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GENERAL: See Table 13.1 [Table of Energy Levels] (in PDF or PS).

See (1960TA1C, 1966MO1E). See also (1969AR13).

1. 13B(β-)13C

Qm = 13.437

The ratio of the half-life of ¹³B to that of ¹²B is 0.86 ± 0.02 (1962MA19). Taking τ_1/2(¹²B) = 20.41 ± 0.06 msec (see (1968AJ02)), τ_1/2(¹³B) = 17.6 ± 0.4 msec (1962MA19). (1968CH28) have observed delayed neutrons decaying with τ_1/2 = 16 ± 1 msec. The branching ratios to various ¹³C states are shown in Table 13.2 (in PDF or PS) (1962MA19, 1969JO21): they indicate J^π = 1/2^- or 3/2^- for ¹³B(0). See also (1959AJ76).

2. 7Li(7Li, p)13B

Qm = 5.964

Proton groups have been observed to five states of ¹³B: see Table 13.3 (in PDF or PS) (1959MO12, 1963CA09). Angular distribution measurements have been reported by (1969CA1A) in the range E(⁷Li) = 2.1 to 5.8 MeV (p₀, p₁₊₂, p₃₊₄, p₅, p₇). The lifetimes of ¹³B*(3.53, 3.71, 4.13) are, respectively, > 0.3, < 0.38 and 0.062 ± 0.050 psec: E_γ = 3536.3 ± 4.2 and 4133.4 ± 7.8 keV (1969TH01). See also (1962BE24), (1959AJ76) and ¹⁴C.

3. 11B(t, p)13B	Qm = -0.233
	Q0=-0.233 ± 0.004 MeV (1960MU07).

At E_t = 11 MeV, proton groups are observed to ten states of ¹³B: see Table 13.3 (in PDF or PS). Angular distributions have been analyzed for seven of the ¹³B levels (1964MI04). The ground state is formed by L = 0 transfer, leading to an unambiguous assignment of J^π = 3/2^-. See also (1960JA17, 1962MA19, 1967BA1E, 1968CH28, 1969BA1Z, 1969JO21).