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Isotopes of the Element Carbon

[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
1298.93%STABLE
131.07%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
81.981×10-21 seconds   Proton Emission100.00%
Alpha DecayNo Data Available
9126.5 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
61.60%
Electron Capture with
delayed Alpha Decay
38.40%
1019.308 secondsElectron Capture100.00%
1120.334 minutesElectron Capture100.00%
12STABLE--
13STABLE--
145700 yearsBeta-minus Decay100.00%
152.449 secondsBeta-minus Decay100.00%
160.747 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
99.00%
17193 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
32.00%
1892 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
31.50%
1949 millisecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
61.00%
2014 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
72.00%
2130 nanosecondsNeutron Emission (suspected)No Data Available
226.1 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
61.00%
Beta-minus Decay with delayed  
Double Neutron Emission
< 37.00%
23No Data AvailableNo Data AvailableNo Data Available