Table of Isotopes decay data

WWW Table of Radioactive Isotopes

246m	Am
95	Am	151

Half life:

25.0 m 2

E(level):

30 10 keV

Jp:

2(-)

S_n (keV):

4976 18

S_p (keV):

5398 23

ENSDF citation:

NDS 84, 901 (1998)

Literature cut-off date:

30-Jun-1998

Author(s):

A. Artna-Cohen

References since cut-off:

²⁴⁶Am decay from 1998-98 (NSR)


Decay properties:
Mode	Branching (%)	Q-value (keV)	References
b^-	100	2376 18	71Mu05 68Fi03
IT	<0.01

Most Recent ENSDF Data (12/2002)
Mode	Data set name	Display data
b^-	246AM B- DECAY (25.0 M)
	Tables:
	ENSDF data:
	Java applets:
IT	246AM IT DECAY (25.0 M)
	Tables:
	ENSDF data:
	Java applets:

TORI Data (1999) Gammas from ^246mAm (25.0 m 2)
Eg (keV)	Ig (%)	Decay mode

34.76		b^-
42.852 5	~0.049	b^-
46.87		b^-
81.63		b^-
99.2 2		b^-
99.2 2	0.165 12	b^-
150.81 14	0.0079 15	b^-
152.9 2	0.0044 15	b^-
171.02 11	0.049 20	b^-
227.4 2	0.015 5	b^-
228.71 7	0.037 7	b^-
237.23 4	0.143 7	b^-
238.64 3	0.146 7	b^-
244.03 3	0.679 25	b^-
244.9 2	0.006 4	b^-
251.50 10	0.0027 5	b^-
261.73 5	0.156 5	b^-
263.17 5	0.0333 22	b^-
267.3 5	0.0049 25	b^-
270.07 3	1.02 3	b^-
271.1 2	0.0049 25	b^-
277.0 2	0.0020 7	b^-
287.78 3	0.128 4	b^-
289.3 2	0.0047 12	b^-
293.37 15	0.0044 12	b^-
302.96 5	0.0069 7	b^-
306.0 3	0.0012 7	b^-
321.07 4	0.0185 12	b^-
325.61 8	0.0059 10	b^-
327.81 17	0.0030 10	b^-
329.87 14	0.0032 10	b^-
343.93 4	0.0257 10	b^-
347.26 4	0.0240 12	b^-
354.45 6	0.0064 10	b^-
360.39 4	0.0566 22	b^-
361.85 9	0.0121 15	b^-
370.81 13	0.0042 10	b^-
373.36 5	0.0207 12	b^-
377.2 2	0.0027 10	b^-
381.0 3	0.0015 5	b^-
383.73 6	0.0185 20	b^-
398.14 12	0.0082 12	b^-
401.68 3	0.264 7	b^-
407.99 6	0.0101 10	b^-
414.16 6	0.0104 12	b^-
421.08 5	0.0220 17	b^-
423.4 5	0.0040 17	b^-
434.92 13	0.009 3	b^-
443.25 18	0.0035 10	b^-
446.8 5	0.0012 10	b^-
451.2 2	0.0025 10	b^-
456.11 6	0.0138 17	b^-
461.2 2	0.0032 12	b^-
465.61 5	0.0254 20	b^-
469.71 8	0.0101 12	b^-
472.33 5	0.0363 17	b^-
476.89 5	0.0212 15	b^-
487.2 3	0.0091 20	b^-
488.82 4	0.091 4	b^-
493.46 4	0.107 4	b^-
505.61 13	0.0121 22	b^-
507.10 5	0.067 3	b^-
514.79 4	0.086 4	b^-
516.60 13	0.0099 25	b^-
522.53 5	0.0457 20	b^-
524.92 4	0.073 3	b^-
528.69 7	0.0148 15	b^-
542.92 5	0.040 5	b^-
554.4 2	0.0220 17	b^-
554.68 6	0.0146 15	b^-
566.12 5	0.0425 25	b^-
577.9 3	0.0084 22	b^-
580.9 3	0.0084 22	b^-
602.54 6	0.232 12	b^-
609.98 9	0.044 7	b^-
636.72 12		b^-
636.72 12	0.012 3	b^-
649.48 4	0.366 12	b^-
656.35 14	0.012 3	b^-
670.1 2	0.008 3	b^-
677.86 6	0.045 4	b^-
684.28 5	0.583 20	b^-
698.27 5	0.116 7	b^-
717.24 5	0.252 10	b^-
724.79 4	0.212 7	b^-
732.5 2	0.015 4	b^-
734.41 4	1.16 4	b^-
745.05 4	0.235 7	b^-
747.74 8	0.025 5	b^-
751.0 3	0.035 12	b^-
752.06 4	0.82 3	b^-
759.59 4	0.640 20	b^-
776.3 3	0.0040 12	b^-
779.76 8	0.067 10	b^-
781.28 6	0.168 12	b^-
791.5 2	0.064 12	b^-
798.80 4	25	b^-
810.2 3	0.006 3	b^-
820.7 3	0.0037 22	b^-
829.37 8	0.018 4	b^-
833.60 4	1.78 5	b^-
904.42 5	0.0571 22	b^-
925.0 3	0.009 3	b^-
939.15 5	0.077 5	b^-
960.2 3	0.0054 22	b^-
962.9 4	0.0005 5	b^-
982.73 15	0.017 5	b^-
