Copper-72m

Properties and data of the isotope ⁷²Cu.

Contents

General data

Name of the isotope:Copper-72m; Cu-72mSymbol:⁷²Cu or 7229CuMass number A:72 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:43Isotopic mass:71.9358203(15) u (atomic weight of Copper-72m)
Excitation energy: 270.3 keVNuclide mass:71.9199119 u (calculated nuclear mass without electrons)Mass excess:-59.78301 MeVMass defect:0.663697016 u (per nucleus)Nuclear binding energy:618.22978822 MeV (per nucleus)
8.58652484 MeV (average binding energy per nucleon)Half-life:176(3) μsDecay constant λ:393833.62531815 s^-1Specific activity α:3.340452911331 × 10⁺²⁷ Bq g^-1
9.02825111170 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)(6-)

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
⁷²Cu		6.63(3) s	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 = 72) with Copper-72m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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