Gallium-73

Properties and data of the isotope ⁷³Ga.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Gallium-73; Ga-73Symbol:⁷³Ga or 7331GaMass number A:73 (= number of nucleons)Atomic number Z:31 (= number of protons)Neutrons N:42Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.3548387096774 (= neutron-proton ratio)Neutron excess (N-Z):11Isotopic mass:72.9251747(18) u (atomic weight of Gallium-73)Nuclide mass:72.9081693 u (calculated nuclear mass without electrons)Mass excess:-69.69932 MeVMass defect:0.681327764 u (per nucleus)Nuclear binding energy:634.6527242 MeV (per nucleus)
8.69387293 MeV (average binding energy per nucleon)Separation energy:S_N = 9.1824(19) MeV (first neutron)
S_P = 8.8428(27) MeV (first proton)Half-life:4.86(3) hDecay constant λ:3.961746573845 × 10^-5 s^-1Specific activity α:3.313638322092 × 10⁺¹⁷ Bq g^-1
8955779.2488992 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μ_N) = +0.209(2)Nuclear g-factor:g_l = 0.418Year of discovery:1949

Radioactive Decay

Half-life T_½ = 4.86(3) h (hours) respectively 1.7496 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷³Ge	100 %	1.5982(17) MeV

Parent Nuclides

Direct parent isotope is: ⁷³Zn.

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
^73mGa	0.3 keV	200 ms	3/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 42) and isobaric (same nucleon number A = 73) with Gallium-73. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 42	Isobar A = 73
21	⁶³Sc
22	⁶⁴Ti
23	⁶⁵V
24	⁶⁶Cr
25	⁶⁷Mn
26	⁶⁸Fe	⁷³Fe
27	⁶⁹Co	⁷³Co
28	⁷⁰Ni	⁷³Ni
29	⁷¹Cu	⁷³Cu
30	⁷²Zn	⁷³Zn
31	⁷³Ga	⁷³Ga
32	⁷⁴Ge	⁷³Ge
33	⁷⁵As	⁷³As
34	⁷⁶Se	⁷³Se
35	⁷⁷Br	⁷³Br
36	⁷⁸Kr	⁷³Kr
37	⁷⁹Rb	⁷³Rb
38	⁸⁰Sr	⁷³Sr
39	⁸¹Y
40	⁸²Zr
41	⁸³Nb
42	⁸⁴Mo
43	⁸⁵Tc
44	⁸⁶Ru