150m Eu
63 87
Half life: 12.8 h 1
Jp: 0-
Decay mode: e+b+, b-, IT
Ex(keV): 42.1
Sn (keV): 6420 7
Sp (keV): 4943 7
E(level): 42.1 keV
Prod. mode: Charged particle reaction
Fast neutron activation
Literature cut-off date: 1-Mar-1995
Author(s): E. derMateosian and J.K. Tuli
ENSDF citation: NDS 75,827 (1995)

Decay properties

Mode Branching (%) Q-value (keV)
e+b+ 11 2 2261 7
b- 89 2 971 4
IT <5E-8

Gammas from 150mEu (12.8 h 1)

Eg (keV) Ig (%) Decay mode
126 * b-
209.36 2 0.022 3 e+b+
222.8 3 * b-
275.6 3 * b-
303.1 5 * b-
305.68 3 ~0.0032 e+b+
333.971 12 4.0 3 e+b+
406.52 5 2.81 24 e+b+
425.10 7 0.0079 16 e+b+
514.9 e+b+
620.8 4 0.032 5 e+b+
712.205 15 0.131 12 e+b+
740.4 5 e+b+
740.6 1 e+b+
831.92 25 0.198 16 e+b+
859.867 18 0.0091 24 e+b+
917.44 16 0.044 8 e+b+
921.2 3 0.210 16 e+b+
997.8 2 * b-
1045.873 12 0.0083 20 e+b+
1165.74 3 0.257 24 e+b+
1193.826 24 0.018 4 e+b+
1223.28 6 0.198 16 e+b+
1452.9 10 0.015 5 e+b+
1615.4 4 * b-
1629.79 4 0.057 8 e+b+
1963.71 8 0.115 12 e+b+
2189.1 * b-
2201.3 3 * b-
2258.7 5 * b-
2329.6 5 * b-
2494.6 4 * b-
2532.3 4 * b-
2669.0 3 * b-
2808.0 3 * b-
2841.3 5 * b-
2895.0 5 * b-
2993.4 5 * b-
3024.5 5 * b-
3096.3 4 * b-
3134.7 4 * b-
3168.3 4 * b-
3262.3 4 * b-
3327.8 5 * b-
3352.3 5 * b-
3374 1 * b-
3440.8 5 * b-
3448.1 5 * b-
3484.5 5 * b-
3489.7 5 * b-
3523 1 * b-
3551 2 * b-
3555 2 * b-
3735 2 * b-
3774 2 * b-
3817 2 * b-
3836 2 * b-
3846 2 * b-
3927 2 * b-

X-rays from 150mEu (12.8 h 1)

E (keV) I (%) Assignment
4,993 0.0239 24 Sm Ll
5,589 0.0089 7 Sm Lh
5,610 0.064 4 Sm La2
5,636 0.58 4 Sm La1
6,196 0.034 5 Sm Lb4
6,206 0.36 3 Sm Lb1
6,317 0.057 9 Sm Lb3
6,371 0.0054 3 Sm Lb6
6,587 0.122 8 Sm Lb2
7,183 0.060 5 Sm Lg1
7,471 0.0106 17 Sm Lg2
7,489 0.0151 25 Sm Lg3
39,097 0.000628 23 Sm Ka3
39,522 2.47 7 Sm Ka2
40,118 4.48 13 Sm Ka1
45,294 0.438 13 Sm Kb3
45,414 0.848 25 Sm Kb1
45,741 0.0126 6 Sm Kb5
46,578 0.280 8 Sm Kb2
46,705 0.106 5 Sm Kb4

Betas from 150mEu (12.8 h 1)

>Eb endpoint (keV) Ib (%) Decay mode
339,44 0.41 10 e
516,5 0.050 14 e
540,72 0.013 3 b+
947,24 0.005 4 b+
1047,7 0.27 7 e
1109,37 0.027 7 e
1137,49 0.43 11 e
1257,06 0.080 25 e
1281,1 0.66 24 b+
1562,72 2.7 7 e
1969,24 0.6 4 e
2303,1 6.2 22 e