Input interpretation
Hg-177 (mercury-177)
Decay properties
half-life | 127.3 ms (milliseconds) (125.48 to 129.12 ms) mean lifetime | 183.7 ms (milliseconds) (181.04 to 186.27 ms) decay constant | 5.444 per second specific activity | 1.852×10^10 TBq/g (terabecquerels per gram) width | 3.584×10^-15 eV (electronvolts) decay modes | α (alpha emission) | β^+ (positron emission) final decay products | Tm-169 (70%) | Yb-173 (26%) | Ho-165 (8%) | Dy-161 (2×10^-4) | Gd-157 (2×10^-7) | Eu-153 (5×10^-10) | Sm-149 (4×10^-10) | Nd-145 (9×10^-11) | Pr-141 (3×10^-19) | Hf-177 (0)
Decay modes
decay mode | α (alpha emission) branching ratio | 85% Q-value | 6.7358 MeV (megaelectronvolts) daughter nuclide | Pt-173 decay mode | β^+ (positron emission) branching ratio | 15% Q-value | 7.7471 MeV (megaelectronvolts) daughter nuclide | Au-177
Decay chain
Decay chain
Mass properties
atomic number (Z) | 80 mass number (A) | 177 neutron number | 97 atomic mass | 176.986279158 u (unified atomic mass units) mass excess | -12.780882 MeV (megaelectronvolts) binding energy per nucleon | 7.789922 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 13/2^+ (atomic fermion)
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 638.3 keV (kiloelectronvolts) | 17/2^+ | (unknown) | (unknown) 1174.2 keV (kiloelectronvolts) | 21/2^+ | (unknown) | (unknown) 1795.5 keV (kiloelectronvolts) | 25/2^+ | (unknown) | (unknown)