21 Mg
12 9
Half life: 122 ms 3
Jp: (3/2,5/2)+
Decay mode: e+b+, ep
Sn (keV): 14730 32
Sp (keV): 3222 18
Prod. mode: Charged particle reaction
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)
e+b+ 100 13096 16
ep 29.3

Gammas from 21Mg (122 ms 3)

Eg (keV) Ig (%) Decay mode
331.91 10 51 5 e+b+
1384.1 3 10.1 19 e+b+
1633.602 15 9.0 10 ep
1715.9 7 0.65 19 e+b+
2613.8 11 0.87 11 ep
3332.54 20 0.66 7 ep
4965.85 20 0.0040 20 ep

X-rays from 21Mg (122 ms 3)

E (keV) I (%) Assignment
1,009 7.5E-11 11 Na Ka3
1,041 0.0125 18 Na Ka2
1,041 0.025 4 Na Ka1