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Isotopes of the Element Krypton

[Click for Main Data]         Proton Emission     Neutron Emission     Electron Emission     Positron Emission

Most of the isotope data on this site has been obtained from the National Nuclear Data Center.

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 years   Double 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