Nickel-73

Properties and data of the isotope ⁷³Ni.

Content

General data

Name of the isotope:Nickel-73; Ni-73Symbol:⁷³Ni or 7328NiMass number A:73 (= number of nucleons)Atomic number Z:28 (= number of protons)Neutrons N:45Isotopic mass:72.9462067(26) u (atomic weight of Nickel-73)Nuclide mass:72.9308469 u (calculated nuclear mass without electrons)Mass excess:-50.10814 MeVMass defect:0.662815416 u (per nucleus)Nuclear binding energy:617.40858311 MeV (per nucleus)
8.45765182 MeV (average binding energy per nucleon)Separation energy:S_N = 3.953(3) MeV (first neutron)
S_P = 17.20(40) MeV (first proton)Half-life:0.84(3) sDecay constant λ:0.82517521495232 s^-1Specific activity α:6.901835248015 × 10⁺²¹ Bq g^-1
186536087784.21 Ci g^-1Spin and parity:
(nuclear angular momentum)(9/2+)Year of discovery:1987

Radioactive Decay

Half-life T_½ = 0.84(3) s respectively 8.4 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷³Cu	100 %	8.879(3) MeV
β^-, n	⁷²Cu	?	1.6035(28) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 45) and isobaric (same nucleon number A = 73) with Nickel-73. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 45	Isobar A = 73
25	⁷⁰Mn
26	⁷¹Fe	⁷³Fe
27	⁷²Co	⁷³Co
28	⁷³Ni	⁷³Ni
29	⁷⁴Cu	⁷³Cu
30	⁷⁵Zn	⁷³Zn
31	⁷⁶Ga	⁷³Ga
32	⁷⁷Ge	⁷³Ge
33	⁷⁸As	⁷³As
34	⁷⁹Se	⁷³Se
35	⁸⁰Br	⁷³Br
36	⁸¹Kr	⁷³Kr
37	⁸²Rb	⁷³Rb
38	⁸³Sr	⁷³Sr
39	⁸⁴Y
40	⁸⁵Zr
41	⁸⁶Nb
42	⁸⁷Mo
43	⁸⁸Tc
44	⁸⁹Ru
45	⁹⁰Rh
46	⁹¹Pd
47	⁹²Ag