Table of Isotopes decay data

WWW Table of Radioactive Isotopes

158	Eu
63	Eu	95

Half life:

45.9 m 2

Jp:

(1-)

S_n (keV):

5815 77

S_p (keV):

7766 92

Prod. mode:

Fission product
Fast neutron activation

ENSDF citation:

NDS 77,471 (1996)

Literature cut-off date:

1-Oct-1995

Author(s):

R.G. Helmer

References since cut-off:

¹⁵⁸Eu decay from 1995-98 (NSR)


Decay properties:
Mode	Branching (%)	Q-value (keV)
b^-	100	3485 77

Most Recent ENSDF Data (12/2002)
Mode	Data set name	Display data
b^-	158EU B- DECAY
	Tables:
	ENSDF data:
	Java applets:

TORI Data (1999) Gammas from ¹⁵⁸Eu (45.9 m 2)
Eg (keV)	Ig (%)	Decay mode

79.5104 14	10.5 18	b^-
181.930 4	2.34 24	b^-
218.4 4	0.045 15	b^-
245.408 45	0.096 12	b^-
528.022 17	1.53 9	b^-
606.425 20	3.96 21	b^-
698.578 25	1.06 6	b^-
743.055 30	3.60 18	b^-
751.88 4	0.28 5	b^-
763.95 4	0.63 5	b^-
769.85 4	0.65 5	b^-
776.95 5	0.78 9	b^-
780.14 4	0.90 9	b^-
816.39 4	0.366 24	b^-
824.09 4	1.29 9	b^-
827.75 5	0.39 4	b^-
852.86 4	0.40 3	b^-
870.86 5	0.24 3	b^-
870.86 5	1.26 12	b^-
879.31 15	0.17 3	b^-
897.622 13	12.4 6	b^-
906.46 5	1.83 12	b^-
917.47 5	0.28 4	b^-
922.4 3	0.31 4	b^-
922.50 5	1.62 18	b^-
925.62 7	0.12 3	b^-
940.28 14	0.33 9	b^-
944.09 5	30	b^-
952.93 6	1.98 12	b^-
962.06 4	1.89 12	b^-
977.131 13	16.3 8	b^-
986.84 6	1.35 9	b^-
998.36 5	0.38 4	b^-
1004.00 8	0.48 9	b^-
1005.78 9	1.23 15	b^-
1034.47 6	0.14 3	b^-
1061.68 16	0.32 3	b^-
1107.63 7	5.13 24	b^-
1116.48 5	1.26 9	b^-
1130.2 4	0.018 9	b^-
1138.3 3	0.21 3	b^-
1141.44 5	0.18 3	b^-
1166.5 5	0.015 9	b^-
1180.31 9	0.33 6	b^-
1183.97 8	3.0 4	b^-
1185.99 8	2.9 5	b^-
1187.13 9	4.4 3	b^-
1215.7 4	0.084 18	b^-
1233.7 2	0.16 3	b^-
1245.1 4	0.030 12	b^-
1250.4 4	0.033 12	b^-
1256.0 8	<0.030	b^-
1259.83 8	0.39 6	b^-
1263.54 9	2.19 18	b^-
1263.6 4	0.21 9	b^-
1284.0 2	0.063 9	b^-
1292.3 2	0.27 3	b^-
1301.68 14	0.183 18	b^-
1312.08 12	0.267 21	b^-
1323.39 5	0.228 18	b^-
1347.95 13	1.65 9	b^-
1353.64 14	0.117 15	b^-
1363.2 4	0.036 9	b^-
1372.0 2	0.13 3	b^-
1372.90 14	0.08 3	b^-
1433.7 3	0.063 24	b^-
1437.89 12	0.036 12	b^-
1475.2 4	0.048 12	b^-
1492.5 7	0.024 12	b^-
1517.44 11	0.030 9	b^-
1531.4 5	0.060 12	b^-
1552.0 7	0.033 9	b^-
1563.8 6	0.027 9	b^-
1596.9 7	0.024 6	b^-
1644.0 4	0.036 12	b^-
1657.3 8	0.018 9	b^-
1693.4 3	0.063 15	b^-
1702.8 2	0.135 18	b^-
1712.7	0.183 21	b^-
1738.0 3	0.126 24	b^-
1768.5 5	0.039 9	b^-
1785.0 3	0.072 12	b^-
1793.5 15	0.015 6	b^-
1815.1 5	0.036 9	b^-
1835.9 6	0.036 9	b^-
1850.3 4	0.15 3	b^-
1857.0 5	0.096 21	b^-
1883.0 11	1.23 6	b^-
1930.2 6	0.045 9	b^-
1943.4 5	1.62 9	b^-
1956.2 3	0.090 12	b^-
1964.2 3	0.132 15	b^-
2023.8 6	0.92 5	b^-
2136.4 9	0.13 4	b^-
2139.0 4	0.26 7	b^-
2163.4 4	0.042 6	b^-
2189.3 8	0.027 6	b^-
2194.2 7	0.033 9	b^-
2203.8 4	0.084 12	b^-
2215.3 3	0.111 15	b^-
2246.1 3	0.46 3	b^-
2260.7 3	0.246 24	b^-
2268.2 5	0.063 9	b^-
2273.7 5	0.051 9	b^-
2315.3 10	0.021 9	b^-
2326.0 15	0.018 6	b^-
2340.5 10	0.030 9	b^-
2367.7 3	0.79 4	b^-
2395.6 5	0.051 9	b^-
2402.7 4	0.048 9	b^-
2421.0 11	0.015 6	b^-
2447.4 4	0.76 6	b^-
2451.2 6	0.225 6	b^-
2464 2	0.012 6	b^-
2475.5 5	0.039 6	b^-
2499.0 10	0.062 4	b^-
2514.0 5	0.108 9	b^-
2521	0.007 4	b^-
2542.0 16	0.011 3	b^-
2564 2	0.009 3	b^-
2601	0.029 5	b^-
2640 2	0.011 5	b^-
2673 2	0.012 5	b^-
2703 2	0.033 6	b^-
2743	0.063 6	b^-
2764 2	0.019 4	b^-
2806 3	0.0051 24	b^-
2823	0.033 6	b^-
2844 2	0.021 4	b^-
2873 2	0.0048 24	b^-
2884 2	0.005 3	b^-
2967 3	0.0048 24	b^-

