153 Sm
62 91
Half life: 46.284 h 4
Jp: 3/2+
Decay mode: b-
Sn (keV): 5867.72 23
Sp (keV): 8590 72
Prod. mode: Fission product
Fast neutron activation
Thermal neutron activation
Literature cut-off date: 1-Nov-1997
Author(s): R.G. Helmer
ENSDF citation: NDS 83, 285 (1998)

Decay properties

Mode Branching (%) Q-value (keV)
b- 100 808.2 8

Gammas from 153Sm (46.284 h 4)

Eg (keV) Ig (%) Decay mode
14.06383 20 b-
19.81296 19 b-
54.1934 4 0.00194 21 b-
68.2557 5 0.0013 4 b-
69.67300 13 4.85 6 b-
75.42213 23 0.349 15 b-
83.36717 21 0.185 18 b-
89.48595 22 0.167 9 b-
96.8830 7 0.007 b-
97.43100 21 0.846 12 b-
103.18012 17 30 b-
118.1123 10 0.00024 6 b-
124.9 4 0.009 b-
151.6245 12 0.0113 15 b-
166.5556 15 0.00063 6 b-
172.3043 20 0.00042 b-
172.85307 21 0.0805 12 b-
412.05 20 0.00215 21 b-
424.51 11 0.00209 21 b-
437.13 10 0.00149 15 b-
443.2 5 0.000089 15 b-
462.0 3 0.0018 6 b-
463.64 5 0.0146 15 b-
485.0 2 0.00039 3 b-
487.75 23 0.00037 b-
509.02 12 0.0021 4 b-
521.37 3 0.0075 9 b-
530 b-
531.40 6 0.063 6 b-
533.372 25 0.032 3 b-
539.04 3 0.0218 12 b-
542.0 6 0.00229 24 b-
545.75 15 0.00089 15 b-
554.92 10 0.0049 5 b-
574.1 3 0.00016 5 b-
578.67 9 0.0034 3 b-
584.59 10 0.00116 12 b-
587.60 25 0.00045 9 b-
590.96 20 0.00110 12 b-
596.61 10 0.0116 12 b-
598.3 3 0.0021 5 b-
598.3 3 0.0021 5 b-
603.31 10 0.0046 5 b-
609.5 3 0.0146 12 b-
615.8 4 0.00060 21 b-
617.9 3 0.00075 21 b-
630.5 4 0.000101 15 b-
634.8 3 0.00051 12 b-
636.4 2 0.00221 21 b-
657.55 25 0.00040 5 b-
662.4 6 0.000021 6 b-
677.0 3 0.000045 15 b-
682.0 6 0.000027 9 b-
686.0 4 0.000232 24 b-
694.1 3 0.000021 6 b-
701.8 4 0.000030 6 b-
706.8 5 0.0000158 15 b-
713.9 3 0.000224 21 b-
719.0 4 0.000024 6 b-
760.5 4 0.000045 15 b-
763.8 6 0.000042 18 b-

X-rays from 153Sm (46.284 h 4)

E (keV) I (%) Assignment
5,177 0.185 18 Eu Ll
5,816 0.49 3 Eu La2
5,817 0.068 5 Eu Lh
5,846 4.4 3 Eu La1
6,438 0.24 4 Eu Lb4
6,457 2.85 21 Eu Lb1
6,571 0.40 6 Eu Lb3
6,617 0.043 3 Eu Lb6
6,844 0.93 6 Eu Lb2
7,484 0.48 4 Eu Lg1
7,768 0.075 12 Eu Lg2
7,795 0.107 17 Eu Lg3
40,467 0.00484 15 Eu Ka3
40,902 17.9 4 Eu Ka2
41,542 32.2 7 Eu Ka1
46,905 3.17 7 Eu Kb3
47,038 6.13 13 Eu Kb1
47,373 0.093 4 Eu Kb5
48,249 2.03 4 Eu Kb2
48,386 0.81 3 Eu Kb4

Betas from 153Sm (46.284 h 4)

>Eb endpoint (keV) Ib (%) Decay mode
44,4 0.000050 b-
47,81 0.0006 2 b-
89,51 0.0015 3 b-
95,08 0.0154 13 b-
101,58 0.0256 14 b-
106,74 0.0008 2 b-
114,02 0.025 2 b-
126,32 0.0109 7 b-
150,53 0.0009 b-
171,68 0.070 4 b-
173,61 0.065 6 b-
223,18 0.0025 2 b-
635,35 32.2 10 b-
656,57 0.036 11 b-
705,02 49.6 20 b-
710,77 0.41 5 b-
808,2 17.5 20 b-