Isotope

Isotopic Mass

amu

% Abundance

T_1/2

T_1/2

Units

Mass Excess

KeV

Binding Energy

Per Nucleon

KeV

Decay

Mode

Branching

Ratio

¹²¹Pr

120.95536 (75)

600

ms

-41,580 (700)

8,033 (6)

p

?

¹²²Pr

121.95181 (54)

500

ms

-44,890 (500)

8,061 (4)

B+ ?

¹²³Pr

122.94596 (64)

800

ms

-50,340 (600)

8,105 (5)

B+ ?

¹²⁴Pr

123.94296 (64)

1.2

s

-53,130 (600)

8,128 (5)

B+

100

¹²⁵Pr

124.93783 (43)

3.3

s

-57,910 (400)

8,165 (3)

B+

100

¹²⁶Pr

125.93531 (21)

3.12

s

-60,260 (200)

8,183 (2)

B+

100

¹²⁷Pr

126.93083 (21)

4.2

s

-64,430 (200)

8,215 (2)

B+

100

¹²⁸Pr

127.928791 (32)

2.84

s

-66,331 (30)

8,228.9 (2.3)

B+

100

¹²⁹Pr

128.925095 (32)

30

s

-69,774 (30)

8,254.4 (2.3)

B+

100

¹³⁰Pr

129.923590 (69)

40

s

-71,175 (64)

8,263.8 (4.9)

B+

100

¹³¹Pr

130.920259 (56)

1.5

m

-74,278 (52)

8,286.0 (4)

B+

100

¹³²Pr

131.919255 (61)

1.49

m

-75,213 (57)

8,291.4 (4.3)

B+

100

¹³³Pr

132.916331 (13)

6.5

m

-77,938 (12)

8,310.26 (9.4)

B+

100

¹³⁴Pr

133.915712 (38)

~11

m

-78,514 (35)

8,312.8 (2.6)

B+

100

¹³⁵Pr

134.913112 (13)

24

m

-80,936 (12)

8,328.93 (8.8)

B+

100

¹³⁶Pr

135.912692 (13)

13.1

m

-81,327 (12)

8,329.91 (9)

B+

100

¹³⁷Pr

136.910705 (13)

1.28

h

-83,177 (12)

8,341.53 (8.6)

B+

100

¹³⁸Pr

137.910755 (15)

1.45

m

-83,132 (14)

8,339.2 (1)

B+

100

¹³⁹Pr

138.9089384 (85)

4.41

h

-84,823.3 (7.9)

8,349.48 (5.7)

B+

100

¹⁴⁰Pr

139.9090759 (70)

3.39

m

-84,695.3 (6.5)

8,346.58 (4.6)

B+

¹⁴¹Pr

140.9076528 (26)

100

stable

-86,020.9 (2.5)

8,354.03 (1.8)

¹⁴²Pr

141.9100448 (26)

19.12

h

-83,792.7 (2.5)

8,336.35 (1.7)

B-~100

¹⁴³Pr

142.9108169 (28)

13.57

d

-83,073.5 (2.6)

8,329.46 (1.8)

B-

100

¹⁴⁴Pr

143.9133052 (36)

17.28

m

-80,755.6 (3.3)

8,311.58 (2.3)

B-

100

¹⁴⁵Pr

144.9145117 (80)

5.984

h

-79,631.8 (7.4)

8,302.17 (5.1)

B-

100

¹⁴⁶Pr

145.917644 (66)

24.15

m

-76,714 (62)

8,280.6 (4.2)

B-

100

¹⁴⁷Pr

146.918996 (25)

13.4

m

-75,455 (23)

8,270.6 (1.6)

B-

100

¹⁴⁸Pr

147.922135 (28)

2.29

m

-72,531 (26)

8,249.5 (1.8)

B-

100

¹⁴⁹Pr

148.923718 (88)

2.26

m

-71,057 (82)

8,238.4 (5.5)

B-

100

¹⁵⁰Pr

149.926673 (28)

6.19

s

-68,304 (26)

8,219.0 (1.8)

B-

100

¹⁵¹Pr

150.928319 (25)

18.9

s

-66,771 (23)

8,207.8 (1.5)

B-

100

¹⁵²Pr

151.93150 (13)

3.63

s

-63,810 (120)

8,187.4 (8.1)

B-

100

¹⁵³Pr

152.93384 (11)

4.28

s

-61,630 (100)

8,172.4 (6.8)

B-

100

¹⁵⁴Pr

153.93752 (16)

2.3

s

-58,200 (150)

8,149.5 (9.8)

B-

100

¹⁵⁵Pr

154.94012 (32)

1

s

-55,780 (300)

8,133 (2)

B- ?

¹⁵⁶Pr

155.94427 (43)

500

ms

-51,910 (400)

8,108 (3)

B- ?

¹⁵⁷Pr

156.94743 (43)

300

ms

-48,970 (400)

8,089 (3)

B- ?

¹⁵⁸Pr

157.95198 (64)

200

ms

-44,730 (600)

8,062 (4)

B- ?

¹⁵⁹Pr

158.95550 (75)

100

ms

-41,450 (700)

8,042 (4)

B- ?

^127mPr

126.93083 (21)

50

ms

-64,430 (200)

8,215 (2)

B+ ?

^129mPr

128.925095 (32)

1

ms

-69,774 (30)

8,254.4 (2.3)

IT

100

^130mPr

129.923590 (69)

10

s

-71,175 (64)

8,263.8 (4.9)

B+ ?

^131mPr

130.920259 (56)

5.7

s

-74,278 (52)

8,286.0 (4)

IT

96.4 12

^132mPr

131.919255 (61)

20

s

-75,213 (57)

8,291.4 (4.3)

B+ ?

^133mPr

132.916331 (13)

1.1

us

-77,938 (12)

8,310.26 (9.4)

IT

100

^134mPr

133.915712 (38)

17

m

-78,514 (35)

8,312.8 (2.6)

B+

100

^135mPr

134.913112 (13)

105

us

-80,936 (12)

8,328.93 (8.8)

IT

100

^136mPr

135.912692 (13)

91.7

ns

-81,327 (12)

8,329.91 (9)

IT

100

^137mPr

136.910705 (13)

2.66

us

-83,177 (12)

8,341.53 (8.6)

0

^138mPr

137.910755 (15)

2.12

h

-83,132 (14)

8,339.2 (1)

B+

100

^140mPr

139.9090759 (70)

3.05

us

-84,695.3 (6.5)

8,346.58 (4.6)

0

^142mPr

141.9100448 (26)

14.6

m

-83,792.7 (2.5)

8,336.35 (1.7)

IT

100

^144mPr

143.9133052 (36)

7.2

m

-80,755.6 (3.3)

8,311.58 (2.3)

IT~100

^148mPr

147.922135 (28)

2.01

m

-72,531 (26)

8,249.5 (1.8)

B-

100