149 Eu
63 86
Half life: 93.1 d 4
Jp: 5/2+
Decay mode: e
Sn (keV): 8284 18
Sp (keV): 4394 4
Prod. mode: Charged particle reaction
Literature cut-off date: 1-Dec-1994
Author(s): B. Singh
ENSDF citation: NDS 73,351 (1994)

Decay properties

Mode Branching (%) Q-value (keV)
e 100 695 4

Gammas from 149Eu (93.1 d 4)

Eg (keV) Ig (%) Decay mode
22.510 8 2.32 6 e
72.983 10 0.0141 8 e
122.0 2 0.0003 2 e
129.50 7 0.0004 2 e
130.10 4 0.0031 8 e
178.580 16 0.0185 12 e
208.283 21 0.0121 8 e
251.510 37 0.0109 12 e
254.566 23 0.636 12 e
272.21 14 0.00013 9 e
277.089 10 3.56 6 e
281.295 16 0.0226 8 e
285.95 1 0.0007 2 e
308.0 1 0.0001 1 e
327.526 10 4.03 12 e
350.016 10 0.367 12 e
376.5 2 0.00003 2 e
381.7 2 0.0035 7 e
506.093 10 0.558 13 e
528.587 10 0.508 12 e
535.897 12 0.048 3 e
558.372 10 0.052 4 e
568.36 7 0.000024 8 e
590.88 1 0.000096 8 e
613.92 2 0.00026 1 e
636.05 10 0.0003 e
636.50 5 0.00015 1 e

X-rays from 149Eu (93.1 d 4)

E (keV) I (%) Assignment
4,993 0.31 3 Sm Ll
5,589 0.126 10 Sm Lh
5,610 0.82 6 Sm La2
5,636 7.4 5 Sm La1
6,196 1.06 16 Sm Lb4
6,206 5.1 4 Sm Lb1
6,317 1.8 3 Sm Lb3
6,371 0.069 5 Sm Lb6
6,587 1.57 12 Sm Lb2
7,183 0.85 7 Sm Lg1
7,471 0.33 5 Sm Lg2
7,489 0.46 8 Sm Lg3
39,097 0.00560 20 Sm Ka3
39,522 22.1 6 Sm Ka2
40,118 40.0 11 Sm Ka1
45,294 3.91 11 Sm Kb3
45,414 7.57 22 Sm Kb1
45,741 0.112 5 Sm Kb5
46,578 2.50 7 Sm Kb2
46,705 0.95 4 Sm Kb4

Betas from 149Eu (93.1 d 4)

>Eb endpoint (keV) Ib (%) Decay mode
36,4 0.0070 11 e
58,54 0.00041 2 e
104,11 0.000120 12 e
136,63 0.141 6 e
166,4 1.11 2 e
295,91 0.0002 e
344,96 4.71 13 e
409,06 0.00064 24 e
417,92 4.51 7 e
672,49 64 4 e
695 25 4 e