Selenium Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

65Se

64.96466 (64)

 

<50

ms

-32,920 (600)

8,169 (9)

B+

100

66Se

65.95521 (32)

 

33

ms

-41,720 (300)

8,300 (5)

B+

100

67Se

66.95009 (21)

 

133

ms

-46,490 (200)

8,368 (3)

B+

100

68Se

67.941798 (35)

 

35.5

s

-54,215 (33)

8,477.4 (4.8)

B+

100

69Se

68.939558 (37)

 

27.4

s

-56,302 (34)

8,501.8 (5)

B+

100

70Se

69.933391 (66)

 

41.1

m

-62,046 (62)

8,577.7 (8.8)

B+

100

71Se

70.932242 (34)

 

4.74

m

-63,116 (32)

8,585.6 (4.4)

B+

100

72Se

71.927112 (13)

 

8.4

d

-67,894 (12)

8,644.9 (1.7)

EC

100

73Se

72.926765 (11)

 

7.15

h

-68,218 (11)

8,641.4 (1.5)

B+

100

74Se

73.9224764 (18)

0.89 (4)

stable

 

-72,212.7 (1.7)

8,687.71 (2.3)

 

 

75Se

74.9225234 (18)

 

119.779

d

-72,169.0 (1.7)

8,678.91 (2.2)

EC

100

76Se

75.9192136 (18)

9.37 (29)

stable

 

-75,252.1 (1.7)

8,711.48 (2.2)

 

 

77Se

76.9199140 (18)

7.63 (16)

stable

 

-74,599.6 (1.7)

8,694.69 (2.1)

 

 

78Se

77.9173091 (18)

23.77 (28)

stable

 

-77,026.1 (1.7)

8,717.81 (2.1)

 

 

79Se

78.9184991 (18)

 

295

ky

-75,917.6 (1.7)

8,695.59 (2.1)

B-

100

80Se

79.9165213 (21)

49.61 (41)

stable

 

-77,759.9 (2)

8,710.82 (2.5)

 

 

81Se

80.9179925 (22)

 

18.45

m

-76,389.5 (2)

8,686.01 (2.5)

B-

100

82Se

81.9166994 (22)

8.73 (22)

97

Ey

-77,594.0 (2)

8,693.20 (2.5)

 

 

83Se

82.9191185 (39)

 

22.3

m

-75,340.7 (3.6)

8,658.56 (4.4)

B-

100

84Se

83.918462 (16)

 

3.1

m

-75,952 (15)

8,658.8 (1.7)

B-

100

85Se

84.922245 (32)

 

31.7

s

-72,428 (30)

8,610.5 (3.5)

B-

100

86Se

85.924272 (17)

 

15.3

s

-70,541 (16)

8,582.3 (1.8)

B-

100

87Se

86.928521 (42)

 

5.5

s

-66,582 (39)

8,530.9 (4.5)

B-

100

88Se

87.931424 (53)

 

1.53

s

-63,878 (49)

8,494.9 (5.6)

B-

100

89Se

88.93645 (32)

 

410

ms

-59,200 (300)

8,438 (3)

B-

100

90Se

89.93996 (43)

 

300

ms

-55,930 (400)

8,397 (4)

B- ?

 

91Se

90.94596 (54)

 

270

ms

-50,340 (500)

8,332 (6)

B-

100

92Se

91.94992 (64)

 

100

ms

-46,650 (600)

8,289 (6)

B- ?

 

93Se

92.95629 (86)

 

50

ms

-40,720 (800)

8,223 (9)

B- ?

 

94Se

93.96049 (86)

 

20

ms

-36,800 (800)

8,180 (9)

B- ?

 

69mSe

68.939558 (37)

 

2

us

-56,302 (34)

8,501.8 (5)

IT

100

71mSe

70.932242 (34)

 

5.6

us

-63,116 (32)

8,585.6 (4.4)

IT

100

73mSe

72.926765 (11)

 

39.8

m

-68,218 (11)

8,641.4 (1.5)

IT

72.6 3

77mSe

76.9199140 (18)

 

17.36

s

-74,599.6 (1.7)

8,694.69 (2.1)

IT

100

79mSe

78.9184991 (18)

 

3.92

m

-75,917.6 (1.7)

8,695.59 (2.1)

IT~100

 

81mSe

80.9179925 (22)

 

57.28

m

-76,389.5 (2)

8,686.01 (2.5)

IT~100

 

83mSe

82.9191185 (39)

 

70.1

s

-75,340.7 (3.6)

8,658.56 (4.4)

B-

100

69m1Se

68.939558 (37)

 

955

ns

-56,302 (34)

8,501.8 (5)

IT

100

71m1Se

70.932242 (34)

 

19

us

-63,116 (32)

8,585.6 (4.4)

IT

100

 

Data Source: ENSDF March 2005

©Radiochemistry Society 2005