Iron Isotopic Data

 

 

 

Isotope

 

Isotopic Mass

amu

 

% Abundance

 

T1/2

 

T1/2

Units

 

Mass Excess

KeV

 

Binding Energy

Per Nucleon

KeV

 

Decay

Mode

 

Branching

Ratio

45Fe

45.01458 (24)

 

4.9

ms

13,580 (220)

7,318 (5)

2p

75 5

46Fe

46.00081 (38)

 

9

ms

760 (350)

7,613 (8)

B+

100

47Fe

46.99289 (28)

 

21.8

ms

-6,620 (260)

7,779 (6)

B+

100

48Fe

47.980504 (75)

 

44

ms

-18,160 (70)

8,026 (1)

B+

100

49Fe

48.97361 (16)

 

70

ms

-24,580 (150)

8,158 (3)

B+

100

50Fe

49.962989 (64)

 

155

ms

-34,476 (60)

8,354 (1.2)

B+

100

51Fe

50.956820 (16)

 

305

ms

-40,222 (15)

8,461.1 (2.9)

B+

100

52Fe

51.9481139 (70)

 

8.275

h

-48,331.6 (6.5)

8,609.6 (1.3)

B+

100

53Fe

52.9453079 (19)

 

8.51

m

-50,945.3 (1.8)

8,648.76 (3.3)

B+

100

54Fe

53.93961050 (74)

5.845 (35)

stable

 

-56,252.46 (69)

8,736.34 (1.3)

 

 

55Fe

54.93829336 (74)

 

2.737

y

-57,479.37 (69)

8,746.56 (1.2)

EC

100

56Fe

55.93493748 (74)

91.754 (36)

stable

 

-60,605.35 (68)

8,790.32 (1.2)

 

 

57Fe

56.93539397 (74)

2.119 (10)

stable

 

-60,180.13 (69)

8,770.25 (1.2)

 

 

58Fe

57.93327556 (76)

0.282 (4)

stable

 

-62,153.42 (70)

8,792.22 (1.2)

 

 

59Fe

58.93487546 (76)

 

44.495

d

-60,663.11 (71)

8,754.74 (1.2)

B-

100

60Fe

59.9340717 (37)

 

1.5

My

-61,411.8 (3.5)

8,755.83 (5.8)

B-

100

61Fe

60.936745 (21)

 

5.98

m

-58,921 (20)

8,703.8 (3.3)

B-

100

62Fe

61.936767 (16)

 

68

s

-58,901 (14)

8,693.2 (2.3)

B-

100

63Fe

62.94037 (18)

 

6.1

s

-55,550 (170)

8,630 (2.7)

B-

100

64Fe

63.94120 (30)

 

2

s

-54,770 (280)

8,609 (4.3)

B-

100

65Fe

64.94538 (26)

 

1.3

s

-50,880 (240)

8,541 (3.7)

B-

100

66Fe

65.94678 (32)

 

440

ms

-49,570 (300)

8,514 (4.6)

B-

100

67Fe

66.95095 (45)

 

394

ms

-45,690 (420)

8,450 (6.2)

B-

100

68Fe

67.95370 (75)

 

187

ms

-43,130 (700)

8,410 (10)

B-

100

69Fe

68.95878 (54)

 

109

ms

-38,400 (500)

8,333 (7)

B-

100

70Fe

69.96146 (64)

 

94

ms

-35,900 (600)

8,294 (9)

B-

100

71Fe

70.96672 (86)

 

30

ms

-31,000 (800)

8,220 (11)

B- ?

 

72Fe

71.96962 (86)

 

10

ms

-28,300 (800)

8,180 (11)

B- ?

 

47mFe

46.99289 (28)

 

 

 

-6,620 (260)

7,779 (6)

IT ?

 

52mFe

51.9481139 (70)

 

45.9

s

-48,331.6 (6.5)

8,609.6 (1.3)

B+~100

 

53mFe

52.9453079 (19)

 

2.526

m

-50,945.3 (1.8)

8,648.76 (3.3)

IT

100

54mFe

53.93961050 (74)

 

364

ns

-56,252.46 (69)

8,736.34 (1.3)

IT

100

61mFe

60.936745 (21)

 

250

ns

-58,921 (20)

8,703.8 (3.3)

IT

100

65mFe

64.94538 (26)

 

430

ns

-50,880 (240)

8,541 (3.7)

IT

100

67mFe

66.95095 (45)

 

64

us

-45,690 (420)

8,450 (6.2)

IT

100

 

Data Source: ENSDF March 2005

©Radiochemistry Society 2005