Francium Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

199Fr

199.007258 (45)

 

16

ms

6,761 (42)

7,695.3 (2.1)

A~100

 

200Fr

200.006572 (84)

 

24

ms

6,122 (78)

7,700.4 (3.9)

A

100

201Fr

201.003861 (77)

 

61

ms

3,596 (71)

7,714.8 (3.6)

A~100

 

202Fr

202.003373 (53)

 

290

ms

3,142 (49)

7,718.8 (2.4)

A

?

203Fr

203.000925 (17)

 

550

ms

861 (16)

7,731.78 (7.8)

A

?

204Fr

204.000653 (26)

 

1.7

s

608 (25)

7,734.7 (1.2)

A

96 2

205Fr

204.9985940 (84)

 

3.85

s

-1,309.7 (7.8)

7,745.69 (3.8)

A~100

 

206Fr

205.998666 (30)

 

~16

s

-1,243 (28)

7,746.9 (1.4)

B+

?

207Fr

206.996949 (54)

 

14.8

s

-2,842 (51)

7,756.2 (2.4)

A

95 2

208Fr

207.997139 (50)

 

59.1

s

-2,665 (47)

7,756.9 (2.2)

A

90 4

209Fr

208.995954 (16)

 

50

s

-3,769 (15)

7,763.69 (7)

A

89 3

210Fr

209.996408 (24)

 

3.18

m

-3,346 (22)

7,763.1 (1.1)

A

60 30

211Fr

210.995537 (23)

 

3.1

m

-4,158 (21)

7,768.4 (1)

A>80

 

212Fr

211.996202 (28)

 

20

m

-3,538 (26)

7,766.9 (1.2)

B+

57 2

213Fr

212.9961891 (82)

 

34.6

s

-3,549.8 (7.7)

7,768.43 (3.6)

A

99.45 3

214Fr

213.9989711 (94)

 

5

ms

-958.4 (8.8)

7,757.74 (4.1)

A

100

215Fr

215.0003415 (76)

 

86

ns

318.1 (7.1)

7,753.26 (3.3)

A

100

216Fr

216.003198 (15)

 

700

ns

2,979 (14)

7,742.41 (6.6)

A

100

217Fr

217.0046320 (70)

 

16.8

us

4,314.6 (6.5)

7,737.77 (3)

A

100

218Fr

218.0075783 (51)

 

1

ms

7,059.2 (4.8)

7,726.72 (2.2)

A

219Fr

219.0092521 (76)

 

20

ms

8,618.3 (7.1)

7,721.17 (3.2)

A

100

220Fr

220.0123274 (44)

 

27.4

s

11,482.9 (4.1)

7,709.74 (1.9)

A~100

 

221Fr

221.0142548 (51)

 

4.9

m

13,278.2 (4.8)

7,703.25 (2.2)

A~100

 

222Fr

222.017552 (23)

 

14.2

m

16,349 (21)

7,691.08 (9.6)

B-

100

223Fr

223.0197359 (26)

 

22

m

18,383.8 (2.4)

7,683.66 (1.1)

B-~100

 

224Fr

224.023250 (54)

 

3.33

m

21,657 (50)

7,670.8 (2.2)

B-

100

225Fr

225.025565 (32)

 

4

m

23,814 (30)

7,663.0 (1.3)

B-

100

226Fr

226.02939 (11)

 

49

s

27,370 (100)

7,649.0 (4.4)

B-

100

227Fr

227.03184 (11)

 

2.47

m

29,650 (100)

7,640.8 (4.4)

B-

100

228Fr

228.03573 (22)

 

38

s

33,280 (200)

7,627 (1)

B-

100

229Fr

229.038450 (40)

 

50.2

s

35,816 (37)

7,617.7 (1.6)

B-

100

230Fr

230.04251 (48)

 

19.1

s

39,600 (450)

7,603 (2)

B-

100

231Fr

231.04544 (50)

 

17.6

s

42,330 (470)

7,593 (2)

B-

100

232Fr

232.04977 (69)

 

5

s

46,360 (640)

7,578 (3)

B-

100

200mFr

200.006572 (84)

 

650

ms

6,122 (78)

7,700.4 (3.9)

A~100

 

202mFr

202.003373 (53)

 

340

ms

3,142 (49)

7,718.8 (2.4)

A

?

204mFr

204.000653 (26)

 

2.6

s

608 (25)

7,734.7 (1.2)

A

90 2

206mFr

205.998666 (30)

 

15.9

s

-1,243 (28)

7,746.9 (1.4)

A

42 24

214mFr

213.9989711 (94)

 

3.35

ms

-958.4 (8.8)

7,757.74 (4.1)

A

100

218mFr

218.0075783 (51)

 

22

ms

7,059.2 (4.8)

7,726.72 (2.2)

A~100

 

204m1Fr

204.000653 (26)

 

1.7

s

608 (25)

7,734.7 (1.2)

A

74 8

206m1Fr

205.998666 (30)

 

700

ms

-1,243 (28)

7,746.9 (1.4)

IT

?

218m1Fr

218.0075783 (51)

 

 

 

7,059.2 (4.8)

7,726.72 (2.2)

0

 

Data Source: ENSDF March 2005

©Radiochemistry Society 2005