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Isotopes of the Element Arsenic

[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
75100%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
60No Data AvailableProton Emission (suspected)No Data Available
61No Data AvailableProton Emission (suspected)No Data Available
62No Data AvailableProton Emission (suspected)No Data Available
63< 43 nanosecondsProton EmissionNo Data Available
6418 millisecondsElectron Capture100.00%
65128 millisecondsElectron Capture100.00%
6695.77 millisecondsElectron Capture100.00%
6742.5 secondsElectron Capture100.00%
68151.6 secondsElectron Capture100.00%
6915.2 minutesElectron Capture100.00%
7052.6 minutesElectron Capture100.00%
7165.30 hoursElectron Capture100.00%
7226.0 hoursElectron Capture100.00%
7380.30 daysElectron Capture100.00%
7417.77 daysElectron Capture66.00%
Beta-minus Decay34.00%
75STABLE--
75m17.62 millisecondsIsomeric Transition100.00%
761.0942 daysBeta-minus Decay100.00%
7738.83 hoursBeta-minus Decay100.00%
7890.7 minutesBeta-minus Decay100.00%
799.01 minutesBeta-minus Decay100.00%
8015.2 secondsBeta-minus Decay100.00%
8133.3 secondsBeta-minus Decay100.00%
8219.1 secondsBeta-minus Decay100.00%
82m13.6 secondsBeta-minus Decay100.00%
8313.4 secondsBeta-minus Decay100.00%
844.2 secondsBeta-minus Decay with
delayed Neutron Emission
0.18%
Beta-minus Decay100.00%
852.021 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
59.40%
860.945 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
26.00%
870.56 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
15.40%
88> 300 nanosecondsBeta-minus Decay100.00%
89> 300 nanosecondsBeta-minus Decay (suspected)No Data Available
89m300 nanosecondsBeta-minus Decay with
delayed Neutron Emission (suspected)  
No Data Available
90> 300 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
91> 150 nanoseconds   Beta-minus DecayNo Data Available
92No Data AvailableBeta-minus Decay100.00%