Table of Isotopes decay data

WWW Table of Radioactive Isotopes

44	K
19	K	25

Half life:

22.13 m 19

Jp:

2-

S_n (keV):

7289 37

S_p (keV):

11122 79

Prod. mode:

Fast neutron activation

ENSDF citation:

NP A521,1 (1990)

Literature cut-off date:

1-Jun-1990

Author(s):

P.M. Endt

References since cut-off:

⁴⁴K decay from 1990-98 (NSR)


Decay properties:
Mode	Branching (%)	Q-value (keV)
b^-	100	5659 36

Most Recent ENSDF Data (12/2002)
Mode	Data set name	Display data
b^-	44K B- DECAY
	Tables:
	ENSDF data:
	Java applets:

TORI Data (1999) Gammas from ⁴⁴K (22.13 m 19)
Eg (keV)	Ig (%)	Decay mode

174.35 25	0.058 12	b^-
209.98 25	0.017 12	b^-
263.53	0.11 3	b^-
353.67	0.017 12	b^-
368.21	2.25 4	b^-
374.77	0.19 5	b^-
403.94	0.064 17	b^-
463.3 4	0.017 17	b^-
646.61	0.09 3	b^-
651.35	3.02 12	b^-
667.46	0.023 12	b^-
682.34	0.08 4	b^-
726.46	3.77 12	b^-
733.08	0.16 7	b^-
747.62	2.09 12	b^-
761.18	0.12 6	b^-
766.8 5	0.05 4	b^-
876.54	1.73 4	b^-
891.08	0.09 4	b^-
983.58 15	0.17 6	b^-
1005.02	0.029	b^-
1019.56	0.84 4	b^-
1024.71	6.67 12	b^-
1050.55	0.56 8	b^-
1074.0	0.09 5	b^-
1101.29	0.012 12	b^-
1106.26 25	0.10 3	b^-
1107.85	0.67 5	b^-
1119.68	0.017 12	b^-
1126.08	7.60 12	b^-
1157.031	58	b^-
1195.4 2	0.05 4	b^-
1222.49	0.48 5	b^-
1244.74	0.83 3	b^-
1272.8 4	0.08 8	b^-
1364.0	0.012 12	b^-
1377.6 5	0.12 6	b^-
1427.5 4	0.11 5	b^-
1499.43	7.8 3	b^-
1576.15	0.17 5	b^-
1625.0 7	0.035 23	b^-
1634.52 11	0.23 5	b^-
1658.7	0.21 5	b^-
1701.88	0.10 4	b^-
1752.62	4.06 6	b^-
1777.98	2.12 5	b^-
1808.8	0.07 5	b^-
1884.4	0.023 17	b^-
1887.24	0.12 6	b^-
1893.2	0.11 5	b^-
1896.08 10	0.11 8	b^-
1916	0.13 7	b^-
1977.0	0.05 4	b^-
1994.5	0.07 5	b^-
2144.2	0.75 5	b^-
2150.76	22.7 5	b^-
2167	0.08 4	b^-
2200.1	0.012 12	b^-
2269.42	0.029 23	b^-
2324.3	0.035 23	b^-
2338.3 6	0.041 23	b^-
2423.3	0.041 23	b^-
2497.3 9	0.03 3	b^-
2504.41	0.65 5	b^-
2518.95	9.69 17	b^-
2598.4 6	0.04 3	b^-
2619.07	0.21 4	b^-
2656.41	0.98 5	b^-
2710	0.017 17	b^-
2740.4 8	0.006 5	b^-
2847.2	0.029 17	b^-
2934.8	0.046 17	b^-
2973 1	0.017 12	b^-
2982.46	0.128 17	b^-
3067.0 8	0.012 12	b^-
3103.0	0.064 23	b^-
3158.0	0.151 23	b^-
3201.25	0.70 5	b^-
3217.3 6	0.029 17	b^-
3227.1 8	0.017 12	b^-
3242.2	0.035 17	b^-
3251.98	0.157 23	b^-
3280	0.017 12	b^-
3301.2	0.32 5	b^-
3307.73	0.017 6	b^-
3395.43	1.66 5	b^-
3416	0.058 23	b^-
3661.37	6.09 12	b^-
3675.90	0.015 6	b^-
3726.82	0.029 6	b^-
3755.2 9	0.008 5	b^-
3868.4	0.064 17	b^-
3967.8	0.006 5	b^-
4005.04	0.0012 12	b^-
4074 1	0.005 5	b^-
4162.5 8	0.005 5	b^-
4168	0.009 5	b^-
4210	0.005 5	b^-
4337.9 8	0.005 5	b^-
4403.2	0.0035 23	b^-
4408.92	0.053 9	b^-
4437	0.007 5	b^-
4471.5 6	0.006 5	b^-
4650.7	0.008 5	b^-
4865.79	0.162 6	b^-
4892.3 8	0.003 3	b^-
5025.3	0.0017 12	b^-
5161.95	0.064 4	b^-
5560.1	0.0029 23	b^-

X-rays from ⁴⁴K (22.13 m 19)
E (keV)	I (%)	Assignment

0.350	1.4E-06 4	Ca L_b1
0.412	4.0E-07 12	Ca L_b4
0.412	6.3E-07 19	Ca L_b3
3.600	8.4E-11 5	Ca K_a3
3.688	0.000423 22	Ca K_a2
3.692	0.00084 4	Ca K_a1
4.013	4.44E-05 23	Ca K_b3
4.013	8.8E-05 5	Ca K_b1

Betas from ⁴⁴K (22.13 m 19)
Eb endpoint (keV)	Ib (%)	Decay mode

99.5	0.030 18	b^-
293	0.023 18	b^-
335	0.009 5	b^-
458.9	0.11 5	b^-
497.72	0.066 4	b^-
529.6	0.029 17	b^-
634.4	0.08 2	b^-
775.96	0.68 7	b^-
793.92	0.29 2	b^-
836	0.08 4	b^-
1009	0.08 5	b^-
1087	0.19 7	b^-
1107.38	4.3 2	b^-
1223	0.024 12	b^-
1250.84	7.2 2	b^-
1260.6	0.035 17	b^-
1301.58	1.5 1	b^-
1344.8	0.37 6	b^-
1399.8	0.12 5	b^-
1568	0.12 5	b^-
1883.8	0.23 4	b^-
1983.93	11.0 2	b^-
1998.47	6.2 2	b^-
2079.6	0.04 3	b^-
2302.8	0.10 5	b^-
2352.14	28.5 5	b^-
2358.7	0.21 10	b^-
2615.67	0.10 9	b^-
3376.86	0.6 2	b^-
3776.49	1.5 2	b^-
4502.95	1.7 6	b^-
5660	34 10	b^-

Main page | Radiation search | Nuclide search