148 Eu
63 85
Half life: 54.5 d 5
Jp: 5-
Decay mode: e+b+, a
Sn (keV): 6756 17
Sp (keV): 4252 17
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 3107 17
a 9.4E-7 2 8 2762 17

Gammas from 148Eu (54.5 d 5)

Eg (keV) Ig (%) Decay mode
66.72 9 0.026 3 e+b+
92.6 5 0.019 10 e+b+
98.530 20 0.101 3 e+b+
116.01 4 0.150 4 e+b+
151.6 3 0.0115 14 e+b+
157.8 5 0.010 5 e+b+
161.00 6 0.0288 14 e+b+
166.15 3 0.0676 22 e+b+
182.83 3 0.15 3 e+b+
189.721 16 0.178 4 e+b+
216.16 6 0.020 3 e+b+
216.16 6 0.029 3 e+b+
218.3 3 0.0079 14 e+b+
222.71 12 0.0230 22 e+b+
241.653 1 1.44 3 e+b+
243.83 4 0.324 10 e+b+
252.60 3 0.134 4 e+b+
255.35 13 0.0223 14 e+b+
279.30 5 0.084 4 e+b+
288.141 13 0.347 8 e+b+
291.3 3 0.0108 14 e+b+
296.21 7 0.055 3 e+b+
300.65 7 0.055 4 e+b+
308.45 10 0.075 7 e+b+
310.14 3 0.10 3 e+b+
310.14 10 0.148 3 e+b+
311.570 20 1.79 4 e+b+
319.270 20 0.155 4 e+b+
322.1 5 0.019 10 e+b+
332.91 13 0.0101 22 e+b+
356.47 15 0.012 3 e+b+
362.5 3 0.026 4 e+b+
377.560 20 0.16 4 e+b+
385.9 6 0.014 7 e+b+
414.028 12 10.3 3 e+b+
414.057 16 10.1 5 e+b+
423.5 4 0.038 9 e+b+
432.745 8 0.12 6 e+b+
432.745 8 2.83 9 e+b+
437.18 4 0.191 6 e+b+
441.23 14 0.0115 22 e+b+
446.52 6 0.040 3 e+b+
449 1 0.050 22 e+b+
455.30 15 0.027 3 e+b+
460.57 3 0.0187 22 e+b+
460.80 20 0.0187 22 e+b+
468.500 12 0.421 9 e+b+
474.2 4 0.005 3 e+b+
478.4 4 0.022 3 e+b+
480.89 8 0.094 4 e+b+
485.90 14 0.016 3 e+b+
486.5 0.016 3 e+b+
489.2 5 0.019 10 e+b+
493.51 10 0.047 6 e+b+
495.25 6 0.256 8 e+b+
495.28 10 0.047 20 e+b+
501.312 11 0.971 22 e+b+
504.57 7 0.138 5 e+b+
516.793 14 0.423 14 e+b+
532 1 0.019 10 e+b+
534.38 7 0.101 22 e+b+
539.1 5 0.010 5 e+b+
550.284 12 98.5 22 e+b+
553.231 14 12.9 22 e+b+
553.260 15 5.0 22 e+b+
571.962 7 9.56 22 e+b+
574 1 0.019 10 e+b+
575.97 10 0.046 5 e+b+
583.4 5 0.019 8 e+b+
587.52 6 0.117 4 e+b+
594.89 4 0.193 7 e+b+
599.81 3 0.344 7 e+b+
602.62 3 0.029 9 e+b+
602.62 3 0.30 e+b+
611.293 8 20.5 4 e+b+
620.04 20 0.20 4 e+b+
620.04 3 0.90 6 e+b+
629.987 8 71.9 16 e+b+
636.86 7 0.029 5 e+b+
643.90 20 0.0157 14 e+b+
646.9 5 0.010 5 e+b+
651.5 5 0.019 10 e+b+
654.220 5 1.62 4 e+b+
656.93 3 0.141 9 e+b+
662.79 5 0.100 4 e+b+
667.170 20 0.0669 14 e+b+
667.170 20 0.1057 14 e+b+
683.153 7 1.28 3 e+b+
690.74 3 0.122 3 e+b+
701.9 5 0.019 10 e+b+
704.4 3 0.019 5 e+b+
705.91 18 0.017 4 e+b+
714.769 13 1.72 4 e+b+
719.64 5 0.273 14 e+b+
725.673 9 12.7 3 e+b+
732.99 7 0.056 5 e+b+
735.00 5 0.032 17 e+b+
735.00 5 0.12 4 e+b+
736.90 20 0.021 5 e+b+
742.16 11 0.0244 22 e+b+
745.87 5 0.053 4 e+b+
756.581 12 0.304 7 e+b+
770.307 10 0.423 9 e+b+
774.2 5 0.010 4 e+b+
780.11 6 0.115 4 e+b+
787.98 18 0.027 4 e+b+
