See also: List of individual Bromine isotopes (and general data sources).
General data
Name of the isotope:Bromine-71; Br-71Symbol:71Br or 7135BrMass number A:71 (= number of nucleons)Atomic number Z:35 (= number of protons)Neutrons N:36Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.0285714285714 (= neutron-proton ratio)Neutron excess (N-Z):1Isotopic mass:70.939342(6) u (atomic weight of Bromine-71)Nuclide mass:70.9201424 u (calculated nuclear mass without electrons)Mass excess:-56.50256 MeVMass defect:0.64647109600001 u (per nucleus)Nuclear binding energy:602.1839471 MeV (per nucleus) 8.48146404 MeV (average binding energy per nucleon)Separation energy:SN = 13.148(16) MeV (first neutron) SP = 1.861(6) MeV (first proton)Half-life:21.4(6) sDecay constant λ:0.032390055166353 s-1Specific activity α:2.749637449920 × 10+20 Bq g-1 7431452567.3535 Ci g-1Spin and parity: (nuclear angular momentum)(5/2)-Mirror nucleus:Krypton-71Year of discovery:1981
Radioactive Decay
Half-life T½ = 21.4(6) s respectively 2.14 × 101 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 36) and isobaric (same nucleon number A = 71) with Bromine-71. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
