Copper-71m

Properties and data of the isotope ⁷¹Cu.

Content

General data

Name of the isotope:Copper-71m; Cu-71mSymbol:⁷¹Cu or 7129CuMass number A:71 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:42Isotopic mass:70.9326768(16) u (atomic weight of Copper-71m)
Excitation energy: 2755.7(6) keVNuclide mass:70.9167684 u (calculated nuclear mass without electrons)Mass excess:-62.71116 MeVMass defect:0.65817560000001 u (per nucleus)Nuclear binding energy:613.08662235 MeV (per nucleus)
8.63502285 MeV (average binding energy per nucleon)Half-life:0.271(14) μsDecay constant λ:2557738.6736529 s^-1Specific activity α:2.200437510806 × 10⁺²⁸ Bq g^-1
5.947128407585 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)(19/2-)

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
⁷¹Cu		19.4(16) s	3/2(-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 42) and isobaric (same nucleon number A = 71) with Copper-71m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 42	Isobar A = 71
23	⁶⁵V
24	⁶⁶Cr
25	⁶⁷Mn	⁷¹Mn
26	⁶⁸Fe	⁷¹Fe
27	⁶⁹Co	⁷¹Co
28	⁷⁰Ni	⁷¹Ni
29	⁷¹Cu	⁷¹Cu
30	⁷²Zn	⁷¹Zn
31	⁷³Ga	⁷¹Ga
32	⁷⁴Ge	⁷¹Ge
33	⁷⁵As	⁷¹As
34	⁷⁶Se	⁷¹Se
35	⁷⁷Br	⁷¹Br
36	⁷⁸Kr	⁷¹Kr
37	⁷⁹Rb	⁷¹Rb
38	⁸⁰Sr
39	⁸¹Y
40	⁸²Zr
41	⁸³Nb
42	⁸⁴Mo
43	⁸⁵Tc
44	⁸⁶Ru