Table of Isotopes decay data

WWW Table of Radioactive Isotopes

154	Eu
63	Eu	91

Half life:

8.593 y 4

Jp:

S_n (keV):

6442.0 3

S_p (keV):

6467.9 8

Prod. mode:

Fission product
Fast neutron activation
Thermal neutron activation

ENSDF citation:

NDS 69,507 (1993)

Literature cut-off date:

1-Mar-1993

Author(s):

R.G. Helmer

Update:

Unknown, T.W. Burrows

References since cut-off:

¹⁵⁴Eu decay from 1998-98 (NSR)


Decay properties:
Mode	Branching (%)	Q-value (keV)
b^-	99.98 1	1968.4 11
e+b⁺	0.02 1	717.3 11

Most Recent ENSDF Data (12/2002)
Mode	Data set name	Display data
b^-	154EU B- DECAY (8.593 Y)
	Tables:
	ENSDF data:
	Java applets:
e+b⁺	154EU EC DECAY (8.593 Y)
	Tables:
	ENSDF data:
	Java applets:

TORI Data (1999) Gammas from ¹⁵⁴Eu (8.593 y 4)
Eg (keV)	Ig (%)	Decay mode

58.4	0.0039 4	b^-
80.4	0.0030 8	b^-
81.99 2	0.0034 23	e
122.651 5	0.0070 21	b^-
123.071 1	40.79 25	b^-
129.5	0.0137 21	b^-
131.544 5	0.0112 5	b^-
134.8235 12	0.0072 4	b^-
146.05 5	0.0260 11	b^-
156.17	0.0099 4	b^-
159.9	0.0011 5	b^-
162.58 12	0.0011 4	b^-
165.7	0.0025 5	b^-
180.7	0.0040 5	b^-
184.7	0.0038 7	b^-
184.810 25	0.0042 11	e
188.254 4	0.241 4	b^-
195.5 5	0.0021 11	b^-
209.4 4	0.0025 5	b^-
219.4	0.0023 5	b^-
229.0 5	0.0024 6	b^-
232.101 3	0.0238 10	b^-
237.7	0.0063 25	b^-
247.925 6	6.95 3	b^-
260.2	0.0022 6	b^-
267.499 16	0.0137 7	b^-
267.499 16	0.0137 7	b^-
269.83	0.0072 8	b^-
274.0 5	0.00391 18	b^-
279.640 15	0.00299 14	b^-
290.0	0.00338 18	b^-
295.7	0.00239 14	b^-
296	0.0014 11	b^-
301.25	0.0103 4	b^-
305.14	0.0306 11	b^-
308.2	0.0024 6	b^-
312.26	0.0187 14	b^-
315.4	0.0074 14	b^-
320 1	0.0010 7	b^-
322.01 5	0.0665 18	b^-
329.920 4	0.0092 5	b^-
346.643 5	0.0292 11	b^-
368.21	0.00299 14	b^-
370.568 19	0.0056 11	b^-
375.2 5	0.0020 6	b^-
382.025 7	0.0100 4	b^-
397.14 2	0.0289 11	b^-
401.258 14	0.1911 21	b^-
403.505 5	0.0264 11	b^-
414.30	0.00500 25	b^-
419.55 5	0.0035 11	b^-
422.0	0.0022 8	b^-
435.9	0.0039 11	b^-
444.484 6	0.565 5	b^-
463.9	0.00429 25	b^-
467.84 5	0.0609 18	b^-
478.27 4	0.2263 18	b^-
480.61	0.0049 3	b^-
483.68 2	0.0050 3	b^-
484.64	0.00398 21	b^-
488.26	0.0070 25	b^-
506.44 4	0.0063 11	b^-
510.6	0.060 7	b^-
512.0	0.032 7	b^-
518.011 16	0.0475 21	b^-
533.13 3	0.0113 18	b^-
546.082 14	0.0144 14	b^-
557.581 7	0.2699 25	b^-
563.4		b^-
569.23	0.0101 8	b^-
582.096 12	0.894 7	b^-
591.763 5	4.990 25	b^-
597.73 2	0.0056 3	b^-
598.22 2	0.0062 7	b^-
598.96 4	0.006 4	b^-
602.688 9	0.0338 14	b^-
613.288 10	0.094 3	b^-
620.52	0.0092 5	b^-
625.257 6	0.320 3	b^-
642.40 2	0.0046 14	b^-
649.564 11	0.078 3	b^-
650.96 18	0.0099 4	b^-
664.68 5	0.0289 11	b^-
669.152 16	0.0134 18	b^-
676.593 6	0.158 7	b^-
680.652 7		b^-
692.421 7	1.802 11	b^-
715.817 9	0.189 9	b^-
723.304 5	20.22 9	b^-
737.6	0.0063 25	b^-
756.763 6	4.57 3	b^-
774.4	0.008 3	b^-
790.12	0.0106 21	b^-
800.729 15	0.032 5	b^-
801.2		b^-
815.507 9	0.516 3	b^-
830.3	0.008 3	b^-
845.46 2	0.591 4	b^-
850.64 3	0.244 3	b^-
873.190 5	12.27 3	b^-
880.634 10	0.081 3	b^-
892.780 7	0.518 4	b^-
898.37	0.0020 5	b^-
904.076 6	0.898 5	b^-
905.99 6	0.0119 6	b^-
919.24	0.0123 6	b^-
924.55 3	0.0623 21	b^-
928.4	0.0046 21	b^-
981.59 6	0.0084 14	b^-
984.5	0.0095 18	b^-
996.262 5	10.6 4	b^-
1004.725 6	18.01 5	b^-
1012.8 2	0.0029 12	b^-
1023 1	0.0067 18	b^-
1033.4	0.0118 6	b^-
1047.177 13	0.0500 25	b^-
1049.4 1	0.0174 7	b^-
1072.2	0.0035 14	b^-
1110	0.0028 21	b^-
1118.233 16	0.109 14	b^-
1124.2	0.0069 10	b^-
1128.558 7	0.320 4	b^-
1136.1	0.0074 10	b^-
1140.711 9	0.2368 21	b^-
1153.1 5	0.0109 25	b^-
1160.5 3	0.0440 18	b^-
1171.24 14	0.0037 10	b^-
1188.90 12	0.094 3	b^-
1216.8	0.0034 10	b^-
1232	0.008 4	b^-
1241.299 14	0.134 5	b^-
1246.150 9	0.869 4	b^-
1274.436 6	35.19 18	b^-
1290.0 2	0.0250 25	b^-
1291.326 17	0.0128 5	b^-
1295.07 13	0.0092 6	b^-
1316.4	0.018 3	b^-
1387.0 5	0.0194 14	b^-
1399.7 3	0.0032 6	b^-
1408.2 2	0.0232 18	b^-
1414.49 5	0.00401 21	b^-
1417.88 11	0.0109 14	b^-
1419.0	0.00197 11	b^-
1426.4 4	0.0012 5	b^-
1490.6 4	0.0029 3	b^-
1494.048 9	0.704 7	b^-
1510.0 5	0.0048 8	b^-
1522 1	0.0006 3	b^-
1531.4 3	0.0060 4	b^-
1537.82 3	0.0531 18	b^-
1554	0.0011 5	b^-
1596.495 18	1.798 11	b^-
1667.3	0.00194 25	b^-
1673.7	0.00172 25	b^-
1716.9	0.00060 25	b^-
1773 1	0.00032 14	b^-
1838.0 5	0.00084 18	b^-
1895 1	0.00063 18	b^-

