Protactinium Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

212Pa

212.023204 (80)

 

8

ms

21,615 (75)

7,633.5 (3.5)

A

100

213Pa

213.021109 (76)

 

7

ms

19,663 (71)

7,644.8 (3.3)

A

100

214Pa

214.020918 (82)

 

17

ms

19,485 (76)

7,647.6 (3.6)

A

100

215Pa

215.019186 (93)

 

14

ms

17,872 (87)

7,657.1 (4)

A

100

216Pa

216.019110 (75)

 

105

ms

17,800 (70)

7,659.3 (3.2)

A

?

217Pa

217.018324 (56)

 

3.48

ms

17,069 (52)

7,664.6 (2.4)

A

100

218Pa

218.020042 (26)

 

113

us

18,669 (25)

7,659.1 (1.1)

A

100

219Pa

219.019883 (58)

 

53

ns

18,521 (54)

7,661.7 (2.5)

A

100

220Pa

220.021875 (61)

 

780

ns

20,377 (57)

7,655.1 (2.6)

A

100

221Pa

221.021878 (55)

 

5.9

us

20,379 (52)

7,657.0 (2.3)

A

100

222Pa

222.023742 (78)

 

3.2

ms

22,116 (73)

7,651 (0)

A

100

223Pa

223.023962 (76)

 

5.1

ms

22,321 (71)

7,652.0 (3.2)

A

100

224Pa

224.025626 (17)

 

844

ms

23,870 (16)

7,646.93 (6.9)

A~100

 

225Pa

225.026131 (76)

 

1.7

s

24,341 (71)

7,646.7 (3.2)

A

100

226Pa

226.027948 (12)

 

1.8

m

26,033 (11)

7,641.11 (5.1)

A

74 5

227Pa

227.0288051 (80)

 

38.3

m

26,831.8 (7.5)

7,639.49 (3.3)

A

85 2

228Pa

228.0310514 (47)

 

22

h

28,924.2 (4.4)

7,632.20 (1.9)

B+

98.0 2

229Pa

229.0320968 (30)

 

1.5

d

29,898.0 (2.7)

7,629.87 (1.2)

EC~100

 

230Pa

230.0345408 (35)

 

17.4

d

32,174.5 (3.3)

7,621.89 (1.4)

B+

91.6 13

231Pa

231.0358840 (24)

 

32.76

ky

33,425.7 (2.3)

7,618.42 (1)

A

232Pa

232.0385916 (83)

 

1.31

d

35,947.8 (7.7)

7,609.50 (3.3)

B-~100

 

233Pa

233.0402473 (23)

 

26.967

d

37,490.1 (2.2)

7,604.864 (9)

B-

100

234Pa

234.0433081 (51)

 

6.7

h

40,341.2 (4.7)

7,594.67 (2)

B-

100

235Pa

235.045444 (54)

 

24.44

m

42,330 (50)

7,588.2 (2.1)

B-

100

236Pa

236.04868 (21)

 

9.1

m

45,350 (200)

7,577.5 (8.5)

B-

100

237Pa

237.05115 (11)

 

8.7

m

47,640 (100)

7,569.9 (4.2)

B-

100

238Pa

238.054503 (64)

 

2.27

m

50,769 (60)

7,558.9 (2.5)

B-

100

239Pa

239.05726 (21)

 

1.8

h

53,340 (200)

7,550 (1)

B-

100

240Pa

240.06098 (32)

 

2

m

56,800 (300)

7,538 (1)

B- ?

 

217mPa

217.018324 (56)

 

1.08

ms

17,069 (52)

7,664.6 (2.4)

A

73 4

229mPa

229.0320968 (30)

 

420

ns

29,898.0 (2.7)

7,629.87 (1.2)

IT

100

234mPa

234.0433081 (51)

 

1.17

m

40,341.2 (4.7)

7,594.67 (2)

B-~100

 

Data Source: ENSDF March 2005

Radiochemistry Society 2005