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

Isotopes With A Known Natural Abundance


Mass NumberHalf-lifeDecay ModeBranching Percentage
194.0 picosecondsDouble Proton Emission100.00%
2090.8 millisecondsElectron Capture100.00%
Electron Capture withdelayed Proton Emission~ 27.00%
21122 millisecondsElectron Capture100.00%
Electron Capture withdelayed Proton Emission32.60%
Electron Capture withdelayed Alpha DecayElectron Capture100.00%
2311.317 secondsElectron Capture100.00%
24STABLE--
25STABLE--
26STABLE--
279.458 minutesBeta-minus Decay100.00%
2820.915 hoursBeta-minus Decay100.00%
291.30 secondsBeta-minus Decay100.00%
30335 millisecondsBeta-minus Decay100.00%
31232 millisecondsBeta-minus Decay withdelayed Neutron Emission1.70%
Beta-minus Decay100.00%
3286 millisecondsBeta-minus Decay100.00%
Beta-minus Decay withdelayed Neutron Emission5.50%
3390.5 millisecondsBeta-minus Decay100.00%
Beta-minus Decay withdelayed Neutron Emission14.00%
3420 millisecondsBeta-minus Decay100.00%
Beta-minus Decay withdelayed Neutron EmissionNo Data Available
3570 millisecondsBeta-minus Decay100.00%
Beta-minus Decay withdelayed Neutron Emission52.00%
363.9 millisecondsBeta-minus Decay100.00%
Beta-minus Decay withdelayed Neutron EmissionNo Data Available
37> 260 nanosecondsBeta-minus Decay100.00%
Beta-minus Decay withdelayed Neutron EmissionNo Data Available
38> 260 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay withdelayed Neutron EmissionNo Data Available
39Neutron EmissionNo Data Available
40> 170 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay withdelayed Neutron EmissionNo Data Available