Copper-71

Properties and data of the isotope ⁷¹Cu.

Contents

See also: List of individual Copper isotopes (and general data sources).

General data

Name of the isotope:Copper-71; Cu-71Symbol: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-71)Nuclide 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)Separation energy:S_N = 7.8061(18) MeV (first neutron)
S_P = 10.7862(26) MeV (first proton)Half-life:19.4(16) sDecay constant λ:0.035729236111337 s^-1Specific activity α:3.073807038291 × 10⁺²⁰ Bq g^-1
8307586589.9773 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2(-)Magnetic dipole moment:μ(μ_N) = +2.2747(8)Quadrupole moment Q:0.190(16) barn (100 fm²)Nuclear g-factor:g_l = 1.5164666666667Year of discovery:1983

Radioactive Decay

Half-life T_½ = 19.4(16) s respectively 1.94 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷¹Zn	100 %	4.618(3) MeV

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
^71mCu	2755.7(6) keV	0.271(14) μs	(19/2-)

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-71. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 42	Isobar A = 71
21	⁶³Sc
22	⁶⁴Ti
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