Isotope

Isotopic Mass

amu

% Abundance

T_1/2

T_1/2

Units

Mass Excess

KeV

Binding Energy

Per Nucleon

KeV

Decay

Mode

Branching

Ratio

⁶⁰As

59.99313 (64)

-6,400 (600)

7,750 (10)

p ?

⁶¹As

60.98062 (64)

-18,050 (600)

7,940 (10)

p ?

⁶²As

61.97320 (32)

-24,960 (300)

8,058 (5)

p ?

⁶³As

62.96369 (54)

-33,820 (500)

8,198 (8)

p ?

⁶⁴As

63.95757 (38)

40

ms

-39,520 (360)

8,285 (6)

B+

100

⁶⁵As

64.94956 (32)

170

ms

-46,980 (300)

8,397 (5)

B+

100

⁶⁶As

65.94471 (73)

95.77

ms

-51,500 (680)

8,460 (10)

B+

100

⁶⁷As

66.93919 (11)

42.5

s

-56,650 (100)

8,531 (1.5)

B+

100

⁶⁸As

67.936769 (47)

151.6

s

-58,899 (43)

8,557.8 (6.4)

B+

100

⁶⁹As

68.932274 (34)

15.2

m

-63,087 (31)

8,611.5 (4.5)

B+

100

⁷⁰As

69.930925 (54)

52.6

m

-64,343 (50)

8,621.7 (7.1)

B+

100

⁷¹As

70.9271124 (45)

65.28

h

-67,894.3 (4.2)

8,663.95 (5.9)

B+

100

⁷²As

71.9267523 (47)

26

h

-68,229.8 (4.4)

8,660.38 (6.1)

B+

100

⁷³As

72.9238248 (42)

80.3

d

-70,956.7 (3.9)

8,689.66 (5.4)

EC

100

⁷⁴As

73.9239287 (25)

17.77

d

-70,860.0 (2.3)

8,680.00 (3.2)

B+

66 2

⁷⁵As

74.9215965 (20)

100

stable

-73,032.4 (1.8)

8,700.85 (2.4)

⁷⁶As

75.9223940 (20)

1.0778

d

-72,289.5 (1.8)

8,682.79 (2.4)

B-~100

⁷⁷As

76.9206473 (25)

38.83

h

-73,916.6 (2.3)

8,695.98 (3)

B-

100

⁷⁸As

77.921827 (11)

90.7

m

-72,817.4 (9.9)

8,673.9 (1.3)

B-

100

⁷⁹As

78.9209479 (60)

9.01

m

-73,636.5 (5.6)

8,676.62 (7.1)

B-

100

⁸⁰As

79.922534 (25)

15.2

s

-72,159 (23)

8,650.6 (2.9)

B-

100

⁸¹As

80.9221323 (59)

33.3

s

-72,533.3 (5.5)

8,648.06 (6.8)

B-

100

⁸²As

81.92450 (21)

19.1

s

-70,320 (200)

8,614 (2.4)

B-

100

⁸³As

82.92498 (24)

13.4

s

-69,880 (220)

8,602 (2.7)

B-

100

⁸⁴As

83.92906 (32)

4.02

s

-66,080 (300)

8,551 (4)

B-

100

⁸⁵As

84.93202 (21)

2.021

s

-63,320 (200)

8,513 (2)

B-

100

⁸⁶As

85.93650 (32)

945

ms

-59,150 (300)

8,459 (3)

B-

100

⁸⁷As

86.93990 (32)

610

ms

-55,980 (300)

8,418 (3)

B-

100

⁸⁸As

87.94494 (54)

300

ms

-51,290 (500)

8,361 (6)

B- ?

⁸⁹As

88.94939 (54)

200

ms

-47,140 (500)

8,311 (6)

B- ?

⁹⁰As

89.95550 (86)

80

ms

-41,450 (800)

8,245 (9)

B- ?

⁹¹As

90.96043 (97)

50

ms

-36,860 (900)

8,190 (10)

B- ?

⁹²As

91.96680 (97)

30

ms

-30,930 (900)

8,130 (10)

B- ?

^60mAs

59.99313 (64)

-6,400 (600)

7,750 (10)

p ?

^66mAs

65.94471 (73)

1.1

us

-51,500 (680)

8,460 (10)

IT

100

^68mAs

67.936769 (47)

111

s

-58,899 (43)

8,557.8 (6.4)

IT

100

^70mAs

69.930925 (54)

96

us

-64,343 (50)

8,621.7 (7.1)

IT

100

^75mAs

74.9215965 (20)

17.62

ms

-73,032.4 (1.8)

8,700.85 (2.4)

IT

100

^76mAs

75.9223940 (20)

1.84

us

-72,289.5 (1.8)

8,682.79 (2.4)

0

^77mAs

76.9206473 (25)

114

us

-73,916.6 (2.3)

8,695.98 (3)

IT

100

^79mAs

78.9209479 (60)

1.21

us

-73,636.5 (5.6)

8,676.62 (7.1)

IT

100

^82mAs

81.92450 (21)

13.6

s

-70,320 (200)

8,614 (2.4)

B-

100

^84mAs

83.92906 (32)

650

ms

-66,080 (300)

8,551 (4)

B-

100

^66m1As

65.94471 (73)

8.2

us

-51,500 (680)

8,460 (10)

IT

100