149 Tb
65 84
Half life: 4.118 h 25
Jp: 1/2+
Decay mode: e+b+, a
Sn (keV): 9056 31
Sp (keV): 2509 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+b+ 83.3 17 3638 5
a 16.7 17 4077.2 24

Gammas from 149Tb (4.118 h 25)

Eg (keV) Ig (%) Decay mode
98.1 2 0.150 18 e+b+
117.2 0.018 9 e+b+
164.98 2 26.4 3 e+b+
187.22 2 4.30 5 e+b+
219.7 0.011 5 e+b+
252.3 1 0.088 18 e+b+
289.3 3 0.071 18 e+b+
307.79 7 0.265 18 e+b+
317.4 0.062 18 e+b+
321.9 0.018 9 e+b+
347.7 0.132 18 e+b+
352.24 2 29.43 9 e+b+
378.5 1 0.124 18 e+b+
388.57 2 18.37 13 e+b+
390.3 0.11 3 e+b+
413.3 1 0.124 9 e+b+
432.5 2 0.071 18 e+b+
446.7 6 0.026 18 e+b+
448.5 0.044 9 e+b+
449.6 0.062 18 e+b+
464.85 2 5.65 8 e+b+
469.9 0.009 5 e+b+
472.4 1 0.23 4 e+b+
488.1 2 0.088 18 e+b+
544.3 0.026 9 e+b+
570.5 0.016 e+b+
587.2 0.053 18 e+b+
606.7 0.018 9 e+b+
614.2 1 0.168 18 e+b+
620.7 0.071 18 e+b+
625.7 3 0.018 18 e+b+
628.4 2 0.079 18 e+b+
648.0 1 0.61 5 e+b+
652.12 2 16.25 22 e+b+
670.4 0.062 18 e+b+
670.8 0.079 18 e+b+
674.61 6 0.680 18 e+b+
677.2 1 0.177 18 e+b+
685.6 0.019 7 e+b+
686.66 8 0.194 18 e+b+
723.7 0.071 18 e+b+
723.8 0.106 18 e+b+
740.2 1 0.397 18 e+b+
746.0 1 0.300 18 e+b+
772.65 3 1.61 4 e+b+
774.0 0.016 8 e+b+
780.2 0.021 5 e+b+
786.8 1 0.132 9 e+b+
791.8 0.06 3 e+b+
795.9 1 0.10 3 e+b+
796.9 0.018 9 e+b+
797.0 0.018 9 e+b+
817.1 2 11.59 18 e+b+
817.5 0.062 18 e+b+
825.4 0.062 18 e+b+
838.1 2 0.071 9 e+b+
853.43 1 15.45 22 e+b+
858.6 0.071 18 e+b+
861.86 2 7.50 11 e+b+
867.6 0.040 8 e+b+
920.5 0.026 9 e+b+
944.4 2 0.044 18 e+b+
952.7 1 0.159 18 e+b+
955.71 5 0.47 3 e+b+
963.6 0.035 18 e+b+
965.63 5 0.53 3 e+b+
979.09 6 0.49 3 e+b+
994.3 0.035 9 e+b+
996.5 1 0.124 9 e+b+
1001.7 <0.026 e+b+
1002.1 0.283 18 e+b+
1027.2 2 0.018 9 e+b+
1032.8 0.09 3 e+b+
1033.4 0.25 4 e+b+
1040.65 4 1.46 4 e+b+
1045.9 0.035 18 e+b+
1055.1 0.026 9 e+b+
1055.8 0.12 4 e+b+
1061.6 1 0.062 9 e+b+
1069.6 0.026 9 e+b+
1075.0 1 0.071 9 e+b+
1085.5 0.05 3 e+b+
1094.3 3 0.026 9 e+b+
1102.5 0.026 9 e+b+
1111.7 0.014 7 e+b+
1117.5 0.106 18 e+b+
1131.65 7 0.79 3 e+b+
1135.3 1 1.18 4 e+b+
1136.6 0.026 18 e+b+
1139.5 0.035 9 e+b+
1144.09 9 0.29 3 e+b+
1167.10 7 0.49 3 e+b+
1175.4 3.27 13 e+b+
1175.8 0.19 4 e+b+
1183.7 2 0.071 18 e+b+
1187.1 0.04 3 e+b+
1191.89 8 0.37 3 e+b+
1205.20 8 0.38 4 e+b+
1205.6 <0.018 e+b+
1234.7 2 0.066 11 e+b+
1245.1 0.026 9 e+b+
1261.7 2 0.115 18 e+b+
1269.7 0.014 8 e+b+
1273.9 0.014 7 e+b+
