See also: List of individual Rubidium isotopes (and general data sources).
General data
Name of the isotope:Rubidium-82m; Rb-82mSymbol:82mRb or 82m37RbMass number A:82 (= number of nucleons)Atomic number Z:37 (= number of protons)Neutrons N:45Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.2162162162162 (= neutron-proton ratio)Neutron excess (N-Z):8Excitation energy:69.0(15) keVIsotopic mass:81.918209(3) u (atomic weight of Rubidium-82m)Nuclide mass:81.8979123 u (calculated nuclear mass without electrons)Mass excess:-76.18783 MeVMass defect:0.761238404 u (per nucleus)Nuclear binding energy:709.0890059 MeV (per nucleus) 8.6474269 MeV (average binding energy per nucleon)Half-life:6.472(6) hDecay constant λ:2.97498274859 × 10-5 s-1Specific activity α:2.18703083103 × 10+17 Bq g-1 5910894.1379243 Ci g-1Spin and parity: (nuclear angular momentum)5-Magnetic dipole moment:μ(μN) = +1.5100082(2)Quadrupole moment Q:+ 1.2(3) barn (100 fm2)Nuclear g-factor:gl = 0.30200164
Radioactive Decay
Half-life T½ = 6.472(6) h (hours) respectively 2.32992 × 104 seconds s.
Decay mode
Daughter
Probability
Decay energy
γ energy (intensity)
EC/β+
82Kr
> 99.67 %
4.473(15) MeV
Iso
82Rb
< 0.33 %
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 45) and isobaric (same nucleon number A = 82) with Rubidium-82m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
