Input interpretation
Pb-197 | daughter nuclides
Result
Tl-197
Decay properties
half-life | 170 minutes (167.98 to 172.85 min) mean lifetime | 4.11 hours (4.0386 to 4.1558 h) decay constant | 6.76×10^-5 per second specific activity | 207000 TBq/g (terabecquerels per gram) width | 4.46×10^-20 eV (electronvolts) decay modes | β^+ (positron emission) final decay products | Au-197 (100%)
Decay mode
decay mode | β^+ (positron emission) Q-value | 2.5702 MeV (megaelectronvolts) daughter nuclide | Tl-197
decay mode | β^+ (positron emission) Q-value | 1.1776 MeV (megaelectronvolts) daughter nuclide | Hg-197
Decay chain
Decay chain
Mass properties
atomic number (Z) | 81 mass number (A) | 197 neutron number | 116 atomic mass | 196.969574511 u (unified atomic mass units) mass excess | -28.34116 MeV (megaelectronvolts) binding energy per nucleon | 7.893505 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 1/2^+ (atomic boson) magnetic moment | 1.58 μ_N
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 385.77 keV (kiloelectronvolts) | 3/2^+ | (unknown) | (unknown) 608.22 keV (kiloelectronvolts) | 9/2^- | 0.54 seconds | 8.4×10^-16 eV (electronvolts) 761.17 keV (kiloelectronvolts) | 5/2^+ | (unknown) | (unknown) 995.85 keV (kiloelectronvolts) | 11/2^- | (unknown) | (unknown) 1155.96 keV (kiloelectronvolts) | 3/2^+ | (unknown) | (unknown) 1257.38 keV (kiloelectronvolts) | 1/2^- or 3/2^- or 5/2^- (uncertain) | (unknown) | (unknown) 1281.81 keV (kiloelectronvolts) | 3/2^+ or 5/2^+ (uncertain) | (unknown) | (unknown) 1303.86 keV (kiloelectronvolts) | 13/2^- | (unknown) | (unknown) 1382.53 keV (kiloelectronvolts) | 11/2^- | (unknown) | (unknown) 1501.66 keV (kiloelectronvolts) | 9/2^- or 11/2^- (uncertain) | (unknown) | (unknown)