146 Pm
61 85
Half life: 5.53 y 5
Jp: 3-
Decay mode: e, b-
Sn (keV): 6257 5
Sp (keV): 5311 4
Prod. mode: Charged particle reaction
Literature cut-off date: 30-Sep-1997
Author(s): L.K. Peker and J.K. Tuli
ENSDF citation: NDS 82, 187 (1997)

Decay properties

Mode Branching (%) Q-value (keV)
e 66.0 13 1472 4
b- 34.0 13 1542 3

Gammas from 146Pm (5.53 y 5)

Eg (keV) Ig (%) Decay mode
146.4 5 0.21 3 e+b+
453.88 6 65 2 e+b+
589.3 1 0.42 9 e+b+
633.083 23 2.15 20 b-
735.72 6 22.5 15 e+b+
747.159 16 34.0 16 b-

X-rays from 146Pm (5.53 y 5)

E (keV) I (%) Assignment
4,633 0.131 13 Nd Ll
4,993 0.00037 4 Sm Ll
5,146 0.051 4 Nd Lh
5,208 0.353 22 Nd La2
5,230 3.18 20 Nd La1
5,589 1.38E-04 12 Sm Lh
5,610 0.00098 7 Sm La2
5,636 0.0088 7 Sm La1
5,722 1.97 15 Nd Lb1
5,723 0.20 3 Nd Lb4
5,829 0.34 5 Nd Lb3
5,893 0.0279 18 Nd Lb6
6,090 0.68 5 Nd Lb2
6,196 0.00046 7 Sm Lb4
6,206 0.0056 5 Sm Lb1
6,317 0.00077 12 Sm Lb3
6,371 8.2E-05 6 Sm Lb6
6,587 0.00187 15 Sm Lb2
6,604 0.315 25 Nd Lg1
6,883 0.062 10 Nd Lg2
6,901 0.087 14 Nd Lg3
7,183 0.00093 8 Sm Lg1
7,471 1.43E-04 24 Sm Lg2
7,489 2.0E-04 3 Sm Lg3
36,443 0.00298 11 Nd Ka3
36,847 14.9 4 Nd Ka2
37,361 27.1 8 Nd Ka1
39,097 9.5E-06 5 Sm Ka3
39,522 0.0375 18 Sm Ka2
40,118 0.068 3 Sm Ka1
42,166 2.61 8 Nd Kb3
42,271 5.05 15 Nd Kb1
42,580 0.068 3 Nd Kb5
43,335 1.65 5 Nd Kb2
43,451 0.61 3 Nd Kb4
45,294 0.0066 3 Sm Kb3
45,414 0.0128 6 Sm Kb1
45,741 1.90E-04 11 Sm Kb5
46,578 0.00424 21 Sm Kb2
46,705 0.00161 10 Sm Kb4

Betas from 146Pm (5.53 y 5)

>Eb endpoint (keV) Ib (%) Decay mode
161,73 2.10 20 b-
282,38 22 4 e
429,78 0.7 3 e
794,89 31 4 b-
1018,23 44 6 e