Zinc-73

Properties and data of the isotope ⁷³Zn.

Content

General data

Name of the isotope:Zinc-73; Zn-73Symbol:⁷³Zn or 7330ZnMass number A:73 (= number of nucleons)Atomic number Z:30 (= number of protons)Neutrons N:43Isotopic mass:72.9295826(20) u (atomic weight of Zinc-73)Nuclide mass:72.9131257 u (calculated nuclear mass without electrons)Mass excess:-65.59339 MeVMass defect:0.677759748 u (per nucleus)Nuclear binding energy:631.3291387 MeV (per nucleus)
8.64834437 MeV (average binding energy per nucleon)Separation energy:S_N = 5.5192(28) MeV (first neutron)
S_P = 13.0994(23) MeV (first proton)Half-life:24.5(2) sDecay constant λ:0.028291721655508 s^-1Specific activity α:2.366343513605 × 10⁺²⁰ Bq g^-1
6395523009.7443 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μ_N) = +0.5585(5)Nuclear g-factor:g_l = 1.117Year of discovery:1972

Radioactive Decay

Half-life T_½ = 24.5(2) s respectively 2.45 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷³Ga	100 %	4.1059(25) MeV

Parent Nuclides

Direct parent isotope is: ⁷³Cu.

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
^73m1Zn	195.5(2) keV	13.0(2) ms	5/2+
^73m2Zn	237.6(20) keV	5.8(8) s	(7/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 43) and isobaric (same nucleon number A = 73) with Zinc-73. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 43	Isobar A = 73
23	⁶⁶V
24	⁶⁷Cr
25	⁶⁸Mn
26	⁶⁹Fe	⁷³Fe
27	⁷⁰Co	⁷³Co
28	⁷¹Ni	⁷³Ni
29	⁷²Cu	⁷³Cu
30	⁷³Zn	⁷³Zn
31	⁷⁴Ga	⁷³Ga
32	⁷⁵Ge	⁷³Ge
33	⁷⁶As	⁷³As
34	⁷⁷Se	⁷³Se
35	⁷⁸Br	⁷³Br
36	⁷⁹Kr	⁷³Kr
37	⁸⁰Rb	⁷³Rb
38	⁸¹Sr	⁷³Sr
39	⁸²Y
40	⁸³Zr
41	⁸⁴Nb
42	⁸⁵Mo
43	⁸⁶Tc
44	⁸⁷Ru