Cobalt Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

47Co

47.01149 (54)

 

 

 

10,700 (500)

7,390 (11)

p ?

 

48Co

48.00176 (43)

 

 

 

1,640 (400)

7,597 (8)

p ?

 

49Co

48.98972 (28)

 

<35

ns

-9,580 (260)

7,836 (5)

p ?

 

50Co

49.98154 (18)

 

44

ms

-17,200 (170)

7,993 (3)

B+

100

51Co

50.97072 (16)

 

60

ms

-27,270 (150)

8,192 (3)

B+ ?

 

52Co

51.963590 (70)

 

115

ms

-33,916 (65)

8,317 (1)

B+

100

53Co

52.954219 (19)

 

242

ms

-42,645 (18)

8,477.4 (3.4)

B+

100

54Co

53.94845964 (77)

 

193.23

ms

-48,009.54 (72)

8,569.21 (1.3)

B+

100

55Co

54.94199903 (78)

 

17.53

h

-54,027.56 (73)

8,669.58 (1.3)

B+

100

56Co

55.9398393 (23)

 

77.23

d

-56,039.4 (2.1)

8,694.82 (3.8)

B+

100

57Co

56.93629137 (76)

 

271.74

d

-59,344.20 (71)

8,741.86 (1.3)

EC

100

58Co

57.9357528 (13)

 

70.86

d

-59,845.9 (1.2)

8,738.95 (2.2)

B+

100

59Co

58.93319505 (67)

100

stable

 

-62,228.41 (62)

8,768.01 (1.1)

 

 

60Co

59.93381706 (67)

 

5.2713

y

-61,649.01 (63)

8,746.75 (1)

B-

100

61Co

60.9324758 (10)

 

1.65

h

-62,898.42 (93)

8,756.15 (1.5)

B-

100

62Co

61.934051 (21)

 

1.5

m

-61,432 (20)

8,721.4 (3.2)

B-

100

63Co

62.933612 (21)

 

26.9

s

-61,840 (20)

8,717.6 (3.2)

B-

100

64Co

63.935810 (21)

 

300

ms

-59,793 (20)

8,675.5 (3.1)

B-

100

65Co

64.936478 (14)

 

1.2

s

-59,170 (13)

8,656.6 (2)

B-

100

66Co

65.93976 (27)

 

194

ms

-56,110 (250)

8,601 (3.8)

B-

100

67Co

66.94089 (34)

 

425

ms

-55,060 (320)

8,578 (4.8)

B-

100

68Co

67.94487 (34)

 

200

ms

-51,350 (320)

8,516 (4.7)

B-

100

69Co

68.94632 (36)

 

227

ms

-50,000 (340)

8,490 (4.9)

B-

100

70Co

69.95100 (90)

 

125

ms

-45,640 (840)

8,420 (12)

B-

100

71Co

70.95290 (90)

 

97

ms

-43,870 (840)

8,390 (12)

B-

100

72Co

71.95781 (64)

 

90

ms

-39,300 (600)

8,324 (8)

B-

100

73Co

72.96024 (75)

 

80

ms

-37,040 (700)

8,290 (10)

B- ?

 

74Co

73.96538 (86)

 

50

ms

-32,250 (800)

8,220 (11)

B- ?

 

75Co

74.96833 (86)

 

40

ms

-29,500 (800)

8,180 (11)

B- ?

 

52mCo

51.963590 (70)

 

104

ms

-33,916 (65)

8,317 (1)

B+

?

53mCo

52.954219 (19)

 

247

ms

-42,645 (18)

8,477.4 (3.4)

B+~98.5

 

54mCo

53.94845964 (77)

 

1.48

m

-48,009.54 (72)

8,569.21 (1.3)

B+

100

58mCo

57.9357528 (13)

 

9.04

h

-59,845.9 (1.2)

8,738.95 (2.2)

IT

100

60mCo

59.93381706 (67)

 

10.467

m

-61,649.01 (63)

8,746.75 (1)

IT~100

 

62mCo

61.934051 (21)

 

13.91

m

-61,432 (20)

8,721.4 (3.2)

B->99

 

66mCo

65.93976 (27)

 

1.21

us

-56,110 (250)

8,601 (3.8)

IT

100

68mCo

67.94487 (34)

 

1.6

s

-51,350 (320)

8,516 (4.7)

B-

?

70mCo

69.95100 (90)

 

500

ms

-45,640 (840)

8,420 (12)

B-~100

 

58m1Co

57.9357528 (13)

 

10.4

us

-59,845.9 (1.2)

8,738.95 (2.2)

IT

100

66m1Co

65.93976 (27)

 

>100

us

-56,110 (250)

8,601 (3.8)

IT

100

 

Data Source: ENSDF March 2005

©Radiochemistry Society 2005