790.20 20 0.041 4 e+b+
792.59 6 0.118 5 e+b+
799.23 3 0.418 12 e+b+
810.12 4 0.0683 22 e+b+
817.5 5 0.010 5 e+b+
826.30 16 0.026 3 e+b+
828.61 12 0.035 3 e+b+
832.82 14 0.0244 14 e+b+
832.9 5 0.010 5 e+b+
851.4 5 0.015 7 e+b+
856.9 2 0.032 4 e+b+
859.90 20 0.035 4 e+b+
869.891 8 5.49 12 e+b+
895.847 10 0.647 14 e+b+
903.831 15 0.370 8 e+b+
906.87 3 0.208 5 e+b+
915.331 8 2.60 6 e+b+
924.75 3 0.315 8 e+b+
929.85 3 1.22 22 e+b+
930.807 19 1.4 3 e+b+
935.20 14 0.053 5 e+b+
938.10 9 0.116 5 e+b+
949.590 20 0.240 6 e+b+
961.4 5 0.010 5 e+b+
967.306 17 2.70 6 e+b+
976.50 4 0.0812 22 e+b+
979.843 15 0.214 5 e+b+
989.606 10 0.464 10 e+b+
1013.808 11 0.532 12 e+b+
1033.986 14 7.77 14 e+b+
1036 1 0.0079 14 e+b+
1047.57 2 0.05 3 e+b+
1047.570 20 0.188 5 e+b+
1058.7 5 0.010 5 e+b+
1066.75 3 0.390 9 e+b+
1068.25 10 0.093 8 e+b+
1069.82 4 0.219 7 e+b+
1082.096 17 0.189 4 e+b+
1089.154 18 0.205 5 e+b+
1097.18 3 0.124 4 e+b+
1104.321 16 0.367 8 e+b+
1107.67 3 0.130 4 e+b+
1110.6 5 0.010 5 e+b+
1113.92 3 0.137 4 e+b+
1121.91 13 0.0209 22 e+b+
1127.69 4 0.084 3 e+b+
1133.12 8 0.0467 22 e+b+
1138.4 5 0.0014 4 e+b+
1139.6 5 0.019 5 e+b+
1146.805 14 1.96 4 e+b+
1151.3 4 0.019 10 e+b+
1165.54 5 0.081 3 e+b+
1183.208 16 1.66 4 e+b+
1194.185 17 0.128 3 e+b+
1201.3 5 0.010 5 e+b+
1207.473 14 0.630 14 e+b+
1219.01 9 0.050 4 e+b+
1221.37 4 0.137 5 e+b+
1229.6 5 0.010 5 e+b+
1236.374 16 0.408 9 e+b+
1266.76 5 0.145 4 e+b+
1269.3 4 0.014 3 e+b+
1309.778 16 0.475 11 e+b+
1328.504 15 1.32 3 e+b+
1343.87 3 1.69 14 e+b+
1344.740 23 1.89 16 e+b+
1353.550 20 0.626 14 e+b+
1362.640 19 0.596 14 e+b+
1370.97 17 0.0194 14 e+b+
1377.4 5 0.010 5 e+b+
1390.44 14 0.0098 12 e+b+
1409.16 2 0.141 4 e+b+
1419.6 5 0.050 19 e+b+
1422.21 18 0.0134 12 e+b+
1454.110 20 0.369 9 e+b+
1460.630 19 1.16 3 e+b+
1465.12 3 0.016 5 e+b+
1492.81 4 0.099 3 e+b+
1503.200 2 0.186 4 e+b+
1511.49 7 0.042 3 e+b+
1513.9 4 0.0086 22 e+b+
1521.85 3 0.153 4 e+b+
1533.10 20 0.032 3 e+b+
1535.84 10 0.091 4 e+b+
1540.27 1 0.080 8 e+b+
1543.289 27 0.741 22 e+b+
1547.14 10 0.088 14 e+b+
1560.786 17 0.841 22 e+b+
1565.29 11 0.0316 14 e+b+
1572.90 20 0.0114 10 e+b+
1621.510 20 4.64 11 e+b+
1635.31 3 0.159 4 e+b+
1650.436 24 3.71 12 e+b+
1654.02 15 0.117 14 e+b+
1664.20 4 0.0705 22 e+b+
1677.85 3 0.425 14 e+b+
1680.90 15 0.029 4 e+b+
1699.54 6 0.0153 6 e+b+
1703.2 10 e+b+
1748.58 10 0.0344 11 e+b+
1776.87 4 0.0654 22 e+b+
1788.91 18 0.0056 6 e+b+
1840.06 8 0.0170 11 e+b+
1843.5 5 0.019 10 e+b+
1917.50 16 0.0021 4 e+b+
1939.17 4 0.0690 22 e+b+
1973.81 4 0.0532 14 e+b+
2122.75 8 0.0137 6 e+b+
2163.39 20 0.0055 6 e+b+
2173.28 4 0.231 6 e+b+

