1987DUZU, 1988DU09, 1988DUZT: ¹⁹C(β^-n); measured β-delayed neutron spectra; deduced T_1/2, multi-neutron branching ratios.

1994OZZY, 1995KIZZ, 1995OZ02, 1995OZZY: ¹⁹C(β^-n); measured β-delayed neutron spectra, γn-coin, T_1/2; deduced log ft, B(GT). ¹⁹N deduced levels, β-decay branching ratios.

2002KAZU, 2003KAZX: ¹⁹C(β^-); measured I_β(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:	(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	44.1 ± 4.2 ms	(1994RE1R: see also 44 ± 4 ms in the unpublished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).

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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: 30 June 2021