1277.0 0.035 18 e+b+
1280.8 1 0.088 9 e+b+
1302.92 8 0.80 3 e+b+
1320.9 0.011 5 e+b+
1322.7 1 0.088 9 e+b+
1337.5 0.019 7 e+b+
1338.6 0.044 18 e+b+
1341.19 6 2.30 9 e+b+
1344.5 0.018 9 e+b+
1357.8 0.011 7 e+b+
1363.8 0.025 6 e+b+
1366.0 0.018 9 e+b+
1368.9 0.044 9 e+b+
1379.1 1 0.371 18 e+b+
1384.4 0.018 9 e+b+
1392.3 3 0.053 18 e+b+
1398.3 3 0.053 18 e+b+
1402.4 0.008 4 e+b+
1402.4 0.009 4 e+b+
1402.91 9 0.43 3 e+b+
1420.6 1 0.088 9 e+b+
1422.1 0.044 18 e+b+
1425.6 3 0.062 18 e+b+
1444.4 0.079 18 e+b+
1449.10 8 0.94 4 e+b+
1465.1 0.011 6 e+b+
1474.3 0.018 9 e+b+
1477.7 2 0.071 18 e+b+
1483.6 1 0.24 3 e+b+
1488.3 0.062 18 e+b+
1490.3 2 0.18 3 e+b+
1492.2 3 0.106 18 e+b+
1497.0 0.035 9 e+b+
1497.6 0.016 6 e+b+
1512.1 2 0.079 18 e+b+
1515.3 0.035 18 e+b+
1536.2 0.026 9 e+b+
1539.6 4 0.053 18 e+b+
1543.4 3 0.071 18 e+b+
1544.1 2 0.079 18 e+b+
1558.5 1 0.097 18 e+b+
1563.2 0.012 7 e+b+
1572.4 0.013 7 e+b+
1574.8 0.053 18 e+b+
1585.6 1 0.168 9 e+b+
1586.4 0.035 9 e+b+
1592.4 0.044 18 e+b+
1623.8 0.018 8 e+b+
1632.3 0.026 9 e+b+
1640.26 6 3.18 9 e+b+
1641.3 0.014 7 e+b+
1651.0 0.007 4 e+b+
1656.2 0.018 9 e+b+
1656.8 0.185 18 e+b+
1657.3 0.021 8 e+b+
1662.3 0.018 9 e+b+
1679.3 1 0.159 18 e+b+
1694.7 0.026 18 e+b+
1699.5 0.026 9 e+b+
1707.5 3 0.026 9 e+b+
1718.9 0.009 5 e+b+
1730.4 0.022 e+b+
1736.3 2 0.057 8 e+b+
1751.0 4 0.035 18 e+b+
1755.6 0.0203 18 e+b+
1755.8 0.020 8 e+b+
1769.4 0.018 9 e+b+
1772.7 0.018 9 e+b+
1772.8 0.018 18 e+b+
1772.9 0.053 18 e+b+
1774.4 0.053 18 e+b+
1782.2 1 0.221 18 e+b+
1788.1 0.026 9 e+b+
1794.1 0.015 7 e+b+
1797.8 0.018 9 e+b+
1798.2 0.141 18 e+b+
1798.5 0.026 18 e+b+
1803.5 0.015 8 e+b+
1806.0 1 0.44 3 e+b+
1810.6 2 0.062 9 e+b+
1826.0 0.079 18 e+b+
1826.9 0.009 4 e+b+
1827.5 1.09 5 e+b+
1835.0 0.022 7 e+b+
1847.7 0.079 9 e+b+
1852.8 0.018 9 e+b+
1855.6 0.026 18 e+b+
1859.3 0.026 9 e+b+
1874.6 1 0.265 18 e+b+
1877.1 0.026 18 e+b+
1877.7 0.018 9 e+b+
1878.5 0.071 18 e+b+
1895.9 0.006 4 e+b+
1896.3 0.023 8 e+b+
1909.3 1 0.221 18 e+b+
1912.7 3 0.062 18 e+b+
1915.8 0.026 9 e+b+
1916.1 0.035 18 e+b+
1918.4 0.011 5 e+b+
1923.4 0.010 5 e+b+
1931.0 0.011 5 e+b+
1940.1 1 0.31 3 e+b+
1943.7 0.005 4 e+b+
1948.5 1 0.406 18 e+b+
1950.9 0.014 7 e+b+
1970.0 0.035 9 e+b+
1972.9 2 0.159 18 e+b+
1976.6 0.026 18 e+b+
1991.8 0.035 18 e+b+
1992.5 0.018 18 e+b+
1993.3 0.053 18 e+b+
1994.4 0.026 9 e+b+
2000.8 0.018 9 e+b+
2007.9 1 0.78 3 e+b+
