Table of Isotopes decay data

WWW Table of Radioactive Isotopes

156	Eu
63	Eu	93

Half life:

15.19 d 8

Jp:

0+

S_n (keV):

6337 5

S_p (keV):

7182 5

Prod. mode:

Fission product
Fast neutron activation

ENSDF citation:

NDS 65,65 (1992)

Literature cut-off date:

1-May-1991

Author(s):

R.G. Helmer

References since cut-off:

¹⁵⁶Eu decay from 1991-98 (NSR)


Decay properties:
Mode	Branching (%)	Q-value (keV)
b^-	100	2451 5

Most Recent ENSDF Data (12/2002)
Mode	Data set name	Display data
b^-	156EU B- DECAY
	Tables:
	ENSDF data:
	Java applets:

TORI Data (1999) Gammas from ¹⁵⁶Eu (15.19 d 8)
Eg (keV)	Ig (%)	Decay mode

88.9667 14	8.4 9	b^-
138.7 2	0.0079 9	b^-
160.2 2	0.0103 11	b^-
190.16 8	0.0165 16	b^-
199.2132 10	0.74 4	b^-
215.7 2	0.013 3	b^-
244.7 3	0.009 3	b^-
281.4 2	0.0078 19	b^-
290.49 15	0.0087 19	b^-
317.30 9	0.060 6	b^-
335.69 11	0.0102 14	b^-
348.702 7	0.0136 19	b^-
354.20 9	0.0145 19	b^-
434.465 13	0.209 4	b^-
472.700 9	0.145 4	b^-
490.32 3	0.160 4	b^-
494.90 15	0.015 4	b^-
498.88 6	0.066 4	b^-
554.66 6	0.017 4	b^-
585.80 7		b^-
585.80 7	0.047	b^-
599.52 3	2.085 11	b^-
626	0.022 4	b^-
632.79 8	0.039 5	b^-
646.22 3	6.28 3	b^-
660	0.014 4	b^-
665.48 30	<0.006	b^-
707.1 2	0.065 5	b^-
709.90 3	0.876 7	b^-
723.48 5	5.418 24	b^-
768.56 7	0.087 4	b^-
778	0.026 4	b^-
784.14 10	0.049 4	b^-
797.73 6	0.109 5	b^-
811.79 5	9.70 4	b^-
820.36 7	0.169 5	b^-
836.52 7	0.081 5	b^-
839.0 2	0.030 5	b^-
841.20 3	0.208 5	b^-
858.36 12	0.205 5	b^-
865.80 20	0.188 11	b^-
867.01 8	1.328 13	b^-
872.39 9	0.040 5	b^-
903.62 10	0.040 5	b^-
916.4	0.032 6	b^-
928.8 4	0.028 5	b^-
944.35 7	1.331 9	b^-
947.46 15	0.292 6	b^-
960.55 12	1.45 3	b^-
961.0 6	0.15 3	b^-
963	0.034 5	b^-
969.86 4	0.373 6	b^-
1011.87 5	0.314 6	b^-
1018.50 10	0.084 5	b^-
1027.39 8	0.128 5	b^-
1037	0.053 5	b^-
1040.43 5	0.501 5	b^-
1049.46		b^-
1065.15 5	4.922 19	b^-
1076	0.338 7	b^-
1079.24	4.589 18	b^-
1101.80 11	0.042 6	b^-
1115.78 7	0.050 5	b^-
1129.41 10	0.135 6	b^-
1140.51 5	0.283 6	b^-
1153.67 10	6.79 6	b^-
1154.19 13	4.73 4	b^-
1156	0.131 19	b^-
1164.2 3	0.065 6	b^-
1168.0 4		b^-
1169.09 7	0.266 5	b^-
1187.3 5	0.015 7	b^-
1220.50 11	0.019 5	b^-
1230.68 6	7.98 3	b^-
1242.47 6	6.601 23	b^-
1257.98 7	0.095 3	b^-
1277.43 6	2.886 12	b^-
1366.44 7	1.572 9	b^-
1625.5 3	0.046 6	b^-
1682.2 2	0.272 8	b^-
1857.42 11	0.240 7	b^-
1873	0.059 12	b^-
1877.03 15	1.512 12	b^-
1937.71 11	1.944 14	b^-
1946.34 13	0.165 7	b^-
1965.2 3	3.870 19	b^-
2026.65 11	3.272 16	b^-
2032.51 12	0.131 5	b^-
2097.70 11	3.809 18	b^-
2110.52 13	0.079 3	b^-
2116.49 13	0.114 3	b^-
2121.3 4	0.0047 22	b^-
2170.86 20	0.0322 23	b^-
2180.91 12	2.142 13	b^-
2186.71 11	3.485 17	b^-
2205.38 5	0.878 7	b^-
2205.4		b^-
2211.83 12	0.0984 23	b^-
2255.5 5	0.0060 11	b^-
2259.8 3	0.0114 12	b^-
2269.90 12	1.031 8	b^-
2293.40 12	0.0224 12	b^-
2301.0 2	0.0104 9	b^-
2344.3 7	0.0040 7	b^-
2361.2 3	0.0168 11	b^-

X-rays from ¹⁵⁶Eu (15.19 d 8)
E (keV)	I (%)	Assignment

5.362	0.077 11	Gd L_l
6.026	0.203 25	Gd L_a2
6.050	0.035 4	Gd L_h
6.058	1.83 22	Gd L_a1
6.687	0.038 7	Gd L_b4
6.713	1.47 19	Gd L_b1
6.832	0.063 11	Gd L_b3
6.867	0.0182 22	Gd L_b6
7.102	0.38 5	Gd L_b2
7.243	0.0031 4	Gd L_b5
7.790	0.25 3	Gd L_g1
7.930	0.0021 3	Gd L_g6
8.087	0.0121 23	Gd L_g2
8.105	0.017 3	Gd L_g3
41.864	0.00110 12	Gd K_a3
42.309	3.6 4	Gd K_a2
42.996	6.5 7	Gd K_a1
48.551	0.64 7	Gd K_b3
48.695	1.24 13	Gd K_b1
49.038	0.0196 21	Gd K_b5
49.959	0.42 4	Gd K_b2
50.099	0.161 17	Gd K_b4

Betas from ¹⁵⁶Eu (15.19 d 8)
Eb endpoint (keV)	Ib (%)	Decay mode

150.13	0.11 1	b^-
157.55	0.90 7	b^-
181.08	4.2 4	b^-
245.46	2.2 2	b^-
247.5	0.15 4	b^-
264.21	10.3 10	b^-
329.58	0.13 1	b^-
424.36	5.7 6	b^-
485.03	29 3	b^-
498.59	0.92 8	b^-
504.62	0.40 4	b^-
1084.51	2.1 2	b^-
1131.26	0.28 5	b^-
1208.5	5.3 5	b^-
1282.78	4.1 4	b^-
1401.5	1.28 10	b^-
2451	32 3	b^-

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