Input interpretation
Pt-201 (platinum-201)
Decay properties
half-life | 150 seconds (142 to 158 s) mean lifetime | 220 seconds (206 to 227 s) decay constant | 0.00455 per second specific activity | 1.36×10^7 TBq/g (terabecquerels per gram) width | 3×10^-18 eV (electronvolts) decay modes | β^- (electron emission) final decay products | Hg-201 (100%)
Decay mode
decay mode | β^- (electron emission) Q-value | 2.66 MeV (megaelectronvolts) daughter nuclide | Au-201
Radiation shielding
lead | 1.88 mm portland concrete | 6.77 mm water | 13.3 mm air | 11.5 m
Decay chain
Decay chain
Mass properties
atomic number (Z) | 78 mass number (A) | 201 neutron number | 123 atomic mass | 200.974512868 u (unified atomic mass units) mass excess | -23.741111 MeV (megaelectronvolts) binding energy per nucleon | 7.885835 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 5/2^- (atomic fermion)
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 374.2 keV (kiloelectronvolts) | 9/2^- | (unknown) | (unknown) 1101.4 keV (kiloelectronvolts) | 13/2^- | (unknown) | (unknown) 1455.5 keV (kiloelectronvolts) | 15/2^+ | (unknown) | (unknown)