2008.5 0.026 18 e+b+
2024.4 0.014 8 e+b+
2034.3 0.04 3 e+b+
2034.8 0.17 3 e+b+
2044.7 0.015 7 e+b+
2050.7 4 0.044 18 e+b+
2062.3 0.010 6 e+b+
2073.0 0.026 9 e+b+
2076.4 0.035 9 e+b+
2096.5 0.035 9 e+b+
2097.1 0.035 9 e+b+
2105.6 3 0.088 18 e+b+
2108.2 3 0.079 18 e+b+
2130.5 2 0.124 18 e+b+
2135.0 0.012 6 e+b+
2135.7 2 0.106 18 e+b+
2148.8 0.035 9 e+b+
2149.1 0.026 9 e+b+
2151.5 0.018 9 e+b+
2160.6 0.020 8 e+b+
2179.6 0.044 9 e+b+
2182.6 1 0.42 3 e+b+
2186.3 0.026 18 e+b+
2188.6 0.026 9 e+b+
2196.5 0.019 6 e+b+
2204.1 0.026 9 e+b+
2212.9 0.019 6 e+b+
2221.1 0.009 5 e+b+
2231.5 0.021 5 e+b+
2237.8 1 0.150 18 e+b+
2246.1 0.012 6 e+b+
2247.0 2 0.150 18 e+b+
2253.7 0.026 7 e+b+
2261.0 0.141 18 e+b+
2261.5 0.03 3 e+b+
2282.6 1 0.38 3 e+b+
2317.9 0.017 6 e+b+
2319.0 0.010 4 e+b+
2338.7 2 0.079 18 e+b+
2358.5 0.007 4 e+b+
2384.3 0.014 5 e+b+
2389.3 3 0.044 9 e+b+
2404.9 2 0.097 18 e+b+
2414.0 0.007 4 e+b+
2415.8 4 0.026 9 e+b+
2434.5 4 0.044 9 e+b+
2440.0 0.006 4 e+b+
2441.3 0.013 6 e+b+
2446.4 0.006 4 e+b+
2448.2 0.115 18 e+b+
2455.8 0.026 9 e+b+
2456.2 0.044 9 e+b+
2472.7 2 0.097 18 e+b+
2478.3 0.024 7 e+b+
2496.4 2 0.097 18 e+b+
2508.3 0.006 4 e+b+
2523.5 0.017 6 e+b+
2538.3 4 0.044 18 e+b+
2548.1 0.026 9 e+b+
2560.8 1 0.291 18 e+b+
2586.3 0.026 9 e+b+
2625.7 0.009 4 e+b+
2647.6 0.203 9 e+b+
2649.7 0.009 4 e+b+
2656.1 0.010 5 e+b+
2669.1 0.132 18 e+b+
2696.8 0.044 18 e+b+
2718.0 0.006 4 e+b+
2753.2 0.021 7 e+b+
2771.8 1 0.132 18 e+b+
2796.5 0.026 9 e+b+
2797.1 0.044 9 e+b+
2812.7 0.035 9 e+b+
2823.3 2 0.079 18 e+b+
2834.7 0.026 9 e+b+
2838.4 0.026 18 e+b+
2849.2 0.016 6 e+b+
2854.2 0.026 9 e+b+
2856.0 2 0.079 18 e+b+
2878.9 3 0.062 18 e+b+
2892.0 4 0.031 10 e+b+
2905.8 0.017 6 e+b+
2906.1 0.012 6 e+b+
2920.7 0.009 5 e+b+
2935.1 3 0.097 18 e+b+
2942.6 0.027 7 e+b+
2959.0 <0.026 e+b+
2961.3 0.82 4 e+b+
2961.4 <0.026 e+b+
2966.8 0.019 6 e+b+
3010.6 3 0.088 18 e+b+
3032.4 0.033 7 e+b+
3036.4 5 0.026 9 e+b+
3041.4 0.018 9 e+b+
3051.2 0.016 6 e+b+
3066.1 0.008 4 e+b+
3066.3 0.014 6 e+b+
3078.9 0.026 9 e+b+
3090.6 0.007 4 e+b+
3133.9 5 0.017 4 e+b+
3147.0 0.008 4 e+b+
3148.5 0.014 5 e+b+
3154.0 5 0.024 6 e+b+
3163.9 4 0.022 e+b+
3182.8 4 0.035 9 e+b+
3200.2 2 0.221 18 e+b+
3201.2 <0.018 e+b+
3238.4 0.013 4 e+b+
3254.5 0.013 6 e+b+
3266.4 4 0.014 4 e+b+
3301.8 0.011 5 e+b+
3308.2 3 0.079 18 e+b+
3335.0 0.009 3 e+b+
3370.1 0.007 4 e+b+
3378.9 4 0.015 5 e+b+

