Bromine-79m

Properties and data of the isotope ⁷⁹Br.

Content

General data

Name of the isotope:Bromine-79m; Br-79mSymbol:⁷⁹Br or 7935BrMass number A:79 (= number of nucleons)Atomic number Z:35 (= number of protons)Neutrons N:44Isotopic mass:78.918338(9) u (atomic weight of Bromine-79m)
Excitation energy: 207.61(9) keVNuclide mass:78.8991384 u (calculated nuclear mass without electrons)Mass excess:-76.06766 MeVMass defect:0.736794424 u (per nucleus)Nuclear binding energy:686.31958519 MeV (per nucleus)
8.68758969 MeV (average binding energy per nucleon)Half-life:4.86(4) sDecay constant λ:0.14262287665842 s^-1Specific activity α:1.101147503956 × 10⁺²¹ Bq g^-1
29760743350.186 Ci g^-1Spin and parity:
(nuclear angular momentum)9/2+

Radioactive Decay

Half-life T_½ = 4.86(4) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	⁷⁹Br	100 %

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
⁷⁹Br		stable	3/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 79) with Bromine-79m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 44	Isobar A = 79
23	⁶⁷V
24	⁶⁸Cr
25	⁶⁹Mn
26	⁷⁰Fe
27	⁷¹Co
28	⁷²Ni	⁷⁹Ni
29	⁷³Cu	⁷⁹Cu
30	⁷⁴Zn	⁷⁹Zn
31	⁷⁵Ga	⁷⁹Ga
32	⁷⁶Ge	⁷⁹Ge
33	⁷⁷As	⁷⁹As
34	⁷⁸Se	⁷⁹Se
35	⁷⁹Br	⁷⁹Br
36	⁸⁰Kr	⁷⁹Kr
37	⁸¹Rb	⁷⁹Rb
38	⁸²Sr	⁷⁹Sr
39	⁸³Y	⁷⁹Y
40	⁸⁴Zr	⁷⁹Zr
41	⁸⁵Nb
42	⁸⁶Mo
43	⁸⁷Tc
44	⁸⁸Ru
45	⁸⁹Rh
46	⁹⁰Pd