Zinc-74

Properties and data of the isotope ⁷⁴Zn.

Content

General data

Name of the isotope:Zinc-74; Zn-74Symbol:⁷⁴Zn or 7430ZnMass number A:74 (= number of nucleons)Atomic number Z:30 (= number of protons)Neutrons N:44Isotopic mass:73.9294073(27) u (atomic weight of Zinc-74)Nuclide mass:73.9129504 u (calculated nuclear mass without electrons)Mass excess:-65.75668 MeVMass defect:0.68659996400001 u (per nucleus)Nuclear binding energy:639.56374687 MeV (per nucleus)
8.64275334 MeV (average binding energy per nucleon)Separation energy:S_N = 8.235(3) MeV (first neutron)
S_P = 14.058(3) MeV (first proton)Half-life:95.6(12) sDecay constant λ:0.0072504935205015 s^-1Specific activity α:5.981300449934 × 10⁺¹⁹ Bq g^-1
1616567689.1714 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1972

Radioactive Decay

Half-life T_½ = 95.6(12) s respectively 9.56 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷⁴Ga	100 %	2.293(4) MeV

Parent Nuclides

Direct parent isotopes are: ⁷⁴Cu, ⁷⁵Cu.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 74) with Zinc-74. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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