228 Ac decay; t1/2 = 6.15 h (t = 8.87 h).

  1. 228Ac [b (+ g)] 228Th  (~ 100%)
  2. 228Ac [a (+ g)] 224Fr (5.5 10-6%; t1/2 ~ 13 ky)
g + c.e.(a) a b
E(b) I(c) (c) Ic.e. E(b) I(c) E(b) I(c)
1936.0 2.1 10-5 2.1 10-8     19.0 4.0 10-5
1795.0 2.1 10-5 2.1 10-8     "  
1979.0 1.9 10-5 1.9 10-8     105.0 6.0 10-5
1850.0 4.5 10-5 4.5 10-8     "  
2029.0 1.9 10-5 1.9 10-8     112.0 1.9 10-4
1972.0 3.7 10-5 3.7 10-8     "  
1014.0 4.8 10-5 1.4 10-7     "  
940.0 9.0 10-5 2.7 10-7     "  
1965.0 2.1 10-4 2.1 10-7     119.0 5.4 10-4
1191.0 6.4 10-5 1.3 10-7     "  
1148.0 6.1 10-5 1.2 10-7     "  
1053.0 1.4 10-4 2.8 10-7     "  
385.0 6.9 10-5 1.4 10-6     "  
1956.0 8.0 10-6 8.0 10-9     128.0 3.0 10-5
1827.0 2.1 10-5 2.1 10-8     "  
1952.0 6.1 10-4 6.1 10-7     132.0 0.0030
1823.0 4.5 10-4 4.5 10-7     "  
1041.0 4.6 10-4 1.4 10-6     "  
987.0 5.1 10-4 1.5 10-6     "  
919.0 2.8 10-4 8.4 10-7     "  
887.0 2.8 10-4 8.4 10-7     "  
373.0 6.9 10-5 1.4 10-6     "  
215.0 3.0 10-4 1.8 10-5     "  
1930.0 2.1 10-4 2.1 10-7     155.0 3.9 10-4
1801.0 4.5 10-5 4.5 10-8     "  
1609.0 8.0 10-5 8.0 10-8     "  
1018.0 5.9 10-5 1.8 10-7     "  
1887.0 9.3 10-4 9.3 10-7     197.0 0.0024
1758.0 3.6 10-4 3.6 10-7     "  
1001.0 5.3 10-5 1.6 10-7     "  
976.0 5.1 10-4 1.1 10-5     "  
922.0 1.5 10-4 4.6 10-7     "  
853.0 1.2 10-4 4.9 10-7     "  
777.0 1.9 10-4 7.6 10-7     "  
718.0 1.9 10-4 9.5 10-7     "  
1880.0 1.3 10-5 1.3 10-8     205.0 4.8 10-4
1751.0 8.2 10-5 8.2 10-8     "  
1063.0 1.1 10-4 3.3 10-7     "  
398.0 2.8 10-4 5.6 10-6     "  
1871.0 2.5 10-4 2.5 10-7     213.0 4.4 10-4
1742.0 8.2 10-5 8.2 10-8     "  
389.0 1.1 10-4 2.1 10-6     "  
1907.0 1.2 10-4 1.2 10-7     235.0 3.4 10-4
1075.0 1.0 10-4 3.0 10-7     "  
490.0 1.1 10-4 1.1 10-6     "  
1900.0 2.9 10-5 2.9 10-8     242.0 6.6 10-4
1842.0 4.3 10-4 4.3 10-7     "  
1714.0 5.6 10-5 5.6 10-8     "  
877.0 1.4 10-4 4.2 10-7     "  
1835.0 3.9 10-4 3.9 10-7     249.0 9.5 10-4
1706.0 8.8 10-5 8.8 10-8     "  
870.0 4.5 10-4 2.3 10-5     "  
1798.0 2.1 10-5 2.1 10-8     344.0 4.7 10-4
1740.0 1.1 10-4 1.1 10-7     "  
1470.0 2.1 10-4 4.2 10-7     "  
1401.0 1.3 10-4 2.6 10-7     "  
1738.0 1.8 10-4 1.8 10-7     346.0 1.0 10-4
1609.0 8.0 10-5 8.0 10-8     "  
1277.0 1.4 10-5 2.8 10-8     "  
1702.0 4.9 10-4 4.9 10-7     382.0 0.0016
1573.0 3.4 10-4 3.4 10-7     "  
791.0 2.4 10-4 9.6 10-7     "  
738.0 3.8 10-4 3.0 10-5     "  
416.0 1.4 10-4 2.7 10-6     "  
1701.0 1.0 10-4 1.0 10-7     384.0 5.0 10-4
1572.0 5.9 10-5 5.9 10-8     "  
326.0 3.4 10-4 1.0 10-5     "  
1686.0 9.8 10-4 9.8 10-7     398.0 0.0034
1557.0 0.0018 1.8 10-6     "  
1366.0 1.4 10-4 2.8 10-7     "  
1348.0 1.6 10-4 3.2 10-7     "  
