146m Tb
65 81
Half life: 23 s 2
Jp: 5-
Decay mode: e+b+
Ex(keV): 0+x
Sn (keV): 9.66E3 sy
Sp (keV): 2172 58
Literature cut-off date: 30-Sep-1997
Author(s): L.K. Peker and J.K. Tuli
ENSDF citation: NDS 82, 187 (1997)

Decay properties

Mode Branching (%) Q-value (keV)
e+b+ 100 8267 45

Gammas from 146mTb (23 s 2)

Eg (keV) Ig (%) Decay mode
116.7 e+b+
324.0 1 0.8 3 e+b+
440.9 1 13.1 9 e+b+
654.8 4 2.6 3 e+b+
987.6 4 1.0 3 e+b+
1032.1 1 2.9 3 e+b+
1078.6 1 51.6 26 e+b+
1296.7 e+b+
1417.2 3 17.2 11 e+b+
1579.3 1 100 e+b+
1831.9 e+b+
1843.3 5 e+b+
1972.0 3 0.29 e+b+
2060.9 e+b+
3139.6 4 11.7 8 e+b+

X-rays from 146mTb (23 s 2)

E (keV) I (%) Assignment
5,362 0.061 6 Gd Ll
6,026 0.160 10 Gd La2
6,050 0.0215 16 Gd Lh
6,058 1.44 9 Gd La1
6,687 0.084 13 Gd Lb4
6,713 0.92 7 Gd Lb1
6,832 0.138 21 Gd Lb3
6,867 0.0143 9 Gd Lb6
7,102 0.301 20 Gd Lb2
7,243 0.00246 15 Gd Lb5
7,790 0.156 12 Gd Lg1
7,930 0.00128 14 Gd Lg6
8,087 0.027 4 Gd Lg2
8,105 0.037 6 Gd Lg3
41,864 0.00173 6 Gd Ka3
42,309 5.64 17 Gd Ka2
42,996 10.2 3 Gd Ka1
48,551 1.01 3 Gd Kb3
48,695 1.95 6 Gd Kb1
49,038 0.0307 14 Gd Kb5
49,959 0.653 19 Gd Kb2
50,099 0.253 11 Gd Kb4

Betas from 146mTb (23 s 2)

>Eb endpoint (keV) Ib (%) Decay mode
2419,5 0.4 b+
2529 5.0 b+
3441,5 0.6 e
3551 8 e
4149,18 14 b+
4251,4 12 b+
4590,08 31 b+
5171,18 4.5 e
5273,4 3.5 e
5612,08 8 e