986.03 4	0.95 3	b^-
1023.44 7	0.040 5	b^-
1036.00 4	12.6 4	b^-
1045.08 6	0.018 3	b^-
1045.66 6	0.018 3	b^-
1062.04 4	17.1 4	b^-
1078.86 4	27.7 10	b^-
1081.40 6	0.34 5	b^-
1085.15 6	1.52 5	b^-
1102.5 2	0.0035 10	b^-
1105.0 5	<0.0007	b^-
1113.6 2	0.0067 12	b^-
1122.64 6	0.099 5	b^-
1124.29 4	0.259 10	b^-
1131.88 7	0.0109 12	b^-
1148.62 6	0.0183 15	b^-
1158.47 6	0.0124 10	b^-
1167.74 5	0.0249 15	b^-
1174.72		b^-
1177.2 2	0.0037 10	b^-
1198.19 6	0.0306 15	b^-
1203.2 2	0.0049 17	b^-
1206.96 4	0.148 5	b^-
1210.35 9	0.0111 17	b^-
1237.2 2	0.0072 10	b^-
1249.79 4	0.148 5	b^-
1257.62 6	0.0388 25	b^-
1274.72 4	0.267 7	b^-
1289.4		b^-
1297.34 9	0.0104 12	b^-
1303.20 11	0.0086 10	b^-
1306.4 4	0.0062 10	b^-
1323.77 8	0.025 5	b^-
1336.38 7	0.0183 12	b^-
1348.81 4	0.120 4	b^-
1367.9 2	0.016 3	b^-
1379.3 4	0.0017 10	b^-
1383.94 17	0.0054 10	b^-
1409.12 8	0.0333 17	b^-
1435.59 6	0.0257 25	b^-
1451.91 4	0.0452 20	b^-
1459.32 6	0.0094 10	b^-
1466.33 6	0.0074 10	b^-
1479.43 4	0.227 7	b^-
1483.09 9	0.0205 17	b^-
1486.90 7	0.0020 15	b^-
1497.0 4	0.0006 4	b^-
1509.0 4	0.0007 4	b^-
1529.00 7	0.222 10	b^-
1530.7 5	0.025 5	b^-
1538.9 2	0.0014 5	b^-
1540.6 2	0.0007 5	b^-
1545.0 5	0.0022 10	b^-
1550.0 2	0.052 25	b^-
1550.94 9	0.272 25	b^-
1552.22 16	0.052 25	b^-
1558.35 10	0.0168 17	b^-
1561.30 5	0.095 4	b^-
1570.46 7	0.0153 12	b^-
1573.74 5	0.0482 20	b^-
1578.62 5	0.077 3	b^-
1586.1 2	0.0049 25	b^-
1590.68 5	0.52 4	b^-
1601.8 3	0.0027 12	b^-
1604.14 5	0.102 4	b^-
1616.3 2	0.0030 7	b^-
1618.80 4	0.115 4	b^-
1628.17 5	0.055 3	b^-
1637.95 5	0.161 20	b^-
1659.18 10	0.0126 10	b^-
1661.63 5	0.225 7	b^-
1669.50 5	0.0156 10	b^-
1680.69 18	0.00106 20	b^-
1690.15 16	0.0012 5	b^-
1714.61 9	0.00215 22	b^-
1737.94 5	0.111 7	b^-
1756.1 2	0.00141 22	b^-
1759.30 5	0.0212 17	b^-
1764.2 2	0.00089 20	b^-
1769.47 7	0.0020 4	b^-
1778.92 6	0.0222 12	b^-
1780.5 2	0.0040 10	b^-
1794.7 4	0.00037 12	b^-
1801.53 6	0.0094 10	b^-
1804.8 2	0.00091 22	b^-
1813.73 6	0.00272 25	b^-
1821.70 12	0.0015 3	b^-
1827.39 5	0.0190 15	b^-
1832.6 3	0.00047 22	b^-
1836.71 6	0.0047 5	b^-
1843.86 5	0.0089 7	b^-
1855.34 12	0.0015 5	b^-
1858.7 2	0.00077 12	b^-
1863.19 18	0.00094 15	b^-
1866.48 6	0.0049 7	b^-
1869.81 15	0.00099 20	b^-
1875.56 12	0.00084 20	b^-
1881.70 5	0.0074 7	b^-
1886.80 5	0.0124 7	b^-
1897.8 2	0.00044 10	b^-
1904.26 10	0.00121 15	b^-
1909.27 9	0.00141 15	b^-
1924.56 5	0.0082 7	b^-
1940.43 18	0.00054 10	b^-
1944.79 15	0.00035 17	b^-
1953.6 5	0.00010 5	b^-
1974.2 3	0.00030 10	b^-
1983.2 3	0.00030 10	b^-
1989.63 8	0.00104 20	b^-
2000.3 5	0.00012 7	b^-
2029.39 8	0.00116 12	b^-
2032.49 11	0.0010 4	b^-
2058.18 6	0.00143 10	b^-
2065.0 2	0.00042 10	b^-
2068.69 8	0.00151 10	b^-
2083.1 2	0.00032 7	b^-
2091.4 3	0.00020 5	b^-
2103.18 7	0.00156 15	b^-
2123.66 7	0.00259 17	b^-
2128.57 9	0.00128 12	b^-
2140.2 3	0.00022 5	b^-
2146.05 7	0.00304 17	b^-
2149.5 2	0.00047 7	b^-
2156.05 17	0.00035 7	b^-
2168.33 7	0.00109 10	b^-
2184.79 15	0.00027 5	b^-
2203.4 5	0.000074 25	b^-
2234.4 3	0.00015 5	b^-
2259.2 4	0.00010 5	b^-
2287.0 6	0.000049 25	b^-

