154 Ho
67 87
Half life: 11.76 m 19
Jp: (2)-
Decay mode: e+b+, a
Sn (keV): 7697 10
Sp (keV): 2785 9
Literature cut-off date: 1-Mar-1993
Author(s): R.G. Helmer
ENSDF citation: NDS 69,507 (1993)

Decay properties

Mode Branching (%) Q-value (keV)
e+b+ 99.981 5 5751 11
a 0.019 5 4042 4

Gammas from 154Ho (11.76 m 19)

Eg (keV) Ig (%) Decay mode
152.7 3 0.50 8 e+b+
182.0 4 0.64 13 e+b+
244.2 4 0.42 13 e+b+
326.2 3 4.7 8 e+b+
334.6 1 84 e+b+
346.6 3 1.0 1 e+b+
363.4 4 0.35 17 e+b+
366.2 3 1.07 14 e+b+
397.3 2 e+b+
412.4 1 15.0 8 e+b+
415.8 4 0.40 9 e+b+
429.1 4 0.45 11 e+b+
460.9 3 0.92 8 e+b+
480.0 4 0.22 8 e+b+
485.3 3 0.56 8 e+b+
504.9 3 1.50 14 e+b+
515.2 4 0.41 17 e+b+
569 1 11.1 6 e+b+
570 2 11.1 6 e+b+
587.4 3 0.79 8 e+b+
602.9 4 0.30 8 e+b+
610.6 5 0.30 14 e+b+
642.8 4 0.46 21 e+b+
660.8 2 e+b+
692.5 2 5.1 3 e+b+
695.5 3 1.08 9 e+b+
723.6 5 0.17 8 e+b+
729.7 3 1.23 10 e+b+
755.1 5 0.55 11 e+b+
799.0 3 0.56 8 e+b+
846.6 3 0.95 9 e+b+
873.4 1 12.5 8 e+b+
876.6 3 0.61 8 e+b+
905.2 2 2.19 20 e+b+
999.7 2 3.26 20 e+b+
1027.1 2 5.7 3 e+b+
1055.8 3 0.96 12 e+b+
1058.4 6 e+b+
1072.2 3 1.00 13 e+b+
1085.9 3 1.64 14 e+b+
1108.0 4 0.68 17 e+b+
1156.8 4 0.48 24 e+b+
1173.2 2 1.78 15 e+b+
1244.6 3 0.34 8 e+b+
1300.6 2 3.78 24 e+b+
1390.0 4 0.49 11 e+b+
1420.3 3 2.03 19 e+b+
1431.0 3 0.57 11 e+b+
1447.1 4 0.50 11 e+b+
1498.3 3 1.42 14 e+b+
1502.5 4 0.65 11 e+b+
1507.6 4 0.75 15 e+b+
1510.3 3 1.86 16 e+b+
1542.7 5 0.89 12 e+b+
1611.2 5 0.31 13 e+b+
1623.7 5 0.68 13 e+b+
1656.5 3 1.39 14 e+b+
1813.8 5 0.54 10 e+b+
1834.1 4 1.00 12 e+b+
1843.8 5 0.51 11 e+b+
1849.3 4 0.92 12 e+b+
1877.1 6 0.46 12 e+b+
1937.8 5 0.62 13 e+b+
2010.3 6 0.52 10 e+b+

X-rays from 154Ho (11.76 m 19)

E (keV) I (%) Assignment
5,743 0.0210 23 Dy Ll
6,458 0.055 4 Dy La2
6,495 0.49 4 Dy La1
6,534 0.0075 7 Dy Lh
7,204 0.026 4 Dy Lb4
7,248 0.33 3 Dy Lb1
7,370 0.043 7 Dy Lb3
7,374 0.0052 4 Dy Lb6
7,636 0.101 8 Dy Lb2
8,426 0.058 5 Dy Lg1
8,714 0.0083 14 Dy Lg2
8,753 0.0119 21 Dy Lg3
44,743 0.00062 4 Dy Ka3
45,208 1.66 9 Dy Ka2
45,998 2.96 15 Dy Ka1
51,947 0.304 16 Dy Kb3
52,113 0.59 3 Dy Kb1
52,475 0.0101 6 Dy Kb5
53,476 0.196 10 Dy Kb2
53,634 0.068 4 Dy Kb4

Betas from 154Ho (11.76 m 19)

>Eb endpoint (keV) Ib (%) Decay mode
4115,81 3.8 e
4243,35 4.0 e
4308,33 2.2 e
4330,61 4.1 e
4360,7 4.9 e
4499,14 2.7 e
4542,98 12.5 9 e
4692,92 2.2 e
4723,89 9.6 6 e
4845,81 10.4 8 e
5003,96 7.2 10 e
5416,42 15.7 18 e

Alphas from 154Ho (11.76 m 19)

Ea (keV) Ia (%)
3937 5 100