Table of Isotopes decay data

WWW Table of Radioactive Isotopes

99	Y
39	Y	60

Half life:

1.470 s 7

Jp:

(5/2+)

S_n (keV):

5822 34

S_p (keV):

10863 35

Prod. mode:

Fission product

ENSDF citation:

NDS 73,1 (1994)

Literature cut-off date:

1-Aug-1994

Author(s):

L.K. Peker

References since cut-off:

⁹⁹Y decay from 1994-98 (NSR)


Decay properties:
Mode	Branching (%)	Q-value (keV)
b^-	100	7567 14
b^-n	1.9 4

Most Recent ENSDF Data (12/2002)
Mode	Data set name	Display data
b^-	99Y B- DECAY
	Tables:
	ENSDF data:
	Java applets:

TORI Data (1999) Gammas from ⁹⁹Y (1.470 s 7)
Eg (keV)	Ig (%)	Decay mode

53.3 2	0.89 19	b^-
58.3 10	0.14 14	b^-
82.8 10	0.14 5	b^-
87.6 3	0.09 5	b^-
90.5 2	0.33 9	b^-
91.8 2	0.70 19	b^-
94.2 3	0.09 5	b^-
115.6 5	0.23 14	b^-
121.761 3	47	b^-
127.9 3	0.23 5	b^-
130.201 4	7.2 6	b^-
138.1 3	0.38 19	b^-
139.3 4	0.14 5	b^-
141.9 4	0.09 5	b^-
148.9 2	0.23 5	b^-
160.9 8	0.14 9	b^-
185.6 3	0.09 5	b^-
186.4 4	0.66 14	b^-
189.1 3	0.09 5	b^-
192.6 2	1.27 19	b^-
194.3 2	1.78 23	b^-
196.7 3	0.09 5	b^-
206.5 4	0.19 9	b^-
207.4 6	1.2 6	b^-
211.1 6	0.14 9	b^-
215.3 4	0.05 5	b^-
215.8 5	0.23 9	b^-
223.2 4	0.14 5	b^-
226.8 4	0.09 5	b^-
230.7 4	0.09 5	b^-
237.9 3	0.19 9	b^-
276.4 2	2.3 3	b^-
282.3 3	0.33 9	b^-
296.6 3	0.28 9	b^-
299.2 5	0.09 5	b^-
309.5 3	0.23 9	b^-
315.1 4	0.33 14	b^-
323.6 2	0.47 14	b^-
328.5 5	0.14 9	b^-
347.5 3	0.23 9	b^-
382.0 5	0.14 5	b^-
392.4 2	0.56 14	b^-
397.6 3	0.09 5	b^-
405.8 3	2.1 3	b^-
407.2 4	0.23 9	b^-
415.5 2	0.75 14	b^-
421.1 3	0.14 5	b^-
426.6 5	0.33 9	b^-
429.6 3	0.28 9	b^-
453.8 2	4.2 4	b^-
472.5 2	0.94 19	b^-
475.2 3	0.14 5	b^-
510.0 5	0.19 9	b^-
511.1 3	0.23 9	b^-
527.3 3	0.33 14	b^-
536.1 3	13 3	b^-
545.5 3	0.14 5	b^-
570.6 2	0.56 9	b^-
572.8 4	0.28 9	b^-
575.5 2	8.3 11	b^-
599.9 2	2.9 4	b^-
602.5 2	6.8 7	b^-
614.2 2	5.7 6	b^-
639.6 2	3.2 4	b^-
658.4 7	0.80 23	b^-
660.2 3	0.33 9	b^-
702.9 3	0.19 9	b^-
706.4 3	1.17 19	b^-
721.6 3	0.42 14	b^-
724.2 2	17.4 21	b^-
729.9 2	1.59 23	b^-
752.9 7	0.14 9	b^-
761.0 3	0.98 19	b^-
782.0 2	4.4 4	b^-
806.0 5	0.19 14	b^-
826.2 6	0.09 5	b^-
827.6 5	0.28 14	b^-
836.9 4	0.23 9	b^-
845.7 6	0.14 5	b^-
856.6 4	0.14 9	b^-
865.7 4	0.09 5	b^-
883.2 3	0.80 14	b^-
885.0 3	1.6 6	b^-
902.0 5	0.28 14	b^-
929.3 3	1.7 5	b^-
929.8 3	1.22 23	b^-
942.8 2	1.17 19	b^-
954.6 4	0.42 14	b^-
957.2 3	1.13 19	b^-
1005.1 3	1.97 23	b^-
1012.1 2	2.8 5	b^-
1023.9 4	0.28 19	b^-
1024.4 6	0.09 5	b^-
1051.2 6	0.33 14	b^-
1064.4 3	3.8 4	b^-
1073.0 4	0.38 14	b^-
1079.0 4	0.80 19	b^-
1109.1 4	0.23 9	b^-
1311.0 4	0.28 9	b^-
1318.1 8	0.33 19	b^-
1359.6 7	0.19 9	b^-
1463.1 6	0.33 14	b^-
1504.2 7	0.19 9	b^-
1543.7 7	0.23 9	b^-
1594.5 5	0.38 9	b^-
1638.6 7	0.28 19	b^-
1665.9 6	0.7 3	b^-
1691.2 8	0.19 9	b^-
1742.4 5	1.9 4	b^-
1785.7 8	0.8 3	b^-
1789.5 6	0.56 19	b^-
1834.8 6	1.1 3	b^-
1860.6 11	0.28 14	b^-
1872.1 5	0.38 23	b^-
1956.4 8	0.52 14	b^-
1973.1 8	0.33 14	b^-
1997.5 9	0.28 14	b^-