X-rays from ¹⁵⁴Eu (8.593 y 4)
E (keV)	I (%)	Assignment

5.362	0.117 12	Gd L_l
6.026	0.308 19	Gd L_a2
6.050	0.050 4	Gd L_h
6.058	2.78 17	Gd L_a1
6.687	0.083 13	Gd L_b4
6.713	2.14 16	Gd L_b1
6.832	0.136 21	Gd L_b3
6.867	0.0275 17	Gd L_b6
7.102	0.58 4	Gd L_b2
7.243	0.0047 3	Gd L_b5
7.790	0.36 3	Gd L_g1
7.930	0.0030 3	Gd L_g6
8.087	0.026 4	Gd L_g2
8.105	0.037 6	Gd L_g3
41.864	0.00227 7	Gd K_a3
42.309	7.41 16	Gd K_a2
42.996	13.4 3	Gd K_a1
48.551	1.32 3	Gd K_b3
48.695	2.56 6	Gd K_b1
49.038	0.0404 16	Gd K_b5
49.959	0.857 18	Gd K_b2
50.099	0.332 14	Gd K_b4

Betas from ¹⁵⁴Eu (8.593 y 4)
Eb endpoint (keV)	Ib (%)	Decay mode

129.79	0.019 3	b^-
171.44	0.068 6	b^-
248.84	28.59 20	b^-
307.5	0.830 10	b^-
322.58	0.147 4	b^-
351.26	1.610 10	b^-
408.4	0.097 3	b^-
437.1	0.300 10	b^-
450.51	0.005	e
550.24	0.108 4	b^-
570.87	36.3 3	b^-
635.32	0.015	e
704.61	0.720 10	b^-
716.76	0.310 10	b^-
840.61	16.8 5	b^-
972.14	3.5 12	b^-
1152.91	0.7 5	b^-
1597.4	0.19 5	b^-
1845.33	10.0 12	b^-

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