Osmium Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

164Ir

163.99220 (44)

 

1

ms

-7,270 (410)

7,748 (3)

p ?

 

165Ir

164.98752 (23)

 

<1

us

-11,630 (220)

7,777 (1)

p ?

 

166Ir

165.98582 (22)

 

10.5

ms

-13,210 (200)

7,788 (1)

A

93 3

167Ir

166.981665 (20)

 

35.2

ms

-17,079 (19)

7,812.9 (1.1)

A

48 6

168Ir

167.97988 (16)

 

161

ms

-18,740 (150)

7,824 (1)

A

82 14

169Ir

168.976295 (28)

 

780

ms

-22,081 (26)

7,845.5 (1.6)

A

50 18

170Ir

169.97497 (11)

 

910

ms

-23,320 (100)

7,854 (1)

B+ ?

 

171Ir

170.971626 (42)

 

3.6

s

-26,430 (40)

7,873.6 (2.3)

A~100

 

172Ir

171.97046 (11)

 

4.4

s

-27,520 (100)

7,881 (1)

B+

98

173Ir

172.967502 (15)

 

9

s

-30,272 (14)

7,898.09 (7.9)

B+>93

 

174Ir

173.966861 (30)

 

7.9

s

-30,869 (28)

7,902.5 (1.6)

B+

99.5 3

175Ir

174.964113 (21)

 

9

s

-33,429 (20)

7,918.1 (1.1)

B+

99.15 28

176Ir

175.963649 (22)

 

8.3

s

-33,861 (20)

7,921.4 (1.2)

B+

96.9 6

177Ir

176.961302 (21)

 

30

s

-36,047 (20)

7,934.6 (1.1)

B+~100

 

178Ir

177.961082 (21)

 

12

s

-36,252 (20)

7,936.5 (1.1)

B+

100

179Ir

178.959122 (12)

 

79

s

-38,077 (11)

7,947.50 (6.1)

B+

100

180Ir

179.959229 (23)

 

1.5

m

-37,978 (22)

7,947.6 (1.2)

B+

100

181Ir

180.957625 (28)

 

4.9

m

-39,472 (26)

7,956.6 (1.4)

B+

100

182Ir

181.958076 (23)

 

15

m

-39,052 (21)

7,954.9 (1.2)

B+

100

183Ir

182.956846 (27)

 

58

m

-40,197 (25)

7,961.8 (1.4)

B+~100

184Ir

183.957476 (30)

 

3.09

h

-39,611 (28)

7,959.2 (1.5)

B+

100

185Ir

184.956698 (30)

 

14.4

h

-40,336 (28)

7,963.7 (1.5)

B+

100

186Ir

185.957946 (18)

 

16.64

h

-39,173 (17)

7,958.05 (8.9)

B+

100

187Ir

186.9573634 (66)

 

10.5

h

-39,715.8 (6.2)

7,961.56 (3.3)

B+

100

188Ir

187.9588531 (75)

 

41.5

h

-38,328.1 (7)

7,954.76 (3.7)

B+

100

189Ir

188.958719 (14)

 

13.2

d

-38,453 (13)

7,956.04 (6.7)

EC

100

190Ir

189.9605460 (18)

 

11.78

d

-36,751.2 (1.7)

7,947.688 (9)

B+

100

191Ir

190.9605940 (18)

37.3 (2)

stable

 

-36,706.4 (1.7)

7,948.101 (9)

 

 

192Ir

191.9626050 (18)

 

73.827

d

-34,833.2 (1.7)

7,938.986 (9)

B-

95.13 14

193Ir

192.9629264 (18)

62.7 (2)

stable

 

-34,533.8 (1.7)

7,938.121 (9)

 

 

194Ir

193.9650784 (18)

 

19.28

h

-32,529.3 (1.7)

7,928.475 (9)

B-

100

195Ir

194.9659796 (18)

 

2.5

h

-31,689.8 (1.7)

7,924.902 (9)

B-

100

196Ir

195.968397 (41)

 

52

s

-29,438 (38)

7,914.2 (2)

B-

100

197Ir

196.969653 (22)

 

5.8

m

-28,268 (20)

7,909.0 (1)

B-

100

198Ir

197.97228 (21)

 

8

s

-25,820 (200)

7,897 (1)

B-

100

199Ir

198.973805 (44)

 

20

s

-24,401 (41)

7,891.2 (2.1)

B- ?

