錒的同位素

錒沒有穩定同位素。它最穩定的同位素是半衰期21.772年的227Ac。

**圖表**
203Ac
89
114

u=μs
α
199Fr
(1/2+)
204Ac
89
115
u=ms
α
200Fr
205Ac
89
116
u=ms
α
201Fr
9/2−?
206Ac
89
117
206.01450(8)
25(7) ms
α
202Fr
(3+)
206m1Ac
80(50) keV
15(6) ms
α
202Fr
206m2Ac
290(110)# keV
41(16) ms
α
202mFr
(10−)
207Ac
89
118
207.01195(6)
31(8) ms27(+11−6) ms
α
203Fr
9/2−#
208Ac
89
119
208.01155(6)
97(16) ms95(+24−16) ms
α (99%)
204Fr
(3+)
β+ (1%)
208Ra
208mAc
506(26) keV
28(7) ms25(+9−5) ms
α (89%)
204Fr
(10−)
IT (10%)
208Ac
β+ (1%)
208Ra
209Ac
89
120
209.00949(5)
92(11) ms
α (99%)
205Fr
(9/2−)
β+ (1%)
209Ra
210Ac
89
121
210.00944(6)
350(40) ms
α (96%)
206Fr
7+#
β+ (4%)
210Ra
211Ac
89
122
211.00773(8)
213(25) ms
α (99.8%)
207Fr
9/2−#

β+ (.2%)
211Ra
212Ac
89
123
212.00781(7)
920(50) ms
α (97%)
208Fr
6+#
β+ (3%)
212Ra
213Ac
89
124
213.00661(6)
731(17) ms
α
209Fr
(9/2−)#
β+ （不常見）
213Ra
214Ac
89
125
214.006902(24)
8.2(2) s
α (89%)
210Fr
(5+)#
β+ (11%)
214Ra
215Ac
89
126
215.006454(23)
0.17(1) s
α (99.91%)
211Fr
9/2−
β+ (.09%)
215Ra
216Ac
89
127
216.008720(29)
0.440(16) ms
α
212Fr
(1−)
β+ (7×10−5%)
216Ra
216mAc
44(7) keV
443(7) µs
(9−)
217Ac
89
128
217.009347(14)
69(4) ns
α (98%)
213Fr
9/2−
β+ (2%)
217Ra
217mAc
2012(20) keV
740(40) ns
(29/2)+
218Ac
89
129
218.01164(5)
1.08(9) µs
α
214Fr
(1−)#
218mAc
584(50)# keV
103(11) ns
(11+)
219Ac
89
130
219.01242(5)
11.8(15) µs
α
215Fr
9/2−
β+ (10−6%)
219Ra
220Ac
89
131
220.014763(16)
26.36(19) ms
α
216Fr
(3−)
β+ (5×10−4%)
220Ra
221Ac
89
132
221.01559(5)
52(2) ms
α
217Fr
9/2−#
222Ac
89
133
222.017844(6)
5.0(5) s
α (99%)
218Fr
1−
β+ (1%)
222Ra
222mAc
200(150)# keV
1.05(7) min
α (88.6%)
218Fr
high
IT (10%)
222Ac
β+ (1.4%)
222Ra
223Ac
89
134
223.019137(8)
2.10(5) min
α (99%)
219Fr
(5/2−)
EC (1%)
223Ra
CD (3.2×10−9%)
鉍|209link=yes
224Ac
89
135
224.021723(4)
2.78(17) h
β+ (90.9%)
224Ra
0−
α (9.1%)
220Fr
β- (1.6%)
224Th
225Ac
89
136
225.023230(5)
10.0(1) d
α
221Fr
(3/2−)
CD (6×10−10%)
211link=yes
226Ac
89
137
226.026098(4)
29.37(12) h
β- (83%)
226Th
(1)(−#)
EC (17%)
226Ra
α (.006%)
222Fr
227Ac
Actinium
89
138
227.0277521(26)
21.772(3) y
β- (98.61%)
227Th
3/2−
Trace
α (1.38%)
223Fr
228Ac
Mesothorium 2
89
139
228.0310211(27)
6.13(2) h
β-
228Th
3+
Trace
229Ac
89
140
229.03302(4)
62.7(5) min
β-
229Th
(3/2+)
230Ac
89
141
230.03629(32)
122(3) s
β-
230Th
(1+)
231Ac
89
142
231.03856(11)
7.5(1) min
β-
231Th
(1/2+)
232Ac
89
143
232.04203(11)
119(5) s
β-
232Th
(1+)
233Ac
89
144
233.04455(32)#
145(10) s
β-
233Th
(1/2+)
234Ac
89
145
234.04842(43)#
44(7) s
β-
234Th
235Ac
89
146
235.05123(38)#
40# s
β-
235Th
1/2+#
236Ac
89
147
236.05530(54)#
2# min
β-
236Th

**參考文獻**
 Isotope masses from  Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
** Audi, Bersillon, Blachot, Wapstra.  The Nubase2003 evaluation of nuclear and decay properties date=20110716114059 , Nuc. Phys. A 729, pp. 3-128 (2003).
** National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the  NuDat 2.1 database date=20171230031930  (retrieved Sept. 2005).
** David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.