38 K
19 19
Half life: 7.636 m 18
Jp: 3+
Decay mode: e+b+
Sn (keV): 12073.8 8
Sp (keV): 5142.6 8
Prod. mode: Charged particle reaction
Photon reaction
Fast neutron activation
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 5913.1 6

Gammas from 38K (7.636 m 18)

Eg (keV) Ig (%) Decay mode
1769.13 0.0094 13 e+b+
2167.405 99.858 13 e+b+
3936.43 0.142 11 e+b+

X-rays from 38K (7.636 m 18)

E (keV) I (%) Assignment
0,251 5.7E-05 17 Ar Lb1
0,310 1.5E-05 5 Ar Lb4
0,310 2.4E-05 8 Ar Lb3
2,880 1.91E-09 20 Ar Ka3
2,955 0.0178 19 Ar Ka2
2,957 0.036 4 Ar Ka1
3,190 0.00145 15 Ar Kb3
3,190 0.0029 3 Ar Kb1

Betas from 38K (7.636 m 18)

>Eb endpoint (keV) Ib (%) Decay mode
954,45 0.133 11 b+
1080,88 0.009 b+
1976,45 0.0177 14 e
2102,88 0.0008 e
2723,63 99.333 12 b+
3745,63 0.5163 1 e