Terbium Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

136Tb

135.96138 (64)

 

200

ms

-35,970 (600)

7,962 (4)

B+ ?

 

137Tb

136.95598 (64)

 

600

ms

-41,000 (600)

7,999 (4)

p ?

 

138Tb

137.95316 (43)

 

800

ms

-43,630 (400)

8,019 (3)

B+ ?

 

139Tb

138.94829 (32)

 

1.6

s

-48,170 (300)

8,052 (2)

B+

100

140Tb

139.94581 (86)

 

2.4

s

-50,480 (800)

8,069 (5.7)

B+

100

141Tb

140.94145 (11)

 

3.5

s

-54,540 (110)

8,097.5 (7.5)

B+

100

142Tb

141.93874 (32)

 

597

ms

-57,060 (300)

8,115 (2)

B+

100

143Tb

142.935121 (64)

 

12

s

-60,434 (60)

8,138.3 (4.2)

B+

100

144Tb

143.933045 (30)

 

~1

s

-62,368 (28)

8,151.3 (1.9)

B+

100

145Tb

144.929274 (61)

 

20

m

-65,881 (57)

8,175.0 (3.9)

B+ ?

 

146Tb

145.927247 (49)

 

8

s

-67,769 (45)

8,187.2 (3.1)

B+

100

147Tb

146.924045 (13)

 

1.64

h

-70,752 (12)

8,206.69 (8.1)

B+

100

148Tb

147.924272 (15)

 

60

m

-70,540 (14)

8,204.34 (9.4)

B+

100

149Tb

148.9232459 (46)

 

4.118

h

-71,496.0 (4.3)

8,209.86 (2.9)

B+

83.3 17

150Tb

149.9236597 (81)

 

3.48

h

-71,110.5 (7.6)

8,206.37 (5)

B+~100

 

151Tb

150.9231025 (49)

 

17.609

h

-71,629.5 (4.6)

8,208.91 (3)

B+~100

 

152Tb

151.924074 (43)

 

17.5

h

-70,724 (40)

8,202.1 (2.6)

B+

100

153Tb

152.9234346 (48)

 

2.34

d

-71,320.2 (4.5)

8,205.09 (2.9)

B+

100

154Tb

153.924678 (49)

 

21.5

h

-70,162 (45)

8,196.7 (3)

B+~100

 

155Tb

154.923505 (13)

 

5.32

d

-71,254 (12)

8,202.94 (7.8)

EC

156Tb

155.9247472 (47)

 

5.35

d

-70,097.5 (4.4)

8,194.68 (2.8)

B+~100

 

157Tb

156.9240246 (27)

 

71

y

-70,770.6 (2.5)

8,198.18 (1.6)

EC

100

158Tb

157.9254131 (28)

 

180

y

-69,477.2 (2.6)

8,189.20 (1.7)

B+

83.4 7

159Tb

158.9253468 (27)

100

stable

 

-69,539.0 (2.6)

8,188.84 (1.6)

 

 

160Tb

159.9271676 (27)

 

72.3

d

-67,842.9 (2.6)

8,177.51 (1.6)

B-

100

161Tb

160.9275699 (28)

 

6.906

d

-67,468.2 (2.6)

8,174.52 (1.6)

B-

100

162Tb

161.929488 (39)

 

7.6

m

-65,681 (36)

8,162.9 (2.2)

B-

100

163Tb

162.9306475 (51)

 

19.5

m

-64,601.4 (4.7)

8,155.67 (2.9)

B-

100

164Tb

163.93335 (11)

 

3

m

-62,080 (100)

8,139.8 (6.1)

B-

100

165Tb

164.93488 (21)

 

2.11

m

-60,660 (200)

8,131 (1)

B-

100

166Tb

165.93799 (11)

 

25.6

s

-57,760 (100)

8,112.9 (6)

B-

100

167Tb

166.94005 (43)

 

19

s

-55,840 (400)

8,101 (2)

B-

100

168Tb

167.94364 (54)

 

8.2

s

-52,500 (500)

8,081 (3)

B-

100

169Tb

168.94622 (64)

 

2

s

-50,100 (600)

8,067 (4)

B- ?

 

170Tb

169.95025 (75)

 

3

s

-46,340 (700)

8,045 (4)

B- ?

 

171Tb

170.95330 (86)

 

500

ms

-43,500 (800)

8,028 (5)

B- ?

 

141mTb

140.94145 (11)

 

7.9

s

-54,540 (110)

8,097.5 (7.5)

B+

100

142mTb

141.93874 (32)

 

303

ms

-57,060 (300)

8,115 (2)

IT~100

 

143mTb

142.935121 (64)

 

<21

s

-60,434 (60)

8,138.3 (4.2)

B+ ?

 

144mTb

143.933045 (30)

 

4.25

s

-62,368 (28)

8,151.3 (1.9)

IT

66

145mTb

144.929274 (61)

 

30.9

s

-65,881 (57)

8,175.0 (3.9)

B+

100

146mTb

145.927247 (49)

 

24.1

s

-67,769 (45)

8,187.2 (3.1)

B+

100

147mTb

146.924045 (13)

 

1.87

m

-70,752 (12)

8,206.69 (8.1)

B+

100

148mTb

147.924272 (15)

 

2.2

m

-70,540 (14)

8,204.34 (9.4)

B+

100

149mTb

148.9232459 (46)

 

4.16

m

-71,496.0 (4.3)

8,209.86 (2.9)

B+~100

 

150mTb

149.9236597 (81)

 

5.8

m

-71,110.5 (7.6)

8,206.37 (5)

B+~100

 

151mTb

150.9231025 (49)

 

25

s

-71,629.5 (4.6)

8,208.91 (3)

IT

93.8 4

152mTb

151.924074 (43)

 

4.2

m

-70,724 (40)

8,202.1 (2.6)

IT

78.8 8

153mTb

152.9234346 (48)

 

186

us

-71,320.2 (4.5)

8,205.09 (2.9)

IT

100

154mTb

153.924678 (49)

 

9.4

h

-70,162 (45)

8,196.7 (3)

B+

78.2 7

156mTb

155.9247472 (47)

 

24.4

h

-70,097.5 (4.4)

8,194.68 (2.8)

IT

100

158mTb

157.9254131 (28)

 

10.7

s

-69,477.2 (2.6)

8,189.20 (1.7)

IT~100

 

144m1Tb

143.933045 (30)

 

2.8

us

-62,368 (28)

8,151.3 (1.9)

IT

100

146m1Tb

145.927247 (49)

 

1.18

ms

-67,769 (45)

8,187.2 (3.1)

IT

100

148m1Tb

147.924272 (15)

 

1.31

us

-70,540 (14)

8,204.34 (9.4)

IT

100

154m1Tb

153.924678 (49)

 

22.7

h

-70,162 (45)

8,196.7 (3)

B+

98.2 6

156m1Tb

155.9247472 (47)

 

5.3

h

-70,097.5 (4.4)

8,194.68 (2.8)

IT

?

158m1Tb

157.9254131 (28)

 

395

us

-69,477.2 (2.6)

8,189.20 (1.7)

0

 

144m2Tb

143.933045 (30)

 

670

ns

-62,368 (28)

8,151.3 (1.9)

IT

100

Data Source: ENSDF March 2005

©Radiochemistry Society 2005