Input interpretation
Zr-101 (zirconium-101)
Decay properties
half-life | 2.3 seconds (2.17 to 2.43 s) mean lifetime | 3.3 seconds (3.15 to 3.48 s) decay constant | 0.3 per second specific activity | 1.8×10^9 TBq/g (terabecquerels per gram) width | 2×10^-16 eV (electronvolts) decay modes | β^- (electron emission) final decay products | Ru-101 (100%)
Decay mode
decay mode | β^- (electron emission) Q-value | 5.485 MeV (megaelectronvolts) daughter nuclide | Nb-101
Radiation shielding
lead | 3.49 mm portland concrete | 14 mm water | 27.9 mm air | 23.5 m
Decay chain
Decay chain
Mass properties
atomic number (Z) | 40 mass number (A) | 101 neutron number | 61 atomic mass | 100.921140415 u (unified atomic mass units) mass excess | -73.457231 MeV (megaelectronvolts) binding energy per nucleon | 8.488776 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 3/2^+ (atomic fermion)
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 98.16 keV (kiloelectronvolts) | 5/2^+ | 6×10^-10 seconds | 8×10^-7 eV (electronvolts) 216.67 keV (kiloelectronvolts) | 5/2^- | 3.3×10^-10 seconds | 1.4×10^-6 eV (electronvolts) 231.8 keV (kiloelectronvolts) | 7/2^+ | 7×10^-11 seconds | 7×10^-6 eV (electronvolts) 321.11 keV (kiloelectronvolts) | 7/2^- | 2.7×10^-10 seconds | 1.7×10^-6 eV (electronvolts) 408.26 keV (kiloelectronvolts) | 9/2^+ | (unknown) | (unknown) 467.77 keV (kiloelectronvolts) | 9/2^- | (unknown) | (unknown) 610.58 keV (kiloelectronvolts) | 11/2^+ | (unknown) | (unknown) 619.86 keV (kiloelectronvolts) | 11/2^- | (unknown) | (unknown) 673.52 keV (kiloelectronvolts) | 3/2 or 5/2 (uncertain) | (unknown) | (unknown) 744.01 keV (kiloelectronvolts) | 3/2 or 5/2 (uncertain) | (unknown) | (unknown)