157 Tb
65 92
Half life: 71 y 7
Jp: 3/2+
Decay mode: e
Sn (keV): 8744 4
Sp (keV): 5517.6 3
Prod. mode: Thermal neutron activation
Literature cut-off date: 1-Mar-1996
Author(s): R.G. Helmer
ENSDF citation: NDS 78,219 (1996)

Decay properties

Mode Branching (%) Q-value (keV)
e 100 60.1 3

Gammas from 157Tb (71 y 7)

Eg (keV) Ig (%) Decay mode
54.548 9 0.0084 8 e

X-rays from 157Tb (71 y 7)

E (keV) I (%) Assignment
5,362 0.136 17 Gd Ll
6,026 0.36 3 Gd La2
6,050 0.057 4 Gd Lh
6,058 3.2 3 Gd La1
6,687 1.38 21 Gd Lb4
6,713 2.43 19 Gd Lb1
6,832 2.3 4 Gd Lb3
6,867 0.032 3 Gd Lb6
7,102 0.67 7 Gd Lb2
7,243 0.0055 5 Gd Lb5
7,790 0.41 3 Gd Lg1
7,930 0.0034 4 Gd Lg6
8,087 0.44 7 Gd Lg2
8,105 0.61 10 Gd Lg3
41,864 0.00129 5 Gd Ka3
42,309 4.20 12 Gd Ka2
42,996 7.58 22 Gd Ka1
48,551 0.751 22 Gd Kb3
48,695 1.45 4 Gd Kb1
49,038 0.0229 10 Gd Kb5
49,959 0.486 14 Gd Kb2
50,099 0.188 9 Gd Kb4

Betas from 157Tb (71 y 7)

>Eb endpoint (keV) Ib (%) Decay mode
5,57 0.11 1 e
60,1 99.89 1 e