139 Eu
63 76
Half life: 17.9 s 6
Jp: (11/2)-
Decay mode: e+b+
Sn (keV): 1.14E4 sy
Sp (keV): 1.4E3 sy
Literature cut-off date: 17-Apr-1989
Author(s): T.W. Burrows
ENSDF citation: NDS 57,337 (1989)

Decay properties

Mode Branching (%) Q-value (keV)
e+b+ 100 7.02E3 sy

Gammas from 139Eu (17.9 s 6)

Eg (keV) Ig (%) Decay mode
43.8 1 e+b+
111.6 2 1.8 5 e+b+
111.9 2 21.3 24 e+b+
132.2 2 14 3 e+b+
155.3 2 31 3 e+b+
189.4 4 e+b+
190.1 2 25 e+b+
197.2 4 6.0 23 e+b+
223.5 2 6.9 15 e+b+
267.3 2 31 4 e+b+
299.5 5 3.8 18 e+b+
330.5 7 12 5 e+b+
419.5 5 3.0 15 e+b+
437.7 4 9 4 e+b+
453.4 2 15 e+b+
463.4 5 2.3 11 e+b+
486.5 4 e+b+
497.2 3 8.7 18 e+b+
659.5 3 6.9 15 e+b+
693.8 4 6 3 e+b+
701.2 4 6.3 12 e+b+
719.0 4 20 3 e+b+
741.2 3 e+b+

X-rays from 139Eu (17.9 s 6)

E (keV) I (%) Assignment
4,993 0.24 3 Sm Ll
5,589 0.107 10 Sm Lh
5,610 0.65 6 Sm La2
5,636 5.9 5 Sm La1
6,196 0.25 4 Sm Lb4
6,206 4.4 4 Sm Lb1
6,317 0.42 7 Sm Lb3
6,371 0.055 5 Sm Lb6
6,587 1.25 11 Sm Lb2
7,183 0.72 7 Sm Lg1
7,471 0.077 13 Sm Lg2
7,489 0.110 19 Sm Lg3
39,097 0.0052 3 Sm Ka3
39,522 20.7 11 Sm Ka2
40,118 37.4 21 Sm Ka1
45,294 3.66 20 Sm Kb3
45,414 7.1 4 Sm Kb1
45,741 0.105 7 Sm Kb5
46,578 2.34 13 Sm Kb2
46,705 0.89 6 Sm Kb4

Betas from 139Eu (17.9 s 6)

>Eb endpoint (keV) Ib (%) Decay mode
4617,7 10 5 b+
4821,6 16 4 b+
4839,5 12 5 b+
4977,8 3.1 17 b+
5077,9 10 6 b+
5211,2 6 3 b+
5540,2 17 3 b+
5639,7 2.7 10 e
5843,6 3.5 19 e
5861,5 2.7 9 e
5999,8 0.6 5 e
6099,9 1.9 11 e
6233,2 1.1 9 e
6562,2 2.5 12 e