154m Ho
67 87
Half life: 3.10 m 14
Jp: 8+
Decay mode: e+b+, a
Ex(keV): 3.2E2 11
Sn (keV): 7697 10
Sp (keV): 2785 9
E(level): 3.2E2 11 keV
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+ 100 5751 11
a <0.001 4042 4

Gammas from 154mHo (3.10 m 14)

Eg (keV) Ig (%) Decay mode
280.4 1.31 19 e+b+
289.4 2 4.9 4 e+b+
309.5 2 3.8 3 e+b+
334.6 1 94 e+b+
346.6 3 9.9 7 e+b+
405.8 4 2.9 5 e+b+
406.9 1 19.0 13 e+b+
412.4 1 79 5 e+b+
434.7 2 2.5 3 e+b+
443.3 2 5.2 4 e+b+
477.1 1 55 3 e+b+
504.7 4 ~3.7 e+b+
504.9 3 ~13 e+b+
515.6 3 1.9 3 e+b+
523.8 1 18.3 10 e+b+
570 2 10.5 6 e+b+
587.3 3 1.22 19 e+b+
587.4 3 1.22 19 e+b+
661.5 3 1.8 5 e+b+
725.1 1 12.5 8 e+b+
732.8 2 3.1 3 e+b+
740.6 2 2.3 3 e+b+
799.0 3 1.4 3 e+b+
814.1 1 14.1 9 e+b+
905.2 2 1.7 3 e+b+
959.1 3 2.4 3 e+b+
968.3 3 2.5 3 e+b+
992.9 3 5.0 5 e+b+
999.7 2 2.3 3 e+b+
1072.2 3 0.28 9 e+b+
1138.5 3 0.94 19 e+b+
1248.8 2 17.7 9 e+b+

X-rays from 154mHo (3.10 m 14)

E (keV) I (%) Assignment
5,743 0.035 4 Dy Ll
6,458 0.092 6 Dy La2
6,495 0.83 5 Dy La1
6,534 0.0126 10 Dy Lh
7,204 0.043 7 Dy Lb4
7,248 0.56 4 Dy Lb1
7,370 0.070 11 Dy Lb3
7,374 0.0087 6 Dy Lb6
7,636 0.170 12 Dy Lb2
8,426 0.098 8 Dy Lg1
8,714 0.0136 23 Dy Lg2
8,753 0.020 3 Dy Lg3
44,743 0.00104 4 Dy Ka3
45,208 2.78 9 Dy Ka2
45,998 4.97 17 Dy Ka1
51,947 0.509 17 Dy Kb3
52,113 0.98 3 Dy Kb1
52,475 0.0170 8 Dy Kb5
53,476 0.329 11 Dy Kb2
53,634 0.113 5 Dy Kb4

Betas from 154mHo (3.10 m 14)

>Eb endpoint (keV) Ib (%) Decay mode
3598,13 59 e
3878,6 1.1 e
3887,55 1.7 e
4106,3 2.4 e
4323,18 6 e

Alphas from 154mHo (3.10 m 14)

Ea (keV) Ia (%)
3721 5 100