153 Er
68 85
Half life: 37.1 s 2
Jp: (7/2-)
Decay mode: a, e+b+
Sn (keV): 8058 34
Sp (keV): 4166 32
Prod. mode: Charged particle reaction
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)
a 53 3 4802.7 15
e+b+ 47 3 4563 11

Gammas from 153Er (37.1 s 2)

Eg (keV) Ig (%) Decay mode
68.7 e+b+
94.5 2 0.032 21 e+b+
188.0 2 7.2 4 e+b+
351.2 2 21.15 21 e+b+
377.5 2 6.1 4 e+b+
398.4 2 11.4 17 e+b+
449.4 2 1.7 4 e+b+
463.6 2 1.27 21 e+b+
565.5 2 0.63 21 e+b+
575.4 2 1.06 21 e+b+
1150.6 2 2.5 4 e+b+
1166.4 1.5 e+b+
1301.4 2.5 e+b+
1348.9 3 3.2 4 e+b+
1700.1 3 0.63 21 e+b+

X-rays from 153Er (37.1 s 2)

E (keV) I (%) Assignment
5,943 0.019 6 Ho Ll
6,680 0.050 15 Ho La2
6,720 0.45 14 Ho La1
6,790 0.007 3 Ho Lh
7,471 0.023 6 Ho Lb4
7,526 0.32 12 Ho Lb1
7,635 0.0048 15 Ho Lb6
7,653 0.037 9 Ho Lb3
7,910 0.09 3 Ho Lb2
8,757 0.056 22 Ho Lg1
9,051 0.0072 18 Ho Lg2
9,088 0.010 3 Ho Lg3
46,223 0.00053 9 Ho Ka3
46,700 1.30 22 Ho Ka2
47,547 2.3 4 Ho Ka1
53,695 0.24 4 Ho Kb3
53,876 0.46 8 Ho Kb1
54,246 0.0084 15 Ho Kb5
55,293 0.16 3 Ho Kb2
55,457 0.049 9 Ho Kb4

Betas from 153Er (37.1 s 2)

>Eb endpoint (keV) Ib (%) Decay mode
2762,4 1.5 e
2862,9 6 e
3412,4 2.5 e
3636,4 1.1 e
3748,2 1.3 e
3856,9 1.7 e
3928,8 6 e
4164,6 9 e
4211,8 17 e
4306,3 0.24 e

Alphas from 153Er (37.1 s 2)

Ea (keV) Ia (%)
4518
4674 2 100