It's Elemental
Isotopes of the Element Calcium
Calcium
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 Number | Natural Abundance | Half-life |
| 40 | 96.94% | > 3.0×10+21 years |
| 42 | 0.647% | STABLE |
| 43 | 0.135% | STABLE |
| 44 | 2.09% | STABLE |
| 46 | 0.004% | > 0.28×10+16 years |
| 48 | 0.187% | > 5.8×1022 years |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 34 | < 35 nanoseconds | Proton Emission | No Data Available |
| 35 | 25.7 milliseconds | Electron Capture with delayed Proton Emission | 95.90% |
| Electron Capture with delayed Double Proton Emission | 4.10% | ||
| Electron Capture | 100.00% | ||
| 36 | 102 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 54.30% | ||
| 37 | 181.1 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 82.10% | ||
| 38 | 440 milliseconds | Electron Capture | 100.00% |
| 39 | 859.6 milliseconds | Electron Capture | 100.00% |
| 40 | > 3.0×10+21 years | Double Electron Capture | No Data Available |
| 41 | 1.02×10+5 years | Electron Capture | 100.00% |
| 42 | STABLE | - | - |
| 43 | STABLE | - | - |
| 44 | STABLE | - | - |
| 45 | 162.61 days | Beta-minus Decay | 100.00% |
| 46 | > 0.28×10+16 years | Double Beta-minus Decay | No Data Available |
| 47 | 4.536 days | Beta-minus Decay | 100.00% |
| 48 | > 5.8×1022 years | Double Beta-minus Decay | 75.00% |
| 49 | 8.718 minutes | Beta-minus Decay | 100.00% |
| 50 | 13.9 seconds | Beta-minus Decay | 100.00% |
| 51 | 10.0 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 52 | 4.6 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | <= 2.00% | ||
| 53 | 90 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | > 30.00% | ||
| 54 | 86 milliseconds | Beta-minus Decay | 100.00% |
| 55 | 22 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 56 | 11 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission (suspected) | No Data Available | ||
| 57 | > 620 nanoseconds | Beta-minus Decay with delayed Double Neutron Emission | No Data Available |
| Beta-minus Decay | No Data Available | ||
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 58 | > 620 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.