400.0 3.0 10-4 6.0 10-6     "  
1678.0 5.6 10-4 5.6 10-7     407.0 0.0012
1549.0 3.9 10-4 3.9 10-7     "  
1358.0 2.1 10-4 4.2 10-7     "  
1217.0 2.2 10-4 4.4 10-7     "  
1724.0 3.0 10-4 3.0 10-7     418.0 0.016
1667.0 0.0018 1.8 10-6     "  
1538.0 4.8 10-4 4.8 10-7     "  
755.0 0.010 7.6 10-4     "  
702.0 0.0018 1.6 10-4     "  
549.0 2.4 10-4 2.4 10-5     "  
497.0 6.1 10-5 3.7 10-5     "  
1631.0 0.016 1.6 10-5     454.0 0.026
1502.0 0.0047 4.7 10-6     "  
814.0 7.2 10-5 2.9 10-7     "  
672.0 2.7 10-4 1.6 10-6     "  
42.5 9.3 10-5 0.0046     "  
1288.0 8.2 10-4 1.6 10-6     458.0 0.0016
1164.0 6.7 10-4 1.3 10-6     "  
457.0 1.5 10-4 1.5 10-6     "  
1625.0 0.0026 2.6 10-6     459.0 0.012
1496.0 0.0089 8.9 10-6     "  
660.0 2.4 10-4 1.4 10-6     "  
1588.0 0.033 3.3 10-5     496.0 0.042
1459.0 0.0080 1.6 10-5     "  
1250.0 6.4 10-4 1.3 10-6     "  
677.0 6.4 10-4 1.4 10-5     "  
666.0 6.4 10-4 3.8 10-5     "  
629.0 4.6 10-4 3.2 10-5     "  
623.0 1.1 10-4 7.7 10-7     "  
555.0 4.7 10-4 4.7 10-5     "  
523.0 0.0011 1.2 10-5     "  
492.0 2.4 10-4 3.4 10-5     "  
419.0 2.1 10-4 4.2 10-6     "  
115.0 1.0 10-4 1.0 10-3     "  
1315.0 1.5 10-4 3.0 10-7     499.0 0.0078
1247.0 0.0050 1.0 10-5     "  
699.0 3.8 10-4 2.3 10-6     "  
675.0 0.0010 6.2 10-6     "  
627.0 1.4 10-4 9.8 10-7     "  
520.0 6.9 10-4 1.4 10-4     "  
475.0 2.3 10-4 3.5 10-5     "  
1638.0 0.0047 4.7 10-6     504.0 0.012
1581.0 0.0061 6.1 10-6     "  
1451.0 1.1 10-4 2.2 10-7     "  
1309.0 1.3 10-4 2.6 10-7     "  
515.0 5.0 10-4 5.0 10-6     "  
470.0 1.3 10-4 1.3 10-6     "  
1560.0 2.1 10-4 2.1 10-7     524.0 6.0 10-4
1431.0 3.6 10-4 7.2 10-7     "  
1143.0 1.1 10-4 2.1 10-7     603.0 0.0018
571.0 0.0017 2.6 10-4     "  
416.0 1.4 10-4 3.1 10-5     "  
1345.0 9.3 10-5 1.9 10-7     611.0 0.081
1135.0 1.0 10-4 2.0 10-7     "  
562.0 0.0087 5.6 10-4     "  
509.0 0.0047 5.6 10-4     "  
440.0 0.0013 3.9 10-4     "  
378.0 2.5 10-4 7.0 10-5     "  
99.5 0.013 0.053     "  
1054.0 1.9 10-4 5.7 10-7     692.0 0.0044
931.0 1.3 10-4 3.8 10-7     "  
481.0 2.4 10-4 2.4 10-6     "  
328.0 0.0011 1.5 10-4     "  
282.0 6.4 10-4 4.7 10-4     "  
224.0 5.6 10-4 9.2 10-4     "  
1374.0 1.4 10-4 2.8 10-7     710.0 0.0090
1245.0 9.8 10-4 2.0 10-6     "  
1103.0 1.5 10-4 3.1 10-7     "  
463.0 0.044 0.0023     "  
452.0 1.6 10-4 2.6 10-5     "  
409.0 0.019 0.0016     "  
341.0 0.0038 4.5 10-4     "  
264.0 4.1 10-4 2.1 10-5     "  
1416.0 2.2 10-4 2.2 10-7     726.0 8.0 10-4
1229.0 7.7 10-5 1.5 10-7     "  
1088.0 6.1 10-5 1.8 10-7     "  
1020.0 2.2 10-4 6.6 10-7     "  
472.0 3.4 10-4 5.0 10-5     "  
1286.0 5.1 10-4 1.0 10-6     798.0 0.0021
1157.0 7.2 10-5 1.4 10-7     "  
