Tungsten Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

158W

157.97456 (54)

 

1.37

ms

-23,700 (500)

7,855 (3)

A

100

159W

158.97292 (43)

 

8.2

ms

-25,230 (400)

7,866 (3)

A

82 16

160W

159.96848 (22)

 

90

ms

-29,360 (210)

7,893 (1.3)

A

87 8

161W

160.96736 (21)

 

409

ms

-30,410 (200)

7,901 (1)

A

73 3

162W

161.963497 (19)

 

1.36

s

-34,002 (18)

7,923.8 (1.1)

B+ ?

 

163W

162.962524 (57)

 

2.8

s

-34,909 (53)

7,930.3 (3.2)

B+ ?

 

164W

163.958954 (13)

 

6.3

s

-38,234 (12)

7,951.44 (7.2)

B+

96.2 12

165W

164.958280 (27)

 

5.1

s

-38,862 (25)

7,956.0 (1.5)

B+~100

 

166W

165.955027 (11)

 

19.2

s

-41,892 (10)

7,974.92 (6.3)

B+~100

 

167W

166.954816 (21)

 

19.9

s

-42,089 (19)

7,976.7 (1.2)

B+

99.96 1

168W

167.951808 (17)

 

51

s

-44,890 (16)

7,993.92 (9.7)

B+~100

 

169W

168.951779 (17)

 

76

s

-44,918 (15)

7,994.54 (9.1)

B+

100

170W

169.949228 (16)

 

2.42

m

-47,293 (15)

8,008.96 (8.9)

B+~100

 

171W

170.949451 (30)

 

2.38

m

-47,086 (28)

8,008.1 (1.6)

B+

100

172W

171.947292 (30)

 

6.6

m

-49,097 (28)

8,020.2 (1.6)

B+

100

173W

172.947689 (30)

 

7.6

m

-48,727 (28)

8,018.3 (1.6)

B+

100

174W

173.946079 (30)

 

33.2

m

-50,227 (28)

8,027.3 (1.6)

B+

100

175W

174.946717 (30)

 

35.2

m

-49,633 (28)

8,024.1 (1.6)

B+

100

176W

175.945634 (30)

 

2.5

h

-50,642 (28)

8,030.1 (1.6)

EC

100

177W

176.946643 (30)

 

132

m

-49,702 (28)

8,025.0 (1.6)

B+

178W

177.945876 (16)

 

21.6

d

-50,416 (15)

8,029.31 (8.6)

EC

100

179W

178.947070 (17)

 

37.05

m

-49,304 (16)

8,023.33 (8.7)

B+

100

180W

179.9467045 (42)

0.12 (1)

stable

 

-49,644.5 (3.9)

8,025.49 (2.2)

 

 

181W

180.9481972 (51)

 

121.2

d

-48,254.0 (4.7)

8,018.06 (2.6)

EC

100

182W

181.94820416 (89)

26.50 (16)

stable

 

-48,247.52 (83)

8,018.316 (5)

 

 

183W

182.95022295 (88)

14.31 (4)

stable

 

-46,367.02 (82)

8,008.330 (5)

 

 

184W

183.95093119 (92)

30.64 (2)

stable

 

-45,707.30 (86)

8,005.087 (5)

 

 

185W

184.95341926 (97)

 

75.1

d

-43,389.68 (90)

7,992.917 (5)

B-

100

186W

185.9543641 (19)

28.43 (19)

stable

 

-42,509.5 (1.7)

7,988.607 (9)

 

 

187W

186.9571605 (19)

 

23.72

h

-39,904.8 (1.7)

7,975.120 (9)

B-

100

188W

187.9584891 (36)

 

69.78

d

-38,667.2 (3.3)

7,969.05 (1.8)

B-

100

189W

188.96191 (21)

 

11.6

m

-35,480 (200)

7,953 (1.1)

B-

100

190W

189.96318 (18)

 

30

m

-34,300 (160)

7,947.1 (8.7)

B-

100

191W

190.96660 (21)

 

20

s

-31,110 (200)

7,931 (1)

B- ?

 

192W

191.96817 (64)

 

10

s

-29,650 (600)

7,924 (3)

B- ?

 

158mW

157.97456 (54)

 

143

us

-23,700 (500)

7,855 (3)

A

100

179mW

178.947070 (17)

 

6.4

m

-49,304 (16)

8,023.33 (8.7)

IT~100

 

180mW

179.9467045 (42)

 

5.47

ms

-49,644.5 (3.9)

8,025.49 (2.2)

IT

100

183mW

182.95022295 (88)

 

5.2

s

-46,367.02 (82)

8,008.330 (5)

IT

100

185mW

184.95341926 (97)

 

1.597

m

-43,389.68 (90)

7,992.917 (5)

IT

100

186mW

185.9543641 (19)

 

18

us

-42,509.5 (1.7)

7,988.607 (9)

IT

100

190mW

189.96318 (18)

 

<3.1

ms

-34,300 (160)

7,947.1 (8.7)

IT

100

186m1W

185.9543641 (19)

 

>3

ms

-42,509.5 (1.7)

7,988.607 (9)

IT

100

Data Source: ENSDF March 2005

©Radiochemistry Society 2005