X-rays from ⁹⁹Y (1.470 s 7)
E (keV)	I (%)	Assignment

1.792	0.0081 15	Zr L_l
1.876	0.0043 7	Zr L_h
2.040	0.019 3	Zr L_a2
2.042	0.17 3	Zr L_a1
2.124	0.093 15	Zr L_b1
2.171	0.00104 17	Zr L_b6
2.187	0.0048 12	Zr L_b4
2.201	0.0068 17	Zr L_b3
2.219	0.00121 20	Zr L_b2
2.304	0.0031 5	Zr L_g1
2.503	0.00066 17	Zr L_g2
2.503	0.0013 3	Zr L_g3
15.466	3.02E-05 17	Zr K_a3
15.691	2.00 11	Zr K_a2
15.775	3.83 20	Zr K_a1
17.653	0.297 16	Zr K_b3
17.667	0.57 3	Zr K_b1
17.816	0.00257 16	Zr K_b5
17.969	0.117 6	Zr K_b2
17.995	0.0245 15	Zr K_b4

Betas from ⁹⁹Y (1.470 s 7)
Eb endpoint (keV)	Ib (%)	Decay mode

4067	1.9	b^-
5119.4	1.6 5	b^-
5166.9	3.1 6	b^-
5488.2	0.9 3	b^-
5732.4	1.5 4	b^-
5850.9	0.9 2	b^-
5979.4	4.2 7	b^-
6134.6	0.4 1	b^-
6336.3	0.5 1	b^-
6413.1	0.9 2	b^-
6420.9	0.7 1	b^-
6488.1	2.5 4	b^-
6502.5	5.5 6	b^-
6516	2.1 6	b^-
6543.8	0.5 2	b^-
6561.9	3.6 4	b^-
6593.8	0.8 2	b^-
6608.7	1.5 2	b^-
6682.1	1.7 7	b^-
6715.1	9.3 9	b^-
6716.6	1.2 2	b^-
6775.7	0.2 1	b^-
6785	3.4 6	b^-
6805.5	2.6 7	b^-
6812	0.09 5	b^-
6842.7	25 3	b^-
6899.6	3.7 8	b^-
6909.2	8 3	b^-
6952.8	2.4 10	b^-
6991.5	4.4 14	b^-
7315.04	0.7 11	b^-
7445.24	7 4	b^-

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