1016.0 1.9 10-4 5.7 10-7     "  
948.0 0.0011 3.3 10-6     "  
825.0 5.2 10-4 7.8 10-6     "  
169.0 1.3 10-4 2.0 10-5     "  
1040.0 4.6 10-4 1.4 10-6     915.0 0.0080
830.0 0.0055 9.1 10-5     "  
707.0 0.0016 6.9 10-5     "  
204.0 0.0012 1.1 10-4     "  
136.0 1.8 10-4 8.9 10-4     "  
1175.0 2.5 10-4 5.0 10-7     967.0 0.0023
1118.0 5.6 10-4 1.1 10-6     "  
988.0 0.0013 4.0 10-6     "  
231.0 2.6 10-4 2.9 10-4     "  
1111.0 0.0031 6.3 10-6     974.0 0.035
840.0 0.0094 1.3 10-4     "  
772.0 0.015 4.1 10-4     "  
649.0 4.1 10-4 1.0 10-5     "  
199.0 0.0033 3.1 10-4     "  
146.0 0.0016 0.0032     "  
77.3 2.6 10-4 6.1 10-5     "  
1154.0 0.0014 2.9 10-6     989.0 0.056
1096.0 0.0013 4.0 10-6     "  
322.0 0.0023 3.3 10-4     "  
279.0 0.0020 0.0013     "  
185.0 7.2 10-4 0.046     "  
174.0 3.6 10-4 9.0 10-4     "  
1065.0 0.0014 4.1 10-6     1019 0.058
795.0 0.043 8.7 10-4     "  
727.0 0.0064 1.2 10-4     "  
154.0 0.0074 0.0013     "  
100.0 9.6 10-4 6.0 10-4     "  
1033.0 0.0021 6.2 10-6     1051 0.0017
904.0 0.0078 9.6 10-5     "  
873.0 3.2 10-4 9.6 10-7     1082 9.0 10-4
664.0 2.9 10-4 1.7 10-6     "  
541.0 2.7 10-4 2.4 10-6     "  
965.0 0.051 5.6 10-4     1119 0.030
836.0 0.017 2.4 10-4     "  
1016.0 1.9 10-4 5.7 10-7     1126 0.0030
959.0 0.0029 1.3 10-4     "  
620.0 8.2 10-4 6.9 10-6     "  
979.0 2.7 10-4 8.1 10-7     1162 8.0 10-4
922.0 1.5 10-4 4.6 10-7     "  
651.0 9.3 10-4 5.6 10-6     "  
583.0 0.0011 9.1 10-6     "  
969.0 0.162 0.0017     1173 0.310
911.0 0.266 0.0032     "  
782.0 0.0050 1.5 10-4     "  
640.0 5.6 10-4 6.7 10-5     1174 (fed)(d)
572.0 0.0015 1.4 10-4     "  
449.0 4.9 10-4 2.8 10-5     "  
944.0 9.8 10-4 2.9 10-6     1198 4.6 10-4
616.0 8.2 10-4 5.7 10-6     "  
874.0 4.9 10-4 1.5 10-6     1268 0.0022
817.0 3.1 10-4 1.2 10-6     "  
688.0 6.9 10-4 4.1 10-6     "  
546.0 0.0021 1.9 10-5     "  
478.0 0.0022 2.2 10-5     "  
774.0 8.0 10-4 4.0 10-6     1310 (fed)(d)
504.0 0.0019 2.3 10-5     "  
332.0 0.0037 1.1 10-4     1623 (fed)(d)
141.0 5.2 10-4 1.1 10-4     "  
338.0 0.113 0.0033     1746 0.116
209.0 0.039 0.0033     "  
191.0 0.0013 0.0010     1764 (fed)(d)
328.0 0.030 9.1 10-4     1814 0.0054
270.0 0.034 0.0016     "  
129.0 0.025 0.093     1955 0.019
57.8 0.0049 0.760     2084 0.100
? ? ? 4270 5.5 10-8    

Notes:                                                                     

  1. c.e.: conversion electrons
  2. Energies in keV
  3. Intensities per `parent' decay of Th
  4. Data from compilations and amendments in Nuclear Data Sheets to Vol. 64 (1991)
    Levels marked `(fed)' receive no direct b-decay, but are fed by gs from higher levels
  5. 228Ac and 224Fr entries in KAERI nuclide chart