β--Decay Evaluated Data

1988DUZT: 20N(β-); measured Eγ, T1/2, production rates.
1988MU08: 20N(β-n); measured T1/2, neutron emission probabilities.
1990MU06: 20N; measured T1/2, delayed n emission probabilities.
1991RE02: 20N(β-n); measured T1/2, neutron emission probability, upper limits. Tof isochronous spectrometer, ion-neutron delayed coincidence.
1994RE1R: 20N(β-n); measured delayed n intensity, T1/2.
1993REZX: 20N(β-n); measured β-delayed neutron average energies.
2006SU12: 20N(β-), (β-n); measured β-delayed En, Eγ, βγ-, nγ-, nβ-coin, T1/2; deduced β-emission and γ-emission probabilities, B(GT). 20O deduced levels, β-feeding intensities.
2008SUZN: 20N(β-); measured Iβ, Eγ, Iγ(t), βγ-coin, , β-delayed En, In(θ, t); deduced B(GT) distribution.
Measured half-life for 20N(β-)20O

Recommended value (August, 2015): 134.4 ± 3.7 ms
Summary Table of Uncertainty Analysis:     Table 20N preview (PDF)  
Measured values: 136 ± 3 ms (2006SU12)
129 ± 8 ms (1994RE1R: see also 142 ± 19 ms in (1991RE02) and 130.0 ± 6.6 ms
in the unpublished private communications of (2008REZZ)/(1995REZZ).)
    70 ± 40 ms (1988DUZT)
100+30-20 ms (1987MU1J, 1988MU08, 1990MU06)
Other Reviews: 136 ± 3 ms (2015BI05)

Previous Measurements


References Pn (%)
(1987MU1J; preliminary) ≈ 61
(1988MU08, 1990MU06) 53+11-7
(1991RE02) 66.1 ± 5.0
(2006SU12) 42.9 ± 1.4

20C(β-)20N Evaluated Data

20O(β-)20F Evaluated Data

20F(β-)20Ne Evaluated Data

20Na(β+)20Ne Evaluated Data

20Mg(β+)20Na Evaluated Data

A = 20 Beta-Decays Diagram

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Last modified: 30 June 2021