Dysprosium Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

138Dy

137.96249 (64)

 

200

ms

-34,940 (600)

7,950 (4)

B+ ?

 

139Dy

138.95954 (54)

 

600

ms

-37,690 (500)

7,971 (4)

B+

100

140Dy

139.95401 (54)

 

700

ms

-42,840 (500)

8,008 (4)

B+ ?

 

141Dy

140.95135 (32)

 

900

ms

-45,320 (300)

8,027 (2)

B+

100

142Dy

141.94637 (39)

 

2.3

s

-49,960 (360)

8,060 (3)

B+

100

143Dy

142.94383 (21)

 

5.6

s

-52,320 (200)

8,076 (1)

B+

100

144Dy

143.939254 (33)

 

9.1

s

-56,585 (31)

8,105.7 (2.1)

B+

100

145Dy

144.937425 (49)

 

9.5

s

-58,288 (46)

8,117.2 (3.2)

B+

100

146Dy

145.932845 (29)

 

33.2

s

-62,554 (27)

8,146.1 (1.9)

B+

100

147Dy

146.931092 (21)

 

40

s

-64,188 (20)

8,156.7 (1.3)

B+

100

148Dy

147.927150 (11)

 

3.3

m

-67,859 (11)

8,180.94 (7.2)

B+

100

149Dy

148.9273048 (94)

 

4.2

m

-67,715.2 (8.8)

8,179.24 (5.9)

B+

100

150Dy

149.9255852 (53)

 

7.17

m

-69,317.0 (4.9)

8,189.20 (3.3)

B+

64 5

151Dy

150.9261846 (43)

 

17.9

m

-68,758.6 (4)

8,184.72 (2.7)

B+

?

152Dy

151.9247183 (56)

 

2.38

h

-70,124.5 (5.2)

8,192.96 (3.4)

EC~100

 

153Dy

152.9257647 (49)

 

6.4

h

-69,149.8 (4.5)

8,185.79 (3)

B+~100

 

154Dy

153.9244245 (82)

 

3

My

-70,398.2 (7.6)

8,193.16 (5)

A

100

155Dy

154.925754 (13)

 

9.9

h

-69,160 (12)

8,184.38 (7.7)

B+

100

156Dy

155.9242831 (71)

0.06 (1)

stable

 

-70,529.8 (6.6)

8,192.44 (4.2)

 

 

157Dy

156.9254661 (72)

 

8.14

h

-69,427.9 (6.7)

8,184.65 (4.2)

B+

158Dy

157.9244095 (36)

0.10 (1)

stable

 

-70,412.1 (3.4)

8,190.16 (2.2)

 

 

159Dy

158.9257392 (29)

 

144.4

d

-69,173.5 (2.7)

8,181.62 (1.7)

EC

100

160Dy

159.9251975 (27)

2.34 (8)

stable

 

-69,678.1 (2.5)

8,184.09 (1.6)

 

 

161Dy

160.9269334 (27)

18.91 (24)

stable

 

-68,061.1 (2.5)

8,173.34 (1.6)

 

 

162Dy

161.9267984 (27)

25.51 (26)

stable

 

-68,186.8 (2.5)

8,173.49 (1.6)

 

 

163Dy

162.9287312 (27)

24.90 (16)

stable

 

-66,386.5 (2.5)

8,161.82 (1.6)

 

 

164Dy

163.9291748 (27)

28.18 (37)

stable

 

-65,973.3 (2.5)

8,158.75 (1.5)

 

 

165Dy

164.9317033 (27)

 

2.334

h

-63,617.9 (2.5)

8,143.94 (1.5)

B-

100

166Dy

165.9328067 (28)

 

81.6

h

-62,590.1 (2.6)

8,137.31 (1.5)

B-

100

167Dy

166.935655 (65)

 

6.2

m

-59,937 (60)

8,121.0 (3.6)

B-

100

168Dy

167.93713 (15)

 

8.7

m

-58,560 (140)

8,112.6 (8.3)

B-

100

169Dy

168.94031 (32)

 

39

s

-55,600 (300)

8,095 (1.8)

B-

100

170Dy

169.94239 (21)

 

30

s

-53,660 (200)

8,083 (1)

B- ?

 

171Dy

170.94620 (32)

 

6

s

-50,110 (300)

8,062 (2)

B- ?

 

172Dy

171.94876 (43)

 

3

s

-47,730 (400)

8,049 (2)

B- ?

 

173Dy

172.95300 (54)

 

2

s

-43,780 (500)

8,026 (3)

B- ?

 

140mDy

139.95401 (54)

 

7

us

-42,840 (500)

8,008 (4)

B+ ?

 

143mDy

142.94383 (21)

 

3

s

-52,320 (200)

8,076 (1)

B+

100

145mDy

144.937425 (49)

 

14.1

s

-58,288 (46)

8,117.2 (3.2)

B+

100

146mDy

145.932845 (29)

 

150

ms

-62,554 (27)

8,146.1 (1.9)

IT

100

147mDy

146.931092 (21)

 

55

s

-64,188 (20)

8,156.7 (1.3)

B+

65 4

149mDy

148.9273048 (94)

 

490

ms

-67,715.2 (8.8)

8,179.24 (5.9)

IT

99.3 3

155mDy

154.925754 (13)

 

6

us

-69,160 (12)

8,184.38 (7.7)

IT

100

157mDy

156.9254661 (72)

 

21.6

ms

-69,427.9 (6.7)

8,184.65 (4.2)

IT

100

159mDy

158.9257392 (29)

 

122

us

-69,173.5 (2.7)

8,181.62 (1.7)

IT

100

165mDy

164.9317033 (27)

 

1.257

m

-63,617.9 (2.5)

8,143.94 (1.5)

IT

97.76 11

149m1Dy

148.9273048 (94)

 

28

ns

-67,715.2 (8.8)

8,179.24 (5.9)

IT

100

Data Source: ENSDF March 2005

©Radiochemistry Society 2005