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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

Isotopes of Astatine (Z=85)