148m Tb
65 83
Half life: 2.20 m 5
Jp: 9+
Decay mode: e+b+
Ex(keV): 90.1 3
Sn (keV): 7828 32
Sp (keV): 2437 30
E(level): 90.1 3 keV
Prod. mode: Charged particle reaction
Literature cut-off date: 31-Jul-1989
Author(s): L.K. Peker
ENSDF citation: NDS 59,393 (1990)

Decay properties

Mode Branching (%) Q-value (keV)
e+b+ 100 5765 30

Gammas from 148mTb (2.20 m 5)

Eg (keV) Ig (%) Decay mode
129.5 2 2.5 4 e+b+
142.878 14 2.4 3 e+b+
394.6 86 5 e+b+
481.65 10 3.0 4 e+b+
489.049 12 5.2 5 e+b+
631.947 17 95 5 e+b+
752.8 2 1.7 2 e+b+
784.430 16 100 e+b+
808.56 7 2.9 3 e+b+
882.3 10.0 4 e+b+

X-rays from 148mTb (2.20 m 5)

E (keV) I (%) Assignment
5,362 0.185 19 Gd Ll
6,026 0.49 3 Gd La2
6,050 0.066 5 Gd Lh
6,058 4.4 3 Gd La1
6,687 0.26 4 Gd Lb4
6,713 2.79 22 Gd Lb1
6,832 0.42 7 Gd Lb3
6,867 0.043 3 Gd Lb6
7,102 0.92 7 Gd Lb2
7,243 0.0075 5 Gd Lb5
7,790 0.48 4 Gd Lg1
7,930 0.0039 4 Gd Lg6
8,087 0.081 13 Gd Lg2
8,105 0.114 19 Gd Lg3
41,864 0.00524 24 Gd Ka3
42,309 17.1 7 Gd Ka2
42,996 30.9 12 Gd Ka1
48,551 3.06 12 Gd Kb3
48,695 5.92 23 Gd Kb1
49,038 0.093 5 Gd Kb5
49,959 1.98 8 Gd Kb2
50,099 0.77 4 Gd Kb4

Betas from 148mTb (2.20 m 5)

>Eb endpoint (keV) Ib (%) Decay mode
2134,8 26 b+
3156,8 71 e