X-rays from 149Tb (4.118 h 25)

E (keV) I (%) Assignment
5,362 0.223 22 Gd Ll
6,026 0.59 4 Gd La2
6,050 0.080 6 Gd Lh
6,058 5.3 3 Gd La1
6,687 0.31 5 Gd Lb4
6,713 3.4 3 Gd Lb1
6,832 0.51 8 Gd Lb3
6,867 0.053 3 Gd Lb6
7,102 1.11 7 Gd Lb2
7,243 0.0091 6 Gd Lb5
7,790 0.58 5 Gd Lg1
7,930 0.0048 5 Gd Lg6
8,087 0.098 16 Gd Lg2
8,105 0.138 22 Gd Lg3
41,864 0.00626 22 Gd Ka3
42,309 20.4 6 Gd Ka2
42,996 36.8 10 Gd Ka1
48,551 3.65 10 Gd Kb3
48,695 7.07 20 Gd Kb1
49,038 0.111 5 Gd Kb5
49,959 2.36 7 Gd Kb2
50,099 0.92 4 Gd Kb4

Betas from 149Tb (4.118 h 25)

>Eb endpoint (keV) Ib (%) Decay mode
94,1 0.015 6 e
102,9 0.055 11 e
121,8 0.022 7 e
138,4 0.017 5 e
151,8 0.026 7 e
164,8 0.095 20 e
171,2 0.026 8 e
195,2 0.033 9 e
206,6 0.041 10 e
219,2 0.057 13 e
234,6 0.109 18 e
253,3 0.033 8 e
272,8 0.274 25 e
297,4 0.048 11 e
319 0.079 20 e
324,38 1.16 7 e
343,8 0.027 8 e
365,1 0.048 13 e
379,6 0.047 11 e
406,8 0.077 20 e
416,1 0.00081 9 b+
431,57 0.25 3 e
436,6 0.20 4 e
457,64 0.0087 5 b+
462,41 0.34 4 e
488,6 0.064 13 e
489,4 0.00039 8 b+
513,93 0.20 2 e
527,53 0.00081 11 b+
538,24 0.50 4 e
558,2 0.062 18 e
567,2 0.042 10 e
581 0.031 10 e
616,95 0.33 4 e
623,51 0.058 3 b+
634,6 0.17 4 e
638,36 1.23 7 e
660,3 0.20 3 e
676,5 0.074 13 e
715,3 0.115 19 e
719,8 0.057 19 e
724,92 0.45 4 e
771,69 0.0079 6 b+
776,2 0.13 3 e
807,4 0.024 7 e
813,03 1.17 7 e
829,4 0.105 22 e
843,17 0.0300 21 b+
865,39 0.012 1 b+
870 0.044 12 e
880,79 0.47 4 e
935,1 0.087 21 e
954,58 0.47 4 e
960,81 0.0440 22 b+
1001,95 0.027 3 b+
1018,71 0.011 2 b+
1024,8 0.42 4 e
1038,69 0.49 4 e
1047,94 0.35 5 e
1058,62 0.052 3 b+
1067,9 0.104 20 e
1071,87 0.014 3 b+
1128,4 0.049 4 b+
1134,3 0.097 20 e
1155,25 0.21 4 e
1267,27 0.016 2 b+
1323,9 0.062 13 e
1337,28 1.14 7 e
1376,46 0.65 5 e
1410,33 3.80 13 b+
1438,1 0.58 6 e
1471,91 0.032 10 b+
1479,64 4.25 16 e
1491,11 0.030 b+
1511,4 0.12 3 e
1530,8 0.01 1 b+
1549,53 0.23 3 e
1589,16 0.74 3 b+
1645,51 8.4 4 e
1793,69 0.51 4 e
1798,9 1.0 1 b+
1865,17 1.43 9 e
1887,39 0.47 5 e
1982,81 1.29 7 e
2023,95 0.69 7 e
2040,71 0.26 4 e
2080,62 1.09 6 e
2093,87 0.29 6 e
2150,4 0.82 7 e
2263,76 0.75 14 b+
2289,27 0.18 2 e
2432,33 31.5 9 e
2451,01 0.39 14 b+
2493,91 0.22 7 e
2513,11 0.15 e
2552,8 0.08 3 e
2611,16 4.00 22 e
2820,9 3.7 3 e
3285,76 1.3 3 e
3473,01 1.5 6 e

Alphas from 149Tb (4.118 h 25)

Ea (keV) Ia (%)
3644 3 0.03 1
3967 3 100