| Recommended value (July, 2015): | 12.6 ± 0.6 ms | |
| Summary Table of Uncertainty Analysis: |  (PDF) |
|
| Measured values: | 12.4 ± 0.3 ms | (1994RE1R: see also 12.30 ± 0.29 ms in the unpublished |
| private communications of (2008REZZ)/(1995REZZ).) | ||
| 12.8 ± 0.8 ms | (1986CU01) | |
| 16.1 ± 1.2 ms | (1974AL11) | |
| Other Reviews: | 12.36 ± 0.29 ms | (2015BI05) |
| Decay to 14C* (MeV) |
Jπ | Branching Ratio (%) a | log ft | |
|---|---|---|---|---|
| (1974AL11) | (1974AL11) | b | ||
| 0 | 0+ | (5 ± 3) c | (6.1 ± 0.3) | |
| 6.09 d | 1- | 81 ± 9 | 4.22 ± 0.05 | 4.16 ± 0.06 |
| 6.73 | 3- | 8.6+1.7-4.0 | 5.10+0.30-0.08 | 5.04+0.27-0.08 |
| 7.34 | 2- | < 11 e | > 4.9 | > 4.8 |
| a) The measured γ-ray intensity ratios are I6.09/I6.73/I7.34 = 100/(10.0 ± 2.0)/< 2.2 (1974AL11). |
| b) M.J. Martin, private communication to Fay Ajzenberg-Selove (1991AJ01). |
| c) This branch has not been observed. It is assumed to be 5 ± 3 % in the calculation of the branching ratios to 14C*(6.09, 6.73). However, (1975MI12; theor.) suggest that the branch may be as small as ≈ 0.3%. The errors shown for the branching ratios reflect this uncertainty (1974AL11). |
| d) Eβ-(max) = 14.0 ± 0.7 MeV to this state. |
| e) This branch has not been observed: the upper limit is shown. In the calculations of the branching ratios to 14C*(6.09, 6.73) a value 5 ± 5 % was used. |
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Last modified: 29 June 2021