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Isotopes of the Element Arsenic

[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
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 nanosecondsBeta-minus DecayNo Data Available
92No Data AvailableBeta-minus Decay100.00%