 5.18, 6.03, 6.56). L = 2 gives a good fit to the distributions of ^{3}He ions to ^{10}B*(0.72, 2.15, 3.59, 6.03): derived β_{L} are shown in Table 10.19 (in PDF or PS) (1968SQ01).
Angular distributions have been measured at E_{α} = 5 to 30 MeV and at 56 MeV [see (1974AJ01)] as well as at 24 MeV (1976DE34; to ^{10}B*(0, 0.72, 2.15, 3.59, 4.77, 5.11 + 5.18, 5.92 + 6.03)), 30, 32, 34 and 40 MeV (1976BE1M; α_{0}) and at 50.6 MeV (1976BE1M; α_{0}, α_{1}, α_{3}, α_{4}, α_{5}). ^{10}B*(1.74) is not observed. S_{α} for ^{10}B_{g.s.} = 0.29 (1976WO11). At E_{α} = 24 MeV a kinematically complete study of reaction (b) is said to require 17 new states of ^{10}B with 8.66 < E_{x} < 16 MeV (1974ST13). See also ^{14}N in (1976AJ04) and (1974DO1G).
Elastic scattering angular distributions (reaction (a)) have been studied at E(^{6}Li) = 5.8 (1976PO02) and 30 MeV (1977KE09). The elastic scattering in reaction (b) has been studied at E(^{7}Li) = 24 MeV (1972WE08). See also (1974KO1G).
Elastic scattering angular distributions (reaction (a)) have been studied at E(^{10}B) = 8, 13 and 21 MeV (1975DI08). For yields see (1975DI08, 1976HI05, 1978MA07). For reaction (b) see (1976HI05).
Elastic scattering angular distributions have been measured at E(^{10}B) = 18 MeV (1968VO1A, 1969VO10) and 100 MeV (1975NA15, 1977TO02). For fusion cross section measurements see (1976ST12, 1977HI01). See also (1973BR1C) and (1978AV1A; theor.).
The elastic scattering angular distribution has been studied at E(^{10}B) = 100 MeV (1975NA15). For fusion crosssection measurements see (1977HI01, 1977WU1B, 1978KO1J, 1978WU1B, 1978WU1C). See also (1978RO1D; astrophys.) and (1977MO1J; theor.).
Elastic scattering angular distributions (reaction (a)) have been studied with E(^{16}O) = 15.0 to 32.5 MeV [see (1968OK06, 1968OK1B, 1969KR03)] and at E(^{10}B) = 100 MeV (1975NA15, 1977TO02). For fusion cross section measurements see (1977GO1C). The elastic scattering in reaction (b) has been studied for E(^{18}O) = 20, 24 and 30.5 MeV (1971KN05).
The elastic scattering has been investigated for E(^{19}F) = 20 and 24 MeV (1971KN05).
The weighted mean of earlier values of the halflife is 19.42 ± 0.06 sec: see (1974AJ01). Recent values are τ_{1/2} = 19.28 ± 0.02 sec (1974AZ01). And 19.151 ± 0.026 sec (1974RO21): we adopt the average, τ_{1/2} = 19.255 ± 0.053 sec (1975HA45). The decay is to ^{10}B*(0.7, 1.7): see Table 10.20 (in PDF or PS) for branching ratios and log ft. The "corrected" ft value for the transition to ^{10}B*(1.7) is then 3108 ± 31 sec, based on E_{β+}(max) = 1910.22 ± 0.59 keV to ^{10}B*(0.7) [see ^{10}B(p, n)^{10}C] (1975HA45). The excitation energies of ^{10}B*(0.7, 1.7) are E_{x} = 718.32 ± 0.09 and 1740.16 ± 0.17 keV [E_{γ} = 718.29 ± 0.09 and 1021.78 ± 0.14 keV] (1969FR02). Based on the decay ^{10}C_{g.s.} → ^{10}B*(1.7) and on other 0^{+} → 0^{+} decays, (1975HA45, 1977TO11) find an effective coupling constant G'_{V} = (1.4128 ± 0.0005) × 10^{49} erg · cm^{3}, in agreement with the CVC hypothesis. The Fierz interference constant b_{F} ≤ 0.006 (1975HA45). See also (1975RA37), (1974AS07, 1974WI02, 1975KR14, 1977AZ02, 1977RI08, 1977SZ03, 1978SZ03; theor.) and this footnote (Note added in proof: Q_{0} = 23360.74 ± 0.5 keV (J.A. Nolen, private communication): this leads to an atomic mass excess of 15699.9 ± 0.5 keV for ^{10}C.).
The intensities of the transitions to ^{10}B*(3.59, 5.16) [T = 0 and 1, respectively] depend on the region of the giant dipole resonance in ^{11}B 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 (1971PA10). See also ^{11}B in (1980AJ01).
Angular distributions of deuteron groups have been measured at E_{p} = 17.7 MeV (1977GU14; d_{0}, d_{1}), 19 MeV (1963LE03; d_{0} → d_{4}), 33.6 MeV (1968KU04; d_{0} → d_{5} and deuterons to states at 5.18 (unres.), 6.04 (unres.)), and 154.8 MeV (1969BA05, 1969TO1A; d_{0} → d_{4} and d to 5.1 ± 0.1, 11.4 ± 0.2 and 14.1 ± 0.2 MeV). The weak excitation of states at 6.56 and 7.5 MeV is also reported (1968KU04), and Γ_{c.m.} of ^{10}B*(11.4) = 1.1 ± 0.2 MeV (1969BA05). Spectroscopic factors have been extracted by [(1963LE03): PWBA; (1968KU04): DWBA; (1969BA05); and (1969TO1A): DWBA].
