161 Ho
67 94
Half life: 2.48 h 5
Jp: 7/2-
Decay mode: e
Sn (keV): 8885 15
Sp (keV): 4813 3
Prod. mode: Charged particle reaction
Fast neutron activation
Literature cut-off date: 1-Jul-1988
Author(s): R.G. Helmer
ENSDF citation: NDS 59,1 (1990)

Decay properties

Mode Branching (%) Q-value (keV)
e 100 859 3

Gammas from 161Ho (2.48 h 5)

Eg (keV) Ig (%) Decay mode
18.15 5 e
25.65150 7 27 3 e
28.701 12 e
43.821 1 0.39 8 e
48.91562 14 0.12 4 e
56.64 3 e
57.196 1 0.055 12 e
59.235 2 0.60 5 e
69.29 5 e
74.56711 22 0.117 12 e
77.414 1 1.91 16 e
81.196 1 0.055 8 e
83.83 5 e
84.86 5 e
87.942 1 0.012 6 e
98.028 3 0.152 12 e
100.413 9 <0.05 e
100.707 10 <0.05 e
101.990 1 e
103.062 1 3.9 e
106.108 1 e
107.74 5 <0.00039 e
109.83 4 e
112.549 2 0.0035 6 e
119.61 5 0.0010 3 e
131.8 1 <0.0012 e
138.385 2 0.0176 16 e
140.40 10 <0.0023 e
157.267 1 0.49 4 e
175.433 2 0.43 4 e
183.179 1 0.0082 12 e
187.3 2 0.0017 3 e
212.80 15 0.0009 3 e
217.60 10 <0.00012 e
238.481 2 0.00070 23 e
252 <0.00019 e
292.409 1 e
319.673 1 0.00066 23 e
341.320 2 e
348.371 3 e
376.869 5 e
425.784 4 e
577.9 2 0.00051 19 e
658.95 10 0.0024 3 e
669.0 3 0.00012 6 e
672.5 3 0.00018 6 e
687.614 24 0.0049 4 e
716.09 8 0.0037 4 e
728.2 <0.0010 e
746.89 6 0.0048 5 e
764.984 16 0.0170 14 e
772.10 10 0.00066 23 e
790.61 3 0.0141 12 e

X-rays from 161Ho (2.48 h 5)

E (keV) I (%) Assignment
5,743 0.47 5 Dy Ll
6,458 1.21 10 Dy La2
6,495 10.9 9 Dy La1
6,534 0.167 15 Dy Lh
7,204 0.96 16 Dy Lb4
7,248 7.4 7 Dy Lb1
7,370 1.55 25 Dy Lb3
7,374 0.115 10 Dy Lb6
7,636 2.25 19 Dy Lb2
8,426 1.29 12 Dy Lg1
8,714 0.30 5 Dy Lg2
8,753 0.43 8 Dy Lg3
44,743 0.0093 4 Dy Ka3
45,208 24.8 8 Dy Ka2
45,998 44.2 14 Dy Ka1
51,947 4.53 14 Dy Kb3
52,113 8.8 3 Dy Kb1
52,475 0.151 7 Dy Kb5
53,476 2.93 9 Dy Kb2
53,634 1.01 5 Dy Kb4

Betas from 161Ho (2.48 h 5)

>Eb endpoint (keV) Ib (%) Decay mode
68,35 0.05 1 e
646,05 0.35 7 e
657,91 1.8 3 e
727,24 0.6 2 e
755,94 19 3 e
815,18 2.5 9 e
833,35 76 14 e