19C

β--Decay Evaluated Data



Measurements
1987DUZU, 1988DU09, 1988DUZT: 19C(β-n); measured β-delayed neutron spectra; deduced T1/2, multi-neutron branching ratios.
1994OZZY, 1995KIZZ, 1995OZ02, 1995OZZY: 19C(β-n); measured β-delayed neutron spectra, γn-coin, T1/2; deduced log ft, B(GT). 19N deduced levels, β-decay branching ratios.
2002KAZU, 2003KAZX: 19C(β-); measured Iβ(t) from oriented nuclei implanted in various materials; deduced spin polarization, g-factor.
Measured half-life for 19C(β-)19N

Recommended value (September, 2015): 46.3 ± 4.0 ms
Summary Table of Uncertainty Analysis:       Table 19C preview (PDF)  
Measured values: 45.5 ± 4.0 ms (1995OZ02)
44.1 ± 4.2 ms (1994RE1R: see also 44 ± 4 ms in the unpublished
private communications of (2008REZZ)/(1995REZZ).)
49 ± 4 ms (1988DU09: see also preliminary value 30 ± 10 ms in (1988DUZT).)
Other Reviews: 46.2 ± 4.0 ms (2015BI05)

Previous Measurements

 

En(lab)
(MeV)
Ex(19N)
(MeV)
Iβ a
(normalized to 100)
Iβ (%) b
(normalized to P1n)
log ft β-delayed multi-neutron
branching ratios (%)
(1995OZ02) (1988DU09)
2.08 ± 0.02 unidentified       P0n 46 ± 3
1.50 ± 0.02 7.02 ± 0.02 27.0 ± 2.6 12.7 ± 1.5 4.70 ± 0.13 P1n 47 ± 3
1.01 ± 0.01 6.50 ± 0.01 42.6 ± 1.9 20.0 ± 1.6 4.61 ± 0.12 P2n   7 ± 3
0.46 ± 0.01 6.39 ± 0.01 30.4 ± 3.9 14.3 ± 2.0 4.77 ± 0.13    
a) The values are relative intensities normalized to 100 one-neutron emissions.
b The values are normalized to P1n = 47 ± 3 % (1988DU09).

19B(β-)19C Evaluated Data

19N(β-)19O Evaluated Data

19O(β-)19F Evaluated Data

19Ne(β+)19F Evaluated Data

A = 19 Beta-Decays Diagram

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Last modified: 21 May 2018