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Isotopes of the Element Krypton

[Click for Main Data]

Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

Naturally Occurring Isotopes

Mass NumberNatural AbundanceHalf-life
780.355%>= 1.5×10+21 years
802.286%STABLE
8211.593%STABLE
8311.500%STABLE
8456.987%STABLE
8617.279%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
6932 millisecondsElectron Capture100.00%
7052 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
<= 1.30%
71100 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
2.10%
7217.1 secondsElectron Capture with
delayed Proton Emission
< 1.0×10-6 %
Electron Capture100.00%
7327.3 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
0.25%
7411.50 minutesElectron Capture100.00%
754.29 minutesElectron Capture100.00%
7614.8 hoursElectron Capture100.00%
7774.4 minutesElectron Capture100.00%
78>= 1.5×10+21 yearsDouble Electron CaptureNo Data Available
7935.04 hoursElectron Capture100.00%
79m50 secondsIsomeric Transition100.00%
80STABLE--
812.29×10+5 yearsElectron Capture100.00%
81m13.10 secondsIsomeric Transition100.00%
Electron Capture2.5×10-3 %
82STABLE--
83STABLE--
83m1.85 hoursIsomeric Transition100.00%
84STABLE--
8510.752 yearsBeta-minus Decay100.00%
85m4.480 hoursBeta-minus Decay78.60%
Isomeric Transition21.40%
86STABLE--
8776.3 minutesBeta-minus Decay100.00%
882.84 hoursBeta-minus Decay100.00%
893.15 minutesBeta-minus Decay100.00%
9032.32 secondsBeta-minus Decay100.00%
918.57 secondsBeta-minus Decay100.00%
921.840 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.03%
931.286 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
1.95%
94212 millisecondsBeta-minus Decay with
delayed Neutron Emission
1.11%
Beta-minus Decay100.00%
950.114 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
2.87%
9680 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
3.70%
9763 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
6.70%
9846 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
7.00%
9913 millisecondsBeta-minus Decay with
delayed Neutron Emission
11.00%
Beta-minus Decay100.00%
1007 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
No Data Available
101> 635 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
Beta-minus Decay with delayed
Double Neutron Emission
No Data Available