Promethium Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

126Pm

125.95752 (54)

 

500

ms

-39,570 (500)

8,007 (4)

B+ ?

 

127Pm

126.95163 (64)

 

1

s

-45,060 (600)

8,050 (5)

B+ ?

 

128Pm

127.94842 (43)

 

1

s

-48,050 (400)

8,074 (3)

B+~100

 

129Pm

128.94316 (43)

 

3

s

-52,950 (400)

8,112 (3)

B+ ?

 

130Pm

129.94045 (32)

 

2.6

s

-55,470 (300)

8,131 (2)

B+

100

131Pm

130.93587 (21)

 

6.3

s

-59,740 (200)

8,163 (1)

B+

100

132Pm

131.93375 (21)

 

6.3

s

-61,710 (200)

8,177 (1)

B+

100

133Pm

132.929782 (54)

 

15

s

-65,408 (50)

8,204.3 (3.8)

B+

100

134Pm

133.928353 (62)

 

22

s

-66,739 (58)

8,213.2 (4.3)

B+

100

135Pm

134.924876 (63)

 

49

s

-69,978 (59)

8,236.2 (4.4)

B+

100

136Pm

135.923566 (84)

 

107

s

-71,198 (78)

8,243.9 (5.7)

B+

100

137Pm

136.920479 (14)

 

2

m

-74,073 (13)

8,263.65 (9.5)

B+ ?

 

138Pm

137.919548 (30)

 

10

s

-74,940 (27)

8,268.5 (2)

B+

100

139Pm

138.916804 (14)

 

4.15

m

-77,496 (13)

8,285.51 (9.7)

B+

100

140Pm

139.916042 (40)

 

9.2

s

-78,207 (37)

8,289.1 (2.6)

B+

100

141Pm

140.913555 (15)

 

20.9

m

-80,523 (14)

8,303.94 (9.9)

B+

100

142Pm

141.912874 (27)

 

40.5

s

-81,157 (25)

8,306.8 (1.8)

B+

100

143Pm

142.9109326 (36)

 

265

d

-82,965.7 (3.3)

8,317.77 (2.3)

EC

100

144Pm

143.9125908 (34)

 

363

d

-81,421.1 (3.2)

8,305.33 (2.2)

EC

100

145Pm

144.9127490 (34)

 

17.7

y

-81,273.8 (3.1)

8,302.70 (2.2)

EC

146Pm

145.9146963 (50)

 

5.53

y

-79,459.9 (4.7)

8,288.69 (3.2)

EC

66.0 13

147Pm

146.9151385 (26)

 

2.6234

y

-79,047.9 (2.4)

8,284.41 (1.6)

B-

100

148Pm

147.9174746 (65)

 

5.368

d

-76,871.9 (6.1)

8,268.27 (4.1)

B-

100

149Pm

148.9183342 (45)

 

53.08

h

-76,071.2 (4.2)

8,261.57 (2.8)

B-

100

150Pm

149.920984 (22)

 

2.68

h

-73,603 (20)

8,243.9 (1.3)

B-

100

151Pm

150.9212070 (57)

 

28.4

h

-73,395.2 (5.3)

8,241.33 (3.5)

B-

100

152Pm

151.923497 (28)

 

4.12

m

-71,262 (26)

8,226.2 (1.7)

B-

100

153Pm

152.924117 (12)

 

5.25

m

-70,685 (11)

8,221.39 (7.3)

B-

100

154Pm

153.926464 (48)

 

1.73

m

-68,498 (45)

8,206.2 (2.9)

B-

100

155Pm

154.928101 (32)

 

41.5

s

-66,973 (30)

8,195.5 (1.9)

B-

100

156Pm

155.931057 (37)

 

26.7

s

-64,220 (34)

8,177.1 (2.2)

B-

100

157Pm

156.93304 (12)

 

10.56

s

-62,370 (110)

8,164.6 (7.1)

B-

100

158Pm

157.93656 (14)

 

4.8

s

-59,090 (130)

8,143.3 (8)

B-

100

159Pm

158.93897 (21)

 

1.47

s

-56,850 (200)

8,129 (1)

B-

100

160Pm

159.94299 (32)

 

2

s

-53,100 (300)

8,105 (2)

B- ?

 

161Pm

160.94586 (54)

 

700

ms

-50,430 (500)

8,088 (3)

B- ?

 

162Pm

161.95029 (75)

 

500

ms

-46,310 (700)

8,063 (4)

B- ?

 

163Pm

162.95368 (86)

 

200

ms

-43,150 (800)

8,043 (5)

B- ?

 

133mPm

132.929782 (54)

 

10

s

-65,408 (50)

8,204.3 (3.8)

B+ ?

 

134mPm

133.928353 (62)

 

~5

s

-66,739 (58)

8,213.2 (4.3)

B+

100

135mPm

134.924876 (63)

 

40

s

-69,978 (59)

8,236.2 (4.4)

B+

100

136mPm

135.923566 (84)

 

47

s

-71,198 (78)

8,243.9 (5.7)

B+

100

137mPm

136.920479 (14)

 

2.4

m

-74,073 (13)

8,263.65 (9.5)

B+

100

138mPm

137.919548 (30)

 

3.24

m

-74,940 (27)

8,268.5 (2)

B+

100

139mPm

138.916804 (14)

 

180

ms

-77,496 (13)

8,285.51 (9.7)

IT~100

 

140mPm

139.916042 (40)

 

5.95

m

-78,207 (37)

8,289.1 (2.6)

B+

100

141mPm

140.913555 (15)

 

630

ns

-80,523 (14)

8,303.94 (9.9)

IT

100

142mPm

141.912874 (27)

 

2

ms

-81,157 (25)

8,306.8 (1.8)

IT

100

143mPm

142.9109326 (36)

 

24

ns

-82,965.7 (3.3)

8,317.77 (2.3)

IT

100

144mPm

143.9125908 (34)

 

780

ns

-81,421.1 (3.2)

8,305.33 (2.2)

IT

100

148mPm

147.9174746 (65)

 

41.29

d

-76,871.9 (6.1)

8,268.27 (4.1)

B-

95.8 6

149mPm

148.9183342 (45)

 

35

us

-76,071.2 (4.2)

8,261.57 (2.8)

0

 

152mPm

151.923497 (28)

 

7.52

m

-71,262 (26)

8,226.2 (1.7)

B-

100

154mPm

153.926464 (48)

 

2.68

m

-68,498 (45)

8,206.2 (2.9)

B-

100

138m1Pm

137.919548 (30)

 

3.24

m

-74,940 (27)

8,268.5 (2)

B+

100

144m1Pm

143.9125908 (34)

 

~2.7

us

-81,421.1 (3.2)

8,305.33 (2.2)

IT

100

152m1Pm

151.923497 (28)

 

13.8

m

-71,262 (26)

8,226.2 (1.7)

B-~100

 

Data Source: ENSDF March 2005

©Radiochemistry Society 2005