Copper-69

Properties and data of the isotope ⁶⁹Cu.

Contents

General data

Name of the isotope:Copper-69; Cu-69Symbol:⁶⁹Cu or 6929CuMass number A:69 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:40Isotopic mass:68.9294293(15) u (atomic weight of Copper-69)Nuclide mass:68.9135209 u (calculated nuclear mass without electrons)Mass excess:-65.73618 MeVMass defect:0.64409326800001 u (per nucleus)Nuclear binding energy:599.96901458 MeV (per nucleus)
8.69520311 MeV (average binding energy per nucleon)Separation energy:S_N = 8.2405(21) MeV (first neutron)
S_P = 9.561(3) MeV (first proton)Half-life:2.85(15) minDecay constant λ:0.0040534922839763 s^-1Specific activity α:3.589809045407 × 10⁺¹⁹ Bq g^-1
970218660.92097 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2-Magnetic dipole moment:μ(μ_N) = +2.8383(10)Quadrupole moment Q:-0.147(16) barn (100 fm²)Nuclear g-factor:g_l = 1.8922Year of discovery:1966

Radioactive Decay

Half-life T_½ = 2.85(15) min (minutes) respectively 1.71 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁹Zn	100 %	2.6816(16) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁹Ni.

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
^69mCu	27420(7) keV	357(2) ns	(13/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 40) and isobaric (same nucleon number A = 69) with Copper-69. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 40	Isobar A = 69
21	⁶¹Sc
22	⁶²Ti
23	⁶³V
24	⁶⁴Cr
25	⁶⁵Mn	⁶⁹Mn
26	⁶⁶Fe	⁶⁹Fe
27	⁶⁷Co	⁶⁹Co
28	⁶⁸Ni	⁶⁹Ni
29	⁶⁹Cu	⁶⁹Cu
30	⁷⁰Zn	⁶⁹Zn
31	⁷¹Ga	⁶⁹Ga
32	⁷²Ge	⁶⁹Ge
33	⁷³As	⁶⁹As
34	⁷⁴Se	⁶⁹Se
35	⁷⁵Br	⁶⁹Br
36	⁷⁶Kr	⁶⁹Kr
37	⁷⁷Rb
38	⁷⁸Sr
39	⁷⁹Y
40	⁸⁰Zr
41	⁸¹Nb
42	⁸²Mo