Copper-73

Properties and data of the isotope ⁷³Cu.

Content

General data

Name of the isotope:Copper-73; Cu-73Symbol:⁷³Cu or 7329CuMass number A:73 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:44Isotopic mass:72.9366744(21) u (atomic weight of Copper-73)Nuclide mass:72.920766 u (calculated nuclear mass without electrons)Mass excess:-58.98742 MeVMass defect:0.671507832 u (per nucleus)Nuclear binding energy:625.50551646 MeV (per nucleus)
8.56856872 MeV (average binding energy per nucleon)Separation energy:S_N = 7.2757(24) MeV (first neutron)
S_P = 12.050(3) MeV (first proton)Half-life:4.2(3) sDecay constant λ:0.16503504299046 s^-1Specific activity α:1.380367049603 × 10⁺²¹ Bq g^-1
37307217556.843 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2-Magnetic dipole moment:μ(μ_N) = +1.7425(9)Quadrupole moment Q:-0.23(2) barn (100 fm²)Nuclear g-factor:g_l = 1.1616666666667Year of discovery:1983

Radioactive Decay

Half-life T_½ = 4.2(3) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷³Zn	100 %	6.6060(27) MeV
β^-, n	⁷²Zn	?

Parent Nuclides

Direct parent isotope is: ⁷³Ni.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 73) with Copper-73. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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