Table of Isotopes decay data

WWW Table of Radioactive Isotopes

254	Es
99	Es	155

Half life:

275.7 d 5

Jp:

(7+)

S_n (keV):

5092 5

S_p (keV):

4598 7

Prod. mode:

Thermal neutron activation

ENSDF citation:

NDS 57,590 (1989)

Literature cut-off date:

1-Dec-1988

Author(s):

M.R. Schmorak

Update:

Unknown, J. Tuli

References since cut-off:

²⁵⁴Es decay from 1998-98 (NSR)


Decay properties:
Mode	Branching (%)	Q-value (keV)	References
a	100	6615.7 15	73Ah04
e	<1E-4	652 13
b^-	1.74E-6 8	1088 3	85Ok04
SF	<3E-6

Data sets:
Mode	Data set name	Display data
a	254ES A DECAY (275.7 D)
	Tables:
	ENSDF data:
	Java applets:
e	254ES EC DECAY (275.7 D)
	Tables:
	ENSDF data:
	Java applets:
b^-	254ES B- DECAY (275.7 D)
	Tables:
	ENSDF data:
	Java applets:

Gammas from ²⁵⁴Es (275.7 d 5)
Eg (keV)	Ig (%)	Decay mode

1.11 70		a
8.1 2		a
34.4 1		a
35.5 1		a
42.6 1		a
63.0 20	2.0 2	a
69.7 1		a
70.4 1		a
80.8 1		a
85.1 1		a
94.9		a
150 2	0.020 3	a
233 2	0.008 1	a
249 2	0.025 4	a
264 2	0.05 1	a
278 2	0.03 1	a
285	0.01	a
304 2	0.07 1	a
316 2	0.15 2	a
342 2	0.009 2	a
348 2	0.007 1	a
377 2	0.015 2	a
385 2	0.05 1	a

X-rays from ²⁵⁴Es (275.7 d 5)
E (keV)	I (%)	Assignment

12.890	2.6 12	Bk L_l
15.082	3.8 18	Bk L_a2
15.308	34 16	Bk L_a1
17.687	0.7 3	Bk L_b6
17.826	0.6 4	Bk L_h
18.508	9 4	Bk L_b2
19.118	3.9 8	Bk L_b4
19.311	2.2 10	Bk L_b5
20.018	20 15	Bk L_b1
20.280	3.0 6	Bk L_b3
23.416	5 4	Bk L_g1
23.698	1.8 4	Bk L_g2
24.007	1.4 3	Bk L_g3
24.241	1.1 8	Bk L_g6
106.300	0.00056 22	Bk K_a3
107.185	0.11 4	Bk K_a2
112.121	0.17 7	Bk K_a1
125.418	0.022 9	Bk K_b3
126.580	0.041 16	Bk K_b1
127.316	0.0017 7	Bk K_b5
130.152	0.016 6	Bk K_b2
130.630	0.0064 25	Bk K_b4

Alphas from ²⁵⁴Es (275.7 d 5)
Ea (keV)	Ia (%)

6000 20	~0.03
6048 5	0.16
6105 2	0.34 2
6177	~0.02
6184	0.06 3
6194 2	0.04 2
6258	<0.02
6266 2	0.22 4
6275	0.14 2
6324 2	0.04 1
6347 2	0.75 5
6358.6 20	2.6 3
6378	<0.01
6383	<0.1
6415.8 20	1.8 1
6428.8 20	93.1 10
6435	~0.03
6476	0.23 4
6478	<0.05
6512	~0.0046

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