163 Er
68 95
Half life: 75.0 m 4
Jp: 5/2-
Decay mode: e+b+
Sn (keV): 6903 5
Sp (keV): 6416 6
Prod. mode: Charged particle reaction
Fast neutron activation
Thermal neutron activation
Literature cut-off date: 30-Oct-1988
Author(s): T.W. Burrows
Update: 3-May-1996, B. Singh
ENSDF citation: NDS 56,313 (1989)

Decay properties

Mode Branching (%) Q-value (keV)
e+b+ 100 1210 5

Gammas from 163Er (75.0 m 4)

Eg (keV) Ig (%) Decay mode
9.8 e+b+
52.74 10 e+b+
62.48 10 e+b+
80.5 ~0.00046 e+b+
84.45 10 e+b+
100.04 10 0.00169 9 e+b+
123.52 10 0.00021 6 e+b+
164.6 2 0.00046 6 e+b+
192.6 2 0.00051 5 e+b+
253.9 2 0.00038 6 e+b+
297.88 10 0.012 e+b+
331.12 10 0.00021 6 e+b+
339.95 10 0.00334 12 e+b+
417.1 2 0.00087 8 e+b+
431.16 10 0.00144 10 e+b+
436.1 1 0.0285 6 e+b+
439.94 10 0.0276 6 e+b+
444.8 2 0.00091 10 e+b+
452.3 2 0.00069 7 e+b+
484.0 3 0.00028 6 e+b+
552.0 3 0.00032 8 e+b+
558.5 2 0.00059 10 e+b+
568.4 2 0.00086 9 e+b+
578.1 2 0.00133 10 e+b+
614.3 1 0.00334 12 e+b+
711.3 2 0.00123 10 e+b+
875.8 2 0.0069 4 e+b+
1013.6 3 0.00086 10 e+b+
1113.5 3 0.0490 14 e+b+

X-rays from 163Er (75.0 m 4)

E (keV) I (%) Assignment
5,943 0.29 3 Ho Ll
6,680 0.74 5 Ho La2
6,720 6.7 4 Ho La1
6,790 0.096 7 Ho Lh
7,471 0.42 6 Ho Lb4
7,526 4.3 3 Ho Lb1
7,635 0.072 5 Ho Lb6
7,653 0.67 10 Ho Lb3
7,910 1.35 9 Ho Lb2
8,757 0.76 6 Ho Lg1
9,051 0.133 22 Ho Lg2
9,088 0.19 3 Ho Lg3
46,223 0.0092 3 Ho Ka3
46,700 22.4 6 Ho Ka2
47,547 39.9 11 Ho Ka1
53,695 4.12 12 Ho Kb3
53,876 7.98 23 Ho Kb1
54,246 0.145 7 Ho Kb5
55,293 2.67 8 Ho Kb2
55,457 0.84 4 Ho Kb4

Betas from 163Er (75.0 m 4)

>Eb endpoint (keV) Ib (%) Decay mode
96,43 0.05 1 e
188 0.0030 b+
334 0.040 8 e
595,71 0.0038 8 e
770,06 0.0014 10 e
778,82 0.0012 3 e
902,36 0.0114 22 e
1210 99.888 21 e