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Isotopes of Krypton (Z=36)
Click on an isotope to get more information about its decay
Isotope	Half-life	Spin Parity	Decay Mode(s) or Abundance
⁶⁹Kr
⁷⁰Kr		0+
⁷¹Kr	64 ms		%EC+%B+=100, %ECP=5.2 6
⁷²Kr	17.2 s	0+	%EC+%B+=100
⁷³Kr	27.0 s	5/2-	%EC+%B+=100, %ECP=0.68 12
⁷⁴Kr	11.50 m	0+	%EC+%B+=100
⁷⁵Kr	4.3 m	(5/2)+	%EC+%B+=100
⁷⁶Kr	14.8 h	0+	%EC+%B+=100
⁷⁷Kr	74.4 m	5/2+	%EC+%B+=100
⁷⁸Kr	stable	0+	%Abundance=0.35 2
⁷⁹Kr	35.04 h	1/2-	%EC+%B+=100
^79m1Kr	50 s	7/2+	%IT=100
⁸⁰Kr	stable	0+	%Abundance=2.25 2
⁸¹Kr	2.29e+5 y	7/2+	%EC=100
^81m1Kr	13.10 s	1/2-	%IT=99.9975 4, %EC=2.5E-3 4
⁸²Kr	stable	0+	%Abundance=11.6 1
⁸³Kr	stable	9/2+	%Abundance=11.5 1
^83m1Kr	1.83 h	1/2-	%IT=100
⁸⁴Kr	stable	0+	%Abundance=57.0 3
⁸⁵Kr	10.756 y	9/2+	%B-=100
^85m1Kr	4.480 h	1/2-	%IT=21.4 4, %B-=78.6 4
⁸⁶Kr	stable	0+	%Abundance=17.3 2
⁸⁷Kr	76.3 m	5/2+	%B-=100
⁸⁸Kr	2.84 h	0+	%B-=100
⁸⁹Kr	3.15 m	(3/2+,5/2+)	%B-=100
⁹⁰Kr	32.32 s	0+	%B-=100
⁹¹Kr	8.57 s	(5/2+)	%B-=100
⁹²Kr	1.840 s	0+	%B-=100, %B-N=0.033 3
⁹³Kr	1.286 s	(1/2+)	%B-=100, %B-N=1.95 11
⁹⁴Kr	0.20 s	0+	%B-=100, %B-N=5.7 22
⁹⁵Kr	0.78 s	1/2	%B-=100
⁹⁶Kr		0+
⁹⁷Kr		(3/2+)	%B-=?, %B-N=?
⁹⁸Kr		0+
⁹⁹Kr		(3/2+)	%B-=?
¹⁰⁰Kr		0+

Isotopes of Krypton (Z=36)