Angular distributions have been measured at E_{d} = 11.8 MeV (1969FI1A; t_{0} → t_{3}; l = 1; S = 1.88, 0.94, 1.35, 1.35, respectively). The transition to ^{10}B*(2.15) proceeds predominantly via a p_{3/2} transfer whereas a dominant p_{1/2} transfer occurs for the transition to ^{10}B*(0.72) (1974VA1E; E_{dbar} = 27.8 MeV). See also (1974AJ01) and ^{13}C in (1981AJ01).
Reported levels are displayed in Table 10.21 (in PDF or PS). Angular distributions have been measured at a number of energies between E(^{3}He) = 1.0 and 33 MeV: see (1974AJ01). For the decay of the observed states see Table 10.6 (in PDF or PS); for lifetime measurements see Table 10.9 (in PDF or PS). The αα angular correlations (reaction (b)) have been measured for the transitions via ^{10}B*(5.92, 6.03, 6.13, 6.56, 7.00). The results are consistent with J^{π} = 2^{+} and 4^{+} for ^{10}B*(5.92, 6.03) and require J^{π} = 3^{} for ^{10}B*(6.13). There is substantial interference between levels of opposite parity for the αparticles due to ^{10}B*(6.56, 7.00): the data are fitted by J^{π} = 3^{+} for ^{10}B*(7.00) and (3, 4)^{} for ^{10}B*(6.56) [the ^{6}Li(α, α) results then require J^{π} = 4^{}] (1971YO05). See, however, (1973SI27) in reaction 18.
See (1968OK06).
See (1973SK1A).
Not reported.
See (1977BA51).
Angular distributions of ^{3}He ions have been measured at E_{p} = 39.8 MeV (1973HO10; to ^{10}B*(0, 0.72, 1.74, 2.15, 3.59)), 51.9 MeV (1977YA10; to ^{10}B*(0, 0.72, 1.74, 2.15, 3.59, 4.77, 5.16, 5.92, 6.56, 7.50, 8.90)) and 185 MeV (1972DA26; to ^{10}B*(0, 1.0, 1.7, 2.5, 3.5, 4.8, 6.0, 7.3)). See also (1974KA15). In reaction (b) (1978DE1N) report the excitation of the first four states of ^{10}B. See also (1977GR04: E_{p} = 75 MeV; spectroscopic factors). See also (1976HU1B) and (1974ZH01, 1975BA1H; theor.).
Alpha groups have been observed to the known states of ^{10}B 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 29.1 MeV [see (1974AJ01)] and at 13.8 to 16.0 MeV (1974JO01; α_{2}), 14 and 15 MeV (1974JO01; α_{0}, α_{1}, α_{3}), at E_{dbar} = 20.7 and 29 MeV (1977CO17; α_{0}, α_{1}, α_{3}, α_{4}, α_{5}), and at E_{d} = 40 MeV (VA76; α_{0}, α_{1}, α_{3}, α_{4}, α_{5}). Single particle Svalues are 1.5, 0.5, 0.1, 0.1 and 0.3 for ^{10}B*(0, 0.72, 2.15, 3.59, 4.77) (1976VA07; ZRDWBA). A study of the m_{s} = 0 yield at E_{dbar} = 14.5 MeV (θ = 0°) leads to assignments of 3^{+}, 2^{} and (3^{+}, 4^{}) for ^{10}B*(4.77, 5.11, 6.56) (1975KU15). The population of the isospin forbidden group to ^{10}B*(1.74) [α_{2}] has been studied with E_{d} up to 30 MeV: see ^{14}N in (1976AJ04). See also (1977TO1E, 1978IZ02; theor.).
Angular distributions have been reported at E_{α} = 42 MeV (1972RU03; to ^{10}B*(0, 0.72, 2.15)) and at 46 MeV (1976MA50; to ^{10}B*(0, 0.72, 2.15, 3.59).
See (1965SH1A).
For reaction (a) see (1974AJ01). For reaction (b) see (1974AN36). Angular distributions (reaction (c)) have been measured at E(^{14}N) = 53 MeV (1976ZE04; to ^{10}B*(0, 0.72, 2.15, 3.59)) and 78.8 MeV (1977MO1H; to ^{10}B*(0, 0.72, 2.15)). See also ^{16}O in (1982AJ01).
Angular distributions have been measured for E_{p} = 5.8 to 18.0 MeV (1975OB01; α_{0} and α_{2} from E_{p} = 7.95 MeV) and at 43.7 and 50.5 MeV (1972MA21; α_{2} (L = 1) and α to ^{10}B*(6.03) (L = 3)). See also ^{14}N in (1976AJ04).
See (1974AN36).
For reaction (a) see (1959AJ76); for reaction (b) see (1961CL09).
See (1978OE1B).
At E(^{3}He) = 41 MeV groups to ^{10}B*(0, 0.72, 2.15, 3.59, 6.1) have been observed. The transition to ^{10}B*(1.74) is very weak (1971DE37). See also (1976RO04).
See (1970GO1B).
See (1974AJ01).
See (1974AJ01).