 

164mIr

163.99220 (44)

 

94

us

-7,270 (410)

7,748 (3)

p

?

165mIr

164.98752 (23)

 

300

us

-11,630 (220)

7,777 (1)

p

87 4

166mIr

165.98582 (22)

 

15.1

ms

-13,210 (200)

7,788 (1)

A

98.2 6

167mIr

166.981665 (20)

 

30

ms

-17,079 (19)

7,812.9 (1.1)

A

80 10

168mIr

167.97988 (16)

 

125

ms

-18,740 (150)

7,824 (1)

A

?

169mIr

168.976295 (28)

 

308

ms

-22,081 (26)

7,845.5 (1.6)

A

81 7

170mIr

169.97497 (11)

 

440

ms

-23,320 (100)

7,854 (1)

A

36 10

171mIr

170.971626 (42)

 

1.4

s

-26,430 (40)

7,873.6 (2.3)

A

58 11

172mIr

171.97046 (11)

 

2

s

-27,520 (100)

7,881 (1)

B+

77 3

173mIr

172.967502 (15)

 

2.2

s

-30,272 (14)

7,898.09 (7.9)

B+

88 1

174mIr

173.966861 (30)

 

4.9

s

-30,869 (28)

7,902.5 (1.6)

B+

97.5 3

184mIr

183.957476 (30)

 

470

us

-39,611 (28)

7,959.2 (1.5)

0

 

186mIr

185.957946 (18)

 

1.92

h

-39,173 (17)

7,958.05 (8.9)

B+~75

 

187mIr

186.9573634 (66)

 

30.3

ms

-39,715.8 (6.2)

7,961.56 (3.3)

IT

100

188mIr

187.9588531 (75)

 

4.2

ms

-38,328.1 (7)

7,954.76 (3.7)

IT~100

 

189mIr

188.958719 (14)

 

13.3

ms

-38,453 (13)

7,956.04 (6.7)

IT

100

190mIr

189.9605460 (18)

 

1.12

h

-36,751.2 (1.7)

7,947.688 (9)

IT

100

191mIr

190.9605940 (18)

 

4.94

s

-36,706.4 (1.7)

7,948.101 (9)

IT

100

192mIr

191.9626050 (18)

 

1.45

m

-34,833.2 (1.7)

7,938.986 (9)

IT~100

 

193mIr

192.9629264 (18)

 

10.53

d

-34,533.8 (1.7)

7,938.121 (9)

IT

100

194mIr

193.9650784 (18)

 

31.85

ms

-32,529.3 (1.7)

7,928.475 (9)

IT

100

195mIr

194.9659796 (18)

 

3.8

h

-31,689.8 (1.7)

7,924.902 (9)

B-

95 5

196mIr

195.968397 (41)

 

1.4

h

-29,438 (38)

7,914.2 (2)

B-~100

 

197mIr

196.969653 (22)

 

8.9

m

-28,268 (20)

7,909.0 (1)

B-~100

 

189m1Ir

188.958719 (14)

 

3.7

ms

-38,453 (13)

7,956.04 (6.7)

IT

100

190m1Ir

189.9605460 (18)

 

3.087

h

-36,751.2 (1.7)

7,947.688 (9)

B+

91.4 2

191m1Ir

190.9605940 (18)

 

5.5

s

-36,706.4 (1.7)

7,948.101 (9)

IT

100

192m1Ir

191.9626050 (18)

 

241

y

-34,833.2 (1.7)

7,938.986 (9)

IT

100

194m1Ir

193.9650784 (18)

 

171

d

-32,529.3 (1.7)

7,928.475 (9)

B-

100

175mIr

174.964113 (21)

 

 

 

-33,429 (20)

7,918.1 (1.1)

0

 

190m1Ir

189.9605460 (18)

 

>2

us

-36,751.2 (1.7)

7,947.688 (9)

IT

100

190m2Ir

189.9605460 (18)

 

90

ns

-36,751.2 (1.7)

7,947.688 (9)

IT

100

Data Source: ENSDF March 2005

©Radiochemistry Society 2005