X-rays from ¹⁵⁸Eu (45.9 m 2)
E (keV)	I (%)	Assignment

5.362	0.15 3	Gd L_l
6.026	0.39 7	Gd L_a2
6.050	0.067 12	Gd L_h
6.058	3.5 6	Gd L_a1
6.687	0.062 14	Gd L_b4
6.713	2.8 5	Gd L_b1
6.832	0.102 23	Gd L_b3
6.867	0.035 6	Gd L_b6
7.102	0.73 13	Gd L_b2
7.243	0.0059 11	Gd L_b5
7.790	0.48 9	Gd L_g1
7.930	0.0040 8	Gd L_g6
8.087	0.020 5	Gd L_g2
8.105	0.028 6	Gd L_g3
41.864	0.0018 3	Gd K_a3
42.309	5.8 10	Gd K_a2
42.996	10.5 18	Gd K_a1
48.551	1.04 17	Gd K_b3
48.695	2.0 3	Gd K_b1
49.038	0.032 5	Gd K_b5
49.959	0.67 11	Gd K_b2
50.099	0.26 4	Gd K_b4

Betas from ¹⁵⁸Eu (45.9 m 2)
Eb endpoint (keV)	Ib (%)	Decay mode

630.4	0.036 9	b^-
728.08	0.22 3	b^-
819.4	0.075 16	b^-
869.1	0.13 3	b^-
990.81	0.55 5	b^-
1014.6	0.17 2	b^-
1039.1	0.44 9	b^-
1042.7	1.55 8	b^-
1094.6	0.32 4	b^-
1164.72	3.22 12	b^-
1220.89	1.63 16	b^-
1268.46	0.14 3	b^-
1466.3	3.45 13	b^-
1525.96	6.6 3	b^-
1559.88	7.6 3	b^-
1595.61	0.95 6	b^-
1642.26	2.59 15	b^-
1696.49	7.0 2	b^-
1972.6	0.066 15	b^-
2037.7	0.08 3	b^-
2224.52	0.7 6	b^-
2226.54	3.7 5	b^-
2230.19	0.39 11	b^-
2293.9	0.87 10	b^-
2302.9	0.4 5	b^-
2466.35	25.1 2	b^-
2512.91	21.3 11	b^-
3410.49	9 3	b^-

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