X-rays from 148Eu (54.5 d 5)

E (keV) I (%) Assignment
4,993 0.226 23 Sm Ll
5,589 0.084 6 Sm Lh
5,610 0.60 4 Sm La2
5,636 5.4 4 Sm La1
6,196 0.34 5 Sm Lb4
6,206 3.4 3 Sm Lb1
6,317 0.57 9 Sm Lb3
6,371 0.051 3 Sm Lb6
6,587 1.15 8 Sm Lb2
7,183 0.56 5 Sm Lg1
7,471 0.105 17 Sm Lg2
7,489 0.149 24 Sm Lg3
39,097 0.00589 22 Sm Ka3
39,522 23.2 7 Sm Ka2
40,118 42.1 13 Sm Ka1
45,294 4.11 12 Sm Kb3
45,414 7.96 24 Sm Kb1
45,741 0.118 5 Sm Kb5
46,578 2.63 8 Sm Kb2
46,705 0.99 5 Sm Kb4

Betas from 148Eu (54.5 d 5)

>Eb endpoint (keV) Ib (%) Decay mode
178,16 0.0344 13 e
245,88 0.275 6 e
276,31 7.0 2 e
291,41 0.627 16 e
305,24 8.4 2 e
372,6 0.025 3 e
379,68 0.192 8 e
383,49 1.33 3 e
390,97 0.26 5 e
393,66 0.285 9 e
405,05 0.211 9 e
408,39 0.90 2 e
423,56 0.600 13 e
433,94 0.23 1 e
466,12 1.17 6 e
523,11 0.480 14 e
536,28 0.245 7 e
574,55 0.042 8 e
582,87 3.3 4 e
616,95 2.40 6 e
716,6 0.051 12 e
732,58 0.67 2 e
779,92 2.25 4 e
788,5 0.020 5 e
878,93 0.27 7 e
892,73 9.5 2 e
904,74 0.14 7 b+
912,93 1.42 5 e
959,45 18 2 e
995,94 3.1 2 e
1011,41 3.47 8 e
1075,56 4.3 1 e
1201,08 10.7 3 e
1211,99 3.1 3 e
1373,51 11.8 19 e
1926,74 5.0 24 e

Alphas from 148Eu (54.5 d 5)

Ea (keV) Ia (%)
2630 30 100