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GENERAL: See also (68AJ02) and Table 12.1 [Table of Energy Levels] (in PDF or PS).

Special reactions: (GI65E, AR69E, AR71, VO72C, KO73F).

General review: (CE74B).

Theoretical papers: (DO71F, ST72F, WI73J, IR74A, MA74S).

Mass of ¹²Be: The Q-value of the ¹⁴C(¹⁸O, ²⁰Ne)¹²Be reaction [-15.77 ± 0.05 MeV] (BA74C) leads to an atomic mass excess of 25.05 ± 0.05 MeV; that for the ⁷Li(⁷Li, 2p)¹²Be reaction [Q = -9.71 ± 0.10 MeV] (HO71H) leads to an A.M.E. of 24.95 ± 0.10 MeV. We adopt an atomic mass excess of 25.030 ± 0.045 MeV for ¹²Be. The binding energies of (¹¹Be + n), (¹⁰Be + 2n) and (⁹Be + 3n) are then 3.22, 3.72 and 10.53 MeV, respectively. See also (CE72, WA72A, TH74).

1. 12Be(β-)12B

Qm = 11.66

An activity of τ_1/2 = 11.4 ± 0.5 msec, observed in the GeV proton bombardment of various targets, is ascribed to ¹²Be. log ft = 3.5 if the transition is to the ground state of ¹²B (PO65B).

2. 7Li(7Li, 2p)12Be	Qm = -9.79
	Q0 = -9.71 ± 0.10 (HO71H).

This reaction has been studied at E(⁷Li) = 25.0, 30.0 and 30.1 MeV. The ground state of ¹²Be and an excited state with E_x = 0.81 ± 0.10 MeV are populated with cross sections of 2.9 ± 1.0 μb/sr² and 1.1 ± 0.6 μb/sr², respectively (HO71H, HO71I).

3. 14C(18O, 20Ne)12Be	Qm = -15.75
	Q0 = -15.77 ± 0.05 (BA74C).

At E(¹⁸O) = 88.7 MeV, the population of the ground state of ¹²Be and of an excited state at E_x = 2.09 ± 0.05 MeV [and of many states in ²⁰Ne: see (78AJ03)] is reported by (BA74C). ¹²Be*(0.81), reported in reaction 2, was not observed by (BA74C).