151 Er
68 83
Half life: 23.5 s 13
Jp: (7/2-)
Decay mode: e+b+
Sn (keV): 8.4E3 sy
Sp (keV): 3.5E3 sy
Literature cut-off date: 15-Jan-1997
Author(s): B. Singh
ENSDF citation: NDS 80, 263 (1997)

Decay properties

Mode Branching (%) Q-value (keV)
e+b+ 100 5.4E3 sy

Gammas from 151Er (23.5 s 13)

Eg (keV) Ig (%) Decay mode
100.1 1 8.9 16 e+b+
230.7 2 1.05 13 e+b+
256.5 1 17.1 16 e+b+
302.4 2 2.13 16 e+b+
455.0 2 1.90 13 e+b+
462.0 2 1.61 13 e+b+
537.0 2 1.7 5 e+b+
553.0 1 5.6 5 e+b+
558.8 1 4.1 4 e+b+
638.3 1 33 e+b+
641.5 1 5.6 7 e+b+
667.2 1 16.7 10 e+b+
694.4 1 4.7 5 e+b+
720.6 2 3.2 7 e+b+
739.5 1 4.1 7 e+b+
768.9 2 2.7 3 e+b+
860.5 1 4.4 6 e+b+
868.9 1 10.8 10 e+b+
874.4 2 2.0 6 e+b+
898.0 2 2.9 5 e+b+
987.9 2 4.2 6 e+b+
992.0 2 5.3 7 e+b+
1061.0 4 ~0.8 e+b+
1073.0 2 ~1.2 e+b+
1194.5 2 5.8 7 e+b+
1435.2 2 5.8 4 e+b+
1549.3 3 3.2 5 e+b+
1935.1 3 3.6 7 e+b+
2133.7 3 1.3 3 e+b+

X-rays from 151Er (23.5 s 13)

E (keV) I (%) Assignment
5,943 0.21 3 Ho Ll
6,680 0.56 5 Ho La2
6,720 5.0 5 Ho La1
6,790 0.072 7 Ho Lh
7,471 0.30 5 Ho Lb4
7,526 3.3 3 Ho Lb1
7,635 0.054 5 Ho Lb6
7,653 0.48 8 Ho Lb3
7,910 1.01 10 Ho Lb2
8,757 0.57 6 Ho Lg1
9,051 0.094 17 Ho Lg2
9,088 0.135 24 Ho Lg3
46,223 0.0069 5 Ho Ka3
46,700 16.9 13 Ho Ka2
47,547 30.1 23 Ho Ka1
53,695 3.11 23 Ho Kb3
53,876 6.0 5 Ho Kb1
54,246 0.109 9 Ho Kb5
55,293 2.02 15 Ho Kb2
55,457 0.63 5 Ho Kb4

Betas from 151Er (23.5 s 13)

>Eb endpoint (keV) Ib (%) Decay mode
2431,1 1.1 3 b+
2516,9 2.0 5 b+
2545,1 7 2 b+
2813,8 3.4 7 b+
2836,7 0.9 3 b+
3000,1 1.1 4 b+
3098,1 0.4 b+
3175,9 0.4 1 b+
3249 3.3 6 b+
3376,4 2.6 5 b+
3443,4 1.0 4 b+
3453,1 2.1 4 e
3468 1.6 3 b+
3508,9 1.2 8 b+
3516,3 2.0 5 b+
3538,9 3.3 7 e
3567,1 12 2 e
3678,1 4.1 5 b+
3711,1 6.7 11 b+
3739,6 10.7 13 b+
3835,8 4.2 8 e
3858,7 1.1 4 e
3980,4 5.2 16 b+
4022,1 1.1 4 e
4120,1 0.4 e
4197,9 0.4 1 e
4271 2.5 6 e
4398,4 1.8 4 e
4465,4 0.7 3 e
4490 1.1 3 e
4530,9 0.7 5 e
4538,3 1.2 4 e
4700,1 2.2 4 e
4733,1 3.5 8 e
4761,6 5.5 11 e
5002,4 2.3 8 e