Input interpretation
K-55 | daughter nuclides
Result
Ca-55 | Ca-54
Decay properties
| Ca-55 | Ca-54 half-life | 30 ms (2.995×10^-7 to ∞ s) | 300 ns (2.97×10^-7 to ∞ s) mean lifetime | 43 ms (4.31×10^-7 to ∞ s) | 433 ns (4.28×10^-7 to ∞ s) decay constant | 23 per second | 2.31×10^6 per second specific activity | 2.5×10^11 TBq/g | 2.58×10^16 TBq/g width | 1.5×10^-14 eV | 1.05×10^-9 eV decay modes | β^- (electron emission) | β^- (electron emission) | β^-n (electron + delayed neutron) final decay products | Cr-54 (0%) | Mn-55 (0%) | Cr-52 (0%) | Cr-53 (0%) | Cr-54 (0%)
Decay modes
decay mode | β^- (electron emission) Q-value | 17.85 MeV (megaelectronvolts) daughter nuclide | Ca-55 decay mode | β^-n (electron + delayed neutron) Q-value | 15.55 MeV (megaelectronvolts) daughter nuclide | Ca-54
Ca-55
decay mode | β^- (electron emission) Q-value | 11.46 MeV (megaelectronvolts) daughter nuclide | Sc-55
Ca-54
decay mode | β^- (electron emission) Q-value | 10.326 MeV (megaelectronvolts) daughter nuclide | Sc-54 decay mode | β^-n (electron + delayed neutron) Q-value | 5.659 MeV (megaelectronvolts) daughter nuclide | Sc-53
Radiation shielding
Radiation shielding
Decay chain
Ca-55
Decay chain Ca-55
Ca-54
Decay chain Ca-54
Mass properties
| Ca-55 | Ca-54 atomic number (Z) | 20 | 20 mass number (A) | 55 | 54 neutron number | 35 | 34 atomic mass | 54.98055 u (unified atomic mass units) | 53.97435 u (unified atomic mass units) mass excess | -18.118 MeV (megaelectronvolts) | -23.893 MeV (megaelectronvolts) binding energy per nucleon | 8.116 MeV (megaelectronvolts) | 8.224 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Ca-55 | Ca-54 spin parity J^π | 5/2^- (atomic fermion) | 0^+ (atomic boson) magnetic moment | (unknown) | 0 μ_N
Quantum properties