Copper-66

Properties and data of the isotope ⁶⁶Cu.

Contents

General data

Name of the isotope:Copper-66; Cu-66Symbol:⁶⁶Cu or 6629CuMass number A:66 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:37Isotopic mass:65.9288688(7) u (atomic weight of Copper-66)Nuclide mass:65.9129604 u (calculated nuclear mass without electrons)Mass excess:-66.25829 MeVMass defect:0.61865902 u (per nucleus)Nuclear binding energy:576.27716518 MeV (per nucleus)
8.7314722 MeV (average binding energy per nucleon)Separation energy:S_N = 7.06593(9) MeV (first neutron)
S_P = 8.4216(7) MeV (first proton)Half-life:5.120(14) minDecay constant λ:0.0022563384783852 s^-1Specific activity α:2.090459714543 × 10⁺¹⁹ Bq g^-1
564989112.03873 Ci g^-1Spin and parity:
(nuclear angular momentum)1+Magnetic dipole moment:μ(μ_N) = -0.2826(8)Nuclear g-factor:g_l = -0.2826Year of discovery:1937

Radioactive Decay

Half-life T_½ = 5.120(14) min (minutes) respectively 3.072 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁶Zn	100 %	2.6409(9) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁶Ni.

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
^66mCu	1154.2(14) keV	600(20) ns	(6)-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 37) and isobaric (same nucleon number A = 66) with Copper-66. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 37	Isobar A = 66
19	⁵⁶K
20	⁵⁷Ca
21	⁵⁸Sc
22	⁵⁹Ti
23	⁶⁰V	⁶⁶V
24	⁶¹Cr	⁶⁶Cr
25	⁶²Mn	⁶⁶Mn
26	⁶³Fe	⁶⁶Fe
27	⁶⁴Co	⁶⁶Co
28	⁶⁵Ni	⁶⁶Ni
29	⁶⁶Cu	⁶⁶Cu
30	⁶⁷Zn	⁶⁶Zn
31	⁶⁸Ga	⁶⁶Ga
32	⁶⁹Ge	⁶⁶Ge
33	⁷⁰As	⁶⁶As
34	⁷¹Se	⁶⁶Se
35	⁷²Br	⁶⁶Br
36	⁷³Kr
37	⁷⁴Rb
38	⁷⁵Sr
39	⁷⁶Y
40	⁷⁷Zr