Input interpretation
He-6 (helium-6)
Decay properties
half-life | 806.7 ms (milliseconds) (805.06 to 808.34 ms) mean lifetime | 1.164 seconds (1.1616 to 1.166 s) decay constant | 0.8591 per second specific activity | 8.596×10^10 TBq/g (terabecquerels per gram) width | 5.656×10^-16 eV (electronvolts) decay modes | β^- (electron emission) | β^-d (electron + delayed deuteron) final decay products | Li-6 (100%) | He-4 (2.8×10^-6)
Decay modes
decay mode | β^- (electron emission) branching ratio | 100% Q-value | 3.508313 MeV (megaelectronvolts) daughter nuclide | Li-6 decay mode | β^-d (electron + delayed deuteron) branching ratio | 2.8×10^-6 daughter nuclide | He-4
Radiation shielding
lead | 2.41 mm portland concrete | 9 mm water | 17.8 mm air | 15.2 m
Decay chain
Decay chain
Mass properties
atomic number (Z) | 2 mass number (A) | 6 neutron number | 4 atomic mass | 6.018889124 u (unified atomic mass units) mass excess | 17.595106 MeV (megaelectronvolts) binding energy per nucleon | 4.878017 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 1797 keV (kiloelectronvolts) | 2^+ | 4.04×10^-21 seconds | 113 keV (kiloelectronvolts) 5600 keV (kiloelectronvolts) | 0^+ or 1^- or 2^+ (uncertain) | 3.77×10^-23 seconds | 12.1 MeV (megaelectronvolts) 13900 keV (kiloelectronvolts) | 1^- or 2^- (uncertain) | 6.2×10^-23 seconds | 7.4 MeV (megaelectronvolts) 15500 keV (kiloelectronvolts) | (unknown) | 1×10^-22 seconds | 4 MeV (megaelectronvolts) 24200 keV (kiloelectronvolts) | (unknown) | 4.19×10^-23 seconds | 10.9 MeV (megaelectronvolts) 32000 keV (kiloelectronvolts) | (unknown) | 2×10^-22 seconds | 2 MeV (megaelectronvolts) 36000 keV (kiloelectronvolts) | (unknown) | 2×10^-22 seconds | 2 MeV (megaelectronvolts)