X-rays from ^246mAm (25.0 m 2)
E (keV)	I (%)	Assignment

12.633	0.73 13	Cm L_l
14.746	1.11 16	Cm L_a2
14.961	9.9 14	Cm L_a1
17.286	0.20 3	Cm L_b6
17.314	0.24 3	Cm L_h
18.081	2.7 4	Cm L_b2
18.589	0.5 3	Cm L_b4
18.853	0.62 9	Cm L_b5
19.427	8.7 10	Cm L_b1
19.688	0.4 3	Cm L_b3
22.735	2.2 3	Cm L_g1
23.028	0.21 15	Cm L_g2
23.319	0.17 12	Cm L_g3
23.527	0.45 6	Cm L_g6
103.715	0.0054 11	Cm K_a3
104.590	1.18 23	Cm K_a2
109.271	1.9 4	Cm K_a1
122.304	0.23 5	Cm K_b3
123.403	0.44 9	Cm K_b1
124.124	0.018 4	Cm K_b5
126.888	0.17 3	Cm K_b2
127.352	0.067 13	Cm K_b4

Betas from ^246mAm (25.0 m 2)
Eb endpoint (keV)	Ib (%)	Decay mode

234.58	0.011 2	b^-
259.95	0.0046 2	b^-
373.5	0.015	b^-
422.65	0.018 3	b^-
458.91	0.008 1	b^-
481.44	0.016 1	b^-
496.68	0.006 1	b^-
499.88	0.0018 3	b^-
504.68	0.022 2	b^-
507.92	0.011 7	b^-
519.23	0.058 7	b^-
530.48	0.036 13	b^-
535.79	0.029 3	b^-
549.43	0.19 5	b^-
569.27	0.010 3	b^-
584.24	0.024 2	b^-
625.19	0.28 2	b^-
693.61	0.026 3	b^-
725.18	0.17 2	b^-
735	0.44 2	b^-
744.34	0.35 1	b^-
746.81	0.044 3	b^-
772.47	0.68 4	b^-
777.09	0.007 3	b^-
784.5	0.98 3	b^-
801.83	0.206 7	b^-
804.77	0.97 2	b^-
812.3	1.86 5	b^-
832.26	0.073 6	b^-
880.07	1.65 3	b^-
896.72	0.05	b^-
927.57	0.10 1	b^-
954.11	0.10 1	b^-
1026.77	0.027	b^-
1039.37	1.1 3	b^-
1057.14	4.8 8	b^-
1065.84	0.037 3	b^-
1088.43	0.28 1	b^-
1105.56	0.021 11	b^-
1116.6	0.01	b^-
1156.22	0.49 18	b^-
1186.1	0.01	b^-
1195.47	0.048 7	b^-
1231.26	0.022 4	b^-
1240.51	0.02	b^-
1277.98	1.8 2	b^-
1281.73	0.24 6	b^-
1301.15	14.7 9	b^-
1327.15	37.4 12	b^-
1529.57	6.9 5	b^-
1564.33	16.1 6	b^-
2263.99	0.5 3	b^-
2363.15	7	b^-
2406	2	b^-

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