Isotope

Isotopic Mass

amu

% Abundance

T_1/2

T_1/2

Units

Mass Excess

KeV

Binding Energy

Per Nucleon

KeV

Decay

Mode

Branching

Ratio

²⁰⁶Ac

206.014505 (76)

25

ms

13,511 (70)

7,667.7 (3.4)

A~100

²⁰⁷Ac

207.011950 (56)

31

ms

11,131 (52)

7,681.2 (2.5)

A

100

²⁰⁸Ac

208.011552 (60)

97

ms

10,760 (56)

7,684.8 (2.7)

A

?

²⁰⁹Ac

209.009495 (54)

92

ms

8,844 (51)

7,695.8 (2.4)

A

?

²¹⁰Ac

210.009436 (62)

350

ms

8,790 (57)

7,697.9 (2.7)

A

?

²¹¹Ac

211.007735 (76)

213

ms

7,205 (71)

7,707.2 (3.4)

A~100

²¹²Ac

212.007814 (73)

920

ms

7,279 (68)

7,708.5 (3.2)

A

?

²¹³Ac

213.006608 (56)

731

ms

6,155 (52)

7,715.5 (2.4)

A

?

²¹⁴Ac

214.006902 (24)

8.2

s

6,429 (22)

7,715.9 (1)

A GE 89 3

²¹⁵Ac

215.006454 (23)

170

ms

6,012 (21)

7,719.5 (1)

A~100

²¹⁶Ac

216.008720 (29)

440

us

8,123 (27)

7,711.4 (1.2)

A

100

²¹⁷Ac

217.009347 (14)

69

ns

8,707 (13)

7,710.32 (5.9)

A

?

²¹⁸Ac

218.011641 (54)

1.08

us

10,844 (51)

7,702.2 (2.3)

A

100

²¹⁹Ac

219.012420 (54)

11.8

us

11,570 (50)

7,700.5 (2.3)

A

100

²²⁰Ac

220.014763 (16)

26.36

ms

13,752 (15)

7,692.32 (6.8)

A

100

²²¹Ac

221.015591 (54)

52

ms

14,523 (50)

7,690.5 (2.3)

A

100

²²²Ac

222.0178439 (56)

5

s

16,621.4 (5.2)

7,682.80 (2.3)

A

99 1

²²³Ac

223.0191375 (77)

2.1

m

17,826.4 (7.2)

7,679.14 (3.2)

A

99

²²⁴Ac

224.0217229 (45)

2.78

h

20,234.7 (4.2)

7,670.14 (1.9)

B+

90.6 17

²²⁵Ac

225.0232296 (50)

10

d

21,638.2 (4.7)

7,665.69 (2.1)

A

²²⁶Ac

226.0260981 (36)

29.37

h

24,310.2 (3.3)

7,655.66 (1.5)

B-

83 3

²²⁷Ac

227.0277521 (26)

21.772

y

25,850.9 (2.4)

7,650.70 (1.1)

B-

98.62 36

²²⁸Ac

228.0310211 (27)

6.15

h

28,896.0 (2.5)

7,639.19 (1.1)

B-

100

²²⁹Ac

229.033015 (36)

62.7

m

30,754 (33)

7,633.0 (1.5)

B-

100

²³⁰Ac

230.03629 (32)

122

s

33,810 (300)

7,622 (1.3)

B-

100

²³¹Ac

231.03856 (11)

7.5

m

35,920 (100)

7,614.4 (4.3)

B-

100

²³²Ac

232.04203 (11)

119

s

39,150 (100)

7,602.5 (4.3)

B-

100

²³³Ac

233.04455 (32)

145

s

41,500 (300)

7,594 (1)

B-

100

²³⁴Ac

234.04842 (43)

44

s

45,100 (400)

7,581 (2)

B-

100

²³⁵Ac

235.05123 (38)

40

s

47,720 (360)

7,572 (2)

B- ?

²³⁶Ac

236.05530 (54)

2

m

51,510 (500)

7,558 (2)

B- ?

^206mAc

206.014505 (76)

15

ms

13,511 (70)

7,667.7 (3.4)

A~100

^208mAc

208.011552 (60)

28

ms

10,760 (56)

7,684.8 (2.7)

A

?

^216mAc

216.008720 (29)

443

us

8,123 (27)

7,711.4 (1.2)

A

100

^217mAc

217.009347 (14)

740

ns

8,707 (13)

7,710.32 (5.9)

IT

95.7 10

^218mAc

218.011641 (54)

32

ns

10,844 (51)

7,702.2 (2.3)

0

^222mAc

222.0178439 (56)

1.05

m

16,621.4 (5.2)

7,682.80 (2.3)

A

?

^206m1Ac

206.014505 (76)

41

ms

13,511 (70)

7,667.7 (3.4)

A~100

^218m1Ac

218.011641 (54)

103

ns

10,844 (51)

7,702.2 (2.3)

0