31 Na
11 20
Half life: 17.0 ms 4
Jp: 3/2+
Decay mode: b-, b-n, b-2n
Sn (keV): 4.00E3 19
Sp (keV): 1.69E4 8
Literature cut-off date: 1-Jun-1990
Author(s): P.M. Endt
ENSDF citation: NP A521,1 (1990)

Decay properties

Mode Branching (%) Q-value (keV)
b- 100 1.588E4 18
b-n 37 5
b-2n 0.9 2

Gammas from 31Na (17.0 ms 4)

Eg (keV) Ig (%) Decay mode
171.1 16 4.8 4 b-
221.6 10 2.1 3 b-
306.5 6 13 14* b-n
623.5 8 3.2 3 b-
673.8 12 1.40 14 b-
808.7 16 1.5 3 b-
895.0 11 0.78 22 b-
985.0 7 12 22* b-n
1213.4 15 1.20 11 b-
1482.1 5 100* b-n
1820.1 6 20 2* b-n
1978.1 8 22 3* b-n
2022.2 11 3.8 4 b-
2193.4 14 3.1 4 b-
2243.9 7 10.4 7 b-
3537.6 12 0.77 25 b-

Betas from 31Na (17.0 ms 4)

>Eb endpoint (keV) Ib (%) Decay mode
2880 38 b-
13636 19 4 b-
14849,5 0.4 6 b-
14984,9 0.8 3 b-
15658,3 5.4 18 b-
15880 31 8 b-