12Be

β--Decay Evaluated Data

Measurements
1984DU15: 12Be(β-); measured T1/2.
1986CU01: 12Be(β-); measured β-decay T1/2.
1986HAYX: 12Be; measured β-decay T1/2.
1994KE06: 12Be(β-); measured βγ-coin, T1/2; deduced ft. 12B levels deduced β-branching ratio.
1999BE53: 12Be(β-); measured β-delayed neutrons, βn and nn time correlations. 12Be deduced neutron emission probabilities, branching ratios.
2001BE53: 12Be(β-); measured T1/2, βn and β2n branching ratios, neutron spectra.
2002BE53: 12Be(β-)(β-n); measured Eβ, β-delayed neutron spectra, T1/2. Deduced decay branching ratios.
Measured half-life for 12Be(β-)12B

Adoptded value: 23.6 ± 0.9 ms: mean of (1978AL10, 1984DU15, and 1986CU01)
Measured values: 21.3 ± 2.2 ms (1986CU01)
24.0 ± 1.0 ms (1984DU15)
24.4 ± 3.0 ms (1978AL10)
11.4 ± 0.5 ms (1965PO03)
Previous Measurements

 
Decay to
12B (MeV)		 log ft Eβ-(max) (MeV)
(1965PO03) a b (1965PO03)
0 3.5 3.84 ± 0.06 3.834 ± 0.017 ≈ 11.7
a) M.J. Martin, private communication to Fay Ajzenberg-Selove (1980AJ01).
b) M.J. Martin, private communication to Fay Ajzenberg-Selove (1990AJ01).
12B(β-)12C Evaluated Data

12N(β+)12C Evaluated Data

A = 12 Beta-Decays Diagram

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Last modified: 08 July 2009