Information on mass chains and nuclides available on this website:

WWW TUNL

GENERAL: See also (81AJ01) and Table 14.1 [Table of Energy Levels] (in PDF or PS) here.

Nuclear models: (SE81C, VA84).

Complex reactions involving ¹⁴B: (WI83H, HI84).

Pion capture and reactions: (TR83J).

Hypernuclei: (WA81D, KA82T, FE83A).

Other topics: (PO84E).

Ground state of ¹⁴B: (AN83D).

Mass of ¹⁴B: We adopt the Wapstra atomic mass excess for ¹⁴B: 23664 ± 21 keV. See also (NA81H).

1. 14B(β-)14C

Qm = 20.64

¹⁴B has a half-life of 16.1 ± 1.2 msec. The β^- decay is primarily to ¹⁴C*(6.09, 6.73): see Table 14.2 (in PDF or PS). The nature of the decay fixes the J^π of ¹⁴B to be 2^-.

2. 14C(π-, γ)14B

Qm = 118.92

A single strong transition is observed in this pion capture cross section to a state in ¹⁴B at E_x = 2.15 ± 0.17 MeV, Γ = 1.0 ± 0.5 MeV, with J^π = 2^-. The relative branching ratio of the ground state [2^-] to this second 2^- state is < 0.1. The data are also suggestive of the population of 2^- and 1^- states in the E_x = 5 - 7 MeV region (BA83V).

3. 14C(7Li, 7Be)14B

Qm = -21.51

¹⁴B states with 0 < E_x < 3 MeV have been populated in this reaction at E(⁷Li) = 52 MeV: see Table 14.1 (in PDF or PS). Similarities in the relative intensities of ¹⁴B*(0, 0.74, 1.38, 1.82, 2.08) and of ¹²B*(1.67, 2.62, 3.39, 4.30, 4.52) [populated in ¹²C(⁷Li, ⁷Be)¹²B], and the similarity in the (ΔE_x of these ¹²B states with the E_x of the ¹⁴B states suggest that they have the same J^π (BA73L). See also (AL82B, GL84).

4. 14C(14C, 14N)14B

Qm = -20.49

At E(¹⁴C) = 87.4 MeV the ground state of ¹⁴B is observed: the atomic mass excess is 23.67 ± 0.03 MeV. The differential cross section (θ = 4° - 8°) is 7 μb/sr. The previously reported excited state at 0.74 MeV is not observed (NA81H).