Copper-70

Properties and data of the isotope ⁷⁰Cu.

Contents

General data

Name of the isotope:Copper-70; Cu-70Symbol:⁷⁰Cu or 7029CuMass number A:70 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:41Isotopic mass:69.9323921(12) u (atomic weight of Copper-70)Nuclide mass:69.9164837 u (calculated nuclear mass without electrons)Mass excess:-62.97635 MeVMass defect:0.649795384 u (per nucleus)Nuclear binding energy:605.28050142 MeV (per nucleus)
8.64686431 MeV (average binding energy per nucleon)Separation energy:S_N = 5.3115(18) MeV (first neutron)
S_P = 10.287(4) MeV (first proton)Half-life:44.5(2) sDecay constant λ:0.015576341136179 s^-1Specific activity α:1.359462614557 × 10⁺²⁰ Bq g^-1
3674223282.5889 Ci g^-1Spin and parity:
(nuclear angular momentum)6-Magnetic dipole moment:μ(μ_N) = +1.3666(5)Quadrupole moment Q:-0.285(14) barn (100 fm²)Nuclear g-factor:g_l = 0.22776666666667Year of discovery:1971

Radioactive Decay

Half-life T_½ = 44.5(2) s respectively 4.45 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷⁰Zn	100 %	6.588(4) MeV

Parent Nuclides

Direct parent isotope is: ⁷⁰Ni.

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
^70m1Cu	101.1(3) keV	33(2) s	3-
^70m2Cu	242.6(5) keV	6.6(2) s	1+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 41) and isobaric (same nucleon number A = 70) with Copper-70. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 41	Isobar A = 70
22	⁶³Ti
23	⁶⁴V
24	⁶⁵Cr
25	⁶⁶Mn	⁷⁰Mn
26	⁶⁷Fe	⁷⁰Fe
27	⁶⁸Co	⁷⁰Co
28	⁶⁹Ni	⁷⁰Ni
29	⁷⁰Cu	⁷⁰Cu
30	⁷¹Zn	⁷⁰Zn
31	⁷²Ga	⁷⁰Ga
32	⁷³Ge	⁷⁰Ge
33	⁷⁴As	⁷⁰As
34	⁷⁵Se	⁷⁰Se
35	⁷⁶Br	⁷⁰Br
36	⁷⁷Kr	⁷⁰Kr
37	⁷