Isotopes of Astatine (Z=85)

Click on an isotope to get more information about its decay
Isotope Half-life Spin Parity Decay Mode(s) or Abundance
193At 40 ms %A=?
194At 40 ms %A=?
194m1At 250 ms %A=?
195At 0.63 s %A > 75, %EC+%B+ < 25
196At 0.253 s %A ~ 100
197At 0.35 s(9/2-) %A=96 4, %EC+%B+=4 4
197m1At 3.7 s(1/2+) %A=?, %EC+%B+=?
198At 4.2 s(3+) %A=90 10, %EC+%B+=10 10
198m1At 1.0 s(10-) %A=84 16, %EC+%B+=16 16
199At 7.2 s(9/2-) %A=90 5, %EC+%B+=10 5
200At 43 s (3+) %A=57 6, %EC+%B+=43 6
200m1At 47 s (7+) %A=43 7, %EC+%B+ < 57
200m2At 3.5 s (10-) %A ~ 10.5, %IT ~ 85, %EC ~ 4.5
201At 89 s (9/2-) %A=71 7, %EC+%B+=29 7
202At 184 s (2,3)+ %EC+%B+=82 3, %A=18 3
202m1At 182 s (7+) %EC+%B+=91.3, %A=8.7 15
202m2At 0.46 s (10-) %IT=99.7 2, %EC+%B+=0.25 sys %A=0.096 11
203At 7.4 m 9/2- %EC+%B+=69 3, %A=31 3
204At 9.2 m 7+ %EC+%B+=96.2 2 , %A=3.8 2
204m1At 108 ms (10-) %IT=100
205At 26.2 m 9/2- %EC+%B+=90 2, %A=10 2
206At 30.0 m (5)+ %EC+%B+=99.11 8, %A=0.89 8
207At 1.80 h 9/2- %EC+%B+=91.4 10, %A=8.6 10
208At 1.63 h 6+ %EC+%B+=99.45 6, %A=0.55 6
209At 5.41 h 9/2- %EC+%B+=95.9 5, %A=4.1 5
210At 8.1 h (5)+ %EC+%B+=99.825 20, %A=0.175 20
211At 7.214 h 9/2- %A=41.80 8, %EC=58.20 8
212At 0.314 s(1-) %A=100, %B- < 2E-6, %EC+%B+ < 3E-2
212m1At 0.119 s(9-) %A > 99, %IT < 1
213At 125 ns 9/2- %A=100
214At 558 ns 1- %A=100
214m1At 265 ns
214m2At 760 ns 9-
215At 0.10 ms 9/2- %A=100
216At 0.30 ms 1- %A=100, %EC<3E-7, %B-<6E-3
216m1At 0.1 ms (9-)
217At 32.3 ms 9/2- %A=99.988 4, %B-=0.012 4
218At 1.5 s %A=99.9 , %B-=0.1
219At 56 s %A ~ 97, %B- ~ 3
220At 3.71 m 3 %A=8 2, %B-=92 2
221At 2.3 m %B-=100
222At 54 s %B-=100
223At 50 s %B-=100, %A=0.008 sys
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8th Edition of the Table of Isotopes
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