Bromine-82

Properties and data of the isotope ⁸²Br.

Contents

See also: List of individual Bromine isotopes (and general data sources).

General data

Name of the isotope:Bromine-82; Br-82Symbol:⁸²Br or 8235BrMass number A:82 (= number of nucleons)Atomic number Z:35 (= number of protons)Neutrons N:47Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3428571428571 (= neutron-proton ratio)Neutron excess (N-Z):12Isotopic mass:81.9168018(10) u (atomic weight of Bromine-82)Nuclide mass:81.8976022 u (calculated nuclear mass without electrons)Mass excess:-77.49862 MeVMass defect:0.764325372 u (per nucleus)Nuclear binding energy:711.96449807 MeV (per nucleus)
8.68249388 MeV (average binding energy per nucleon)Separation energy:S_N = 7.59294(12) MeV (first neutron)
S_P = 8.3986(14) MeV (first proton)Half-life:35.282(7) hDecay constant λ:5.457198670394 × 10^-6 s^-1Specific activity α:4.057286307873 × 10⁺¹⁶ Bq g^-1
1096563.8669929 Ci g^-1Spin and parity:
(nuclear angular momentum)5-Magnetic dipole moment:μ(μ_N) = +1.6256(6)Quadrupole moment Q:+ 0.707(10) barn (100 fm²)Nuclear g-factor:g_l = 0.32512Year of discovery:1937

Radioactive Decay

Half-life T_½ = 35.282(7) h (hours) respectively 1.270152 × 10⁵ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁸²Kr	100 %	3.0931(10) MeV

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^82mBr	45.9492(10) keV	6.13(5) min	2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 47) and isobaric (same nucleon number A = 82) with Bromine-82. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 47	Isobar A = 82
26	⁷³Fe
27	⁷⁴Co
28	⁷⁵Ni
29	⁷⁶Cu	⁸²Cu
30	⁷⁷Zn	⁸²Zn
31	⁷⁸Ga	⁸²Ga
32	⁷⁹Ge	⁸²Ge
33	⁸⁰As	⁸²As
34	⁸¹Se	⁸²Se
35	⁸²Br	⁸²Br
36	⁸³Kr	⁸²Kr
37	⁸⁴Rb	⁸²Rb
38	⁸⁵Sr	⁸²Sr
39	⁸⁶Y	⁸²Y
40	⁸⁷Zr	⁸²Zr
41	⁸⁸Nb	⁸²Nb
42	⁸⁹Mo	⁸²Mo
43	⁹⁰Tc
44	⁹¹Ru
45	⁹²Rh
46	⁹³Pd
47	⁹⁴Ag
48	⁹⁵Cd
49	⁹⁶In