49 K
19 30
Half life: 1.26 s 5
Jp: (3/2+)
Decay mode: b-, b-n
Sn (keV): 6267 74
Sp (keV): 1.44E4 sy
Literature cut-off date: 14-Sep-1995
Author(s): T.W. Burrows
ENSDF citation: NDS 76,191 (1995)

Decay properties

Mode Branching (%) Q-value (keV)
b- 100 10970 70
b-n 86 9

Gammas from 49K (1.26 s 5)

Eg (keV) Ig (%) Decay mode
451.6 1 8 1* b-n
2023.16 30 0.4 b-
2249 1.54 28 b-
3585.0 0.2 b-
3832.2 5 100* b-n
4072 0.2 b-
4272 1.76 28 b-
4284 * b-n

X-rays from 49K (1.26 s 5)

E (keV) I (%) Assignment
0,350 6.4E-09 18 Ca Lb1
0,412 1.6E-09 5 Ca Lb4
0,412 2.5E-09 8 Ca Lb3
3,688 2.04E-06 24 Ca Ka2
3,692 4.1E-06 5 Ca Ka1
4,013 2.14E-07 25 Ca Kb3
4,013 4.2E-07 5 Ca Kb1

Betas from 49K (1.26 s 5)

>Eb endpoint (keV) Ib (%) Decay mode
870 0.05 1 b-
1390 0.10 2 b-
1690 0.10 2 b-
1870 0.2 b-
2300 0.30 6 b-
2580 1.0 2 b-
3098 0.5 1 b-
3170 0.3 2 b-
3358 0.3 1 b-
3635 1.4 4 b-
3690 2.5 6 b-
3900 9.2 18 b-
4046 1.4 4 b-
4420 17.6 21 b-
4457 14 3 b-
4594 2.1 4 b-
4640 8.0 16 b-
5358 8.4 19 b-
5402 13 3 b-
5661 6.7 7 b-
6698 3.3 b-
6898 0.2 b-
7385 0.2 b-
8946,8 0.4 b-
10970 10 b-