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Isotopes of the Element Calcium

[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
4096.94%> 3.0×10+21 years
420.647%STABLE
430.135%STABLE
442.09%STABLE
460.004%> 0.28×10+16 years
480.187%> 5.8×1022 years

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
34< 35 nanosecondsProton EmissionNo Data Available
3525.7 millisecondsElectron Capture with
delayed Proton Emission
95.90%
Electron Capture with
delayed Double Proton Emission
4.10%
Electron Capture100.00%
36102 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
54.30%
37181.1 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
82.10%
38440 millisecondsElectron Capture100.00%
39859.6 millisecondsElectron Capture100.00%
40> 3.0×10+21 yearsDouble Electron CaptureNo Data Available
411.02×10+5 yearsElectron Capture100.00%
42STABLE--
43STABLE--
44STABLE--
45162.61 daysBeta-minus Decay100.00%
46> 0.28×10+16 yearsDouble Beta-minus DecayNo Data Available
474.536 daysBeta-minus Decay100.00%
48> 5.8×1022 yearsDouble Beta-minus Decay75.00%
498.718 minutesBeta-minus Decay100.00%
5013.9 secondsBeta-minus Decay100.00%
5110.0 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
No Data Available
524.6 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
<= 2.00%
5390 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
> 30.00%
5486 millisecondsBeta-minus Decay100.00%
5522 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
No Data Available
5611 millisecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission (suspected)  
No Data Available
57> 620 nanosecondsBeta-minus Decay with delayed
Double Neutron Emission
No Data Available
Beta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
58> 620 nanoseconds   Beta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available