See also: List of individual Selenium isotopes (and general data sources).
General data
Name of the isotope:Selenium-83; Se-83Symbol:83Se or 8334SeMass number A:83 (= number of nucleons)Atomic number Z:34 (= number of protons)Neutrons N:49Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.4411764705882 (= neutron-proton ratio)Neutron excess (N-Z):15Isotopic mass:82.919119(3) u (atomic weight of Selenium-83)Nuclide mass:82.9004679 u (calculated nuclear mass without electrons)Mass excess:-75.34017 MeVMass defect:0.77151297200001 u (per nucleus)Nuclear binding energy:718.65970434 MeV (per nucleus) 8.65855065 MeV (average binding energy per nucleon)Separation energy:SN = 5.818(3) MeV (first neutron) SP = 12.524(5) MeV (first proton)Half-life:22.3(3) minDecay constant λ:0.00051804722014944 s-1Specific activity α:3.762405242229 × 10+18 Bq g-1 101686628.16837 Ci g-1Spin and parity: (nuclear angular momentum)9/2+Year of discovery:1937
Radioactive Decay
Half-life T½ = 22.3(3) min (minutes) respectively 1.338 × 103 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 49) and isobaric (same nucleon number A = 83) with Selenium-83. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
