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14B (1991AJ01)
(See Energy Level Diagrams for 14B)
GENERAL: See also (1986AJ01) and 
14.1 [Table of
Energy Levels] (in PDF or PS) here.
Complex reactions involving 14B: (1986BI1A, 1987SA25, 1988AS1C, 1988RU01, 1989AS1B, 1989YO02).
Pion capture and reactions: (1983AS01, 1984AS05).
Hypernuclei: (1986ME1F, 1988MA1G, 1989BA92).
Other topics: (1984VA06, 1986AN07, 1989PO1K, 1990RE04).
Ground state of 14B: (1987VA26, 1990LO10).
Interaction cross sections at 790 MeV/A for 14B ions on Be, C and Al are reported by (1988TA10) [see also for interaction and r.m.s. radii for the nucleon distribution in 14B]. See also (1989SA10).
| 1. 14B(β-)14C | Qm = 20.64 |
14B has a half-life of 16.1 ± 1.2 ms (1974AL11), 12.8 ±
0.8 ms (1986CU01):
the weighted mean is 13.8 ± 1.0 ms and we adopt it. The nature of the decay [see
14.2 (in PDF or PS)] fixes Jπ of 14B to be 2- (1974AL11). See also
(1989PO1K; theor.).
| 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 Ex = 2.15 ± 0.17 MeV, Γ = 1.0 ± 0.5 MeV, with Jπ = 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 Ex = 5 - 7 MeV region (1983BA36).
| 3. 14C(n, p)14B | Qm = -19.86 |
Ground-state angular distributions have been reported at En = 65 MeV (1986DR1F, 1988DRZZ; prelim.).
| 4. 14C(7Li,7Be)14B | Qm = -21.51 |
14B states with 0 < Ex < 3 MeV have been populated in this
reaction at E(7Li) = 52 MeV: see 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 ΔEx of these 12B states with the
Ex of the 14B states suggest that they have the same
Jπ (1973BA34).
| 5. 14C(14C, 14N)14B | Qm = -20.49 |
The work quoted in (1986AJ01) has not been published.