Input interpretation
Cm-248 (curium-248)
Decay properties
half-life | 0.35 Myr (megayears) (0.3416 to 0.3547 Myr) mean lifetime | 0.501 Myr (megayears) (0.4931 to 0.5114 Myr) decay constant | 6.33×10^-14 per second specific activity | 154 MBq/g (megabecquerels per gram) width | 4.15×10^-29 eV (electronvolts) decay modes | α (alpha emission) | SF (spontaneous fission) | 2β^- (double beta decay) final decay products | Pb-208 (90%) | Pb-206 (3.7×10^-9%) | Pb-204 (0%) | Hg-200 (0%) | Hg-204 (0%)
Decay modes
decay mode | α (alpha emission) branching ratio | 91.61% Q-value | 5.16173 MeV (megaelectronvolts) daughter nuclide | Pu-244 decay mode | SF (spontaneous fission) branching ratio | 8.39% decay mode | 2β^- (double beta decay) Q-value | 152.44 keV (kiloelectronvolts) daughter nuclide | Cf-248
Decay chain
Decay chain
Mass properties
atomic number (Z) | 96 mass number (A) | 248 neutron number | 152 atomic mass | 248.072348508 u (unified atomic mass units) mass excess | 67.392202 MeV (megaelectronvolts) binding energy per nucleon | 7.496731 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 0^+ (atomic boson) magnetic moment | 0 μ_N
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 43.4 keV (kiloelectronvolts) | 2^+ | 1.24×10^-10 seconds | 3.68×10^-6 eV (electronvolts) 143.6 keV (kiloelectronvolts) | 4^+ | 7.8×10^-11 seconds | 5.8×10^-6 eV (electronvolts) 298.1 keV (kiloelectronvolts) | 6^+ | 3.3×10^-11 seconds | 1.4×10^-5 eV (electronvolts) 505 keV (kiloelectronvolts) | 8^+ | 1.32×10^-11 seconds | 3.46×10^-5 eV (electronvolts) 760.7 keV (kiloelectronvolts) | 10^+ | 9.4×10^-12 seconds | 4.9×10^-5 eV (electronvolts) 1049 keV (kiloelectronvolts) | 2^+ | 1.24×10^-12 seconds | 3.68×10^-4 eV (electronvolts) 1049 keV (kiloelectronvolts) | 1^- | (unknown) | (unknown) 1061.3 keV (kiloelectronvolts) | 12^+ | 3.9×10^-12 seconds | 1.2×10^-4 eV (electronvolts) 1084 keV (kiloelectronvolts) | 0^+ | (unknown) | (unknown) 1094 keV (kiloelectronvolts) | 3^- | (unknown) | (unknown)