157 Er
68 89
Half life: 18.65 m 10
Jp: 3/2-
Decay mode: e+b+
Sn (keV): 7.20E3 11
Sp (keV): 5.21E3 sy
Prod. mode: Charged particle reaction
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+b+ 100 3500 62

Gammas from 157Er (18.65 m 10)

Eg (keV) Ig (%) Decay mode
53.05 2 ~24 e+b+
57.06 0.20 e+b+
66.91 2 3.0 3 e+b+
68.60 0.17 e+b+
71.3 0.09 e+b+
83.4 1 1.73 23 e+b+
83.58 3 1.73 23 e+b+
88.6 0.13 e+b+
117.4 3 0.47 10 e+b+
121.57 11 10.1 20 e+b+
136.6 0.17 e+b+
142.0 3 0.12 3 e+b+
144.3 3 0.24 4 e+b+
150.4 1 3.0 6 e+b+
154.4 0.17 e+b+
157.8 2 0.16 3 e+b+
160.6 3 0.64 7 e+b+
168.9 0.21 e+b+
174.6 0.28 e+b+
179.8 2 1.18 6 e+b+
182.3 0.5 e+b+
183.6 0.37 e+b+
199.0 2 0.06 e+b+
201.4 2 0.21 6 e+b+
205.6 0.37 e+b+
211.8 0.26 e+b+
238.3 5 0.23 e+b+
264.7 0.37 e+b+
284.6 2 0.122 16 e+b+
302.2 2 0.34 6 e+b+
303.6 1 1.24 11 e+b+
305.1 1 0.45 7 e+b+
308.2 2 0.37 9 e+b+
317.6 2 0.51 6 e+b+
347.7 1 1.60 13 e+b+
349.5 3 0.20 6 e+b+
354.6 3 0.24 4 e+b+
357.0 2 0.50 9 e+b+
372.1 1 0.26 3 e+b+
374.6 1 0.087 18 e+b+
391.32 9 14.2 9 e+b+
398.9 2 0.14 4 e+b+
411.7 2 0.044 16 e+b+
422.8 2 0.30 6 e+b+
431.0 1 0.74 14 e+b+
436.7 2 0.10 3 e+b+
440.2 3 0.17 6 e+b+
442.7 3 0.27 9 e+b+
443.6 3 0.21 7 e+b+
456.2 1 0.14 4 e+b+
460.5 2 0.41 9 e+b+
474.4 2 0.18 6 e+b+
481.0 4 ~0.07 e+b+
482.4 3 0.14 e+b+
493.1 2 0.16 3 e+b+
502.5 3 0.27 6 e+b+
503.5 2 0.84 6 e+b+
517.3 3 0.26 7 e+b+
518.5 3 0.34 10 e+b+
524.4 0.9 e+b+
527.8 1 0.68 9 e+b+
538.1 3 <0.16 e+b+
549.1 1 2.7 3 e+b+
560.9 3 0.09 3 e+b+
564.4 1 0.22 3 e+b+
569.0 e+b+
574.0 1 0.45 6 e+b+
584.0 1 0.53 6 e+b+
611.0 1 0.68 7 e+b+
614.7 1 0.13 4 e+b+
641.0 0.28 3 e+b+
651.8 1 0.47 6 e+b+
672.0 2 0.24 4 e+b+
673.5 2 0.31 4 e+b+
694.6 1 0.18 7 e+b+
719.5 5 0.14 e+b+
735.6 2 <0.14 e+b+
747.5 0.50 4 e+b+
785.8 2 0.28 6 e+b+
792.6 2 0.28 3 e+b+
796.0 2 0.16 3 e+b+
807.5 0.34 4 e+b+
816.7 2 e+b+
824.8 2 e+b+
889.7 e+b+
910.6 3 0.26 7 e+b+
921.1 1 0.075 10 e+b+
942.0 2 0.26 6 e+b+
960.7 2 0.21 7 e+b+
972.2 2 e+b+
980.5 2 0.114 24 e+b+
1026.4 2 0.16 4 e+b+
1028.7 2 0.11 6 e+b+
1114.7 1 0.19 3 e+b+
1129.0 2 0.17 6 e+b+
1137.8 2 0.057 18 e+b+
1141.2 2 e+b+
1142.8 2 0.27 7 e+b+
1148.3 3 <0.21 e+b+
1154.0 3 0.17 6 e+b+
1184.5 3 0.060 24 e+b+
1196.0 2 0.30 6 e+b+
1205.5 3 0.18 6 e+b+
1226.2 5 <0.09 e+b+
1228.9 3 0.24 6 e+b+
1238.1 1 0.24 7 e+b+
1242.7 1 0.47 9 e+b+
1246.9 2 e+b+
1278.8 2 0.20 7 e+b+
1310.2 2 0.16 6 e+b+
1312.5 3 0.10 4 e+b+
1373.7 2 0.26 7 e+b+
1378.4 3 0.20 6 e+b+
1391.7 2 0.26 7 e+b+
1396.4 3 0.18 6 e+b+
1398.2 2 0.26 7 e+b+
1403.4 4 0.14 e+b+
1422.5 2 0.89 13 e+b+
1433.1 2 0.44 9 e+b+
2170.0 5 0.50 6 e+b+
2217.5 3 0.31 4 e+b+

X-rays from 157Er (18.65 m 10)

E (keV) I (%) Assignment
5,943 0.23 3 Ho Ll
6,680 0.59 5 Ho La2
6,720 5.3 5 Ho La1
6,790 0.078 7 Ho Lh
7,471 0.38 6 Ho Lb4
7,526 3.5 3 Ho Lb1
7,635 0.058 5 Ho Lb6
7,653 0.60 10 Ho Lb3
7,910 1.08 9 Ho Lb2
8,757 0.62 6 Ho Lg1
9,051 0.118 20 Ho Lg2
9,088 0.17 3 Ho Lg3
46,223 0.0068 5 Ho Ka3
46,700 16.7 10 Ho Ka2
47,547 29.7 19 Ho Ka1
53,695 3.07 19 Ho Kb3
53,876 5.9 4 Ho Kb1
54,246 0.108 8 Ho Kb5
55,293 1.99 12 Ho Kb2
55,457 0.62 4 Ho Kb4

Betas from 157Er (18.65 m 10)

>Eb endpoint (keV) Ib (%) Decay mode
1928,85 0.69 11 b+
2086,68 3.7 6 b+
2303,45 7.4 19 b+
2950,85 2.7 3 e
3108,68 11 2 e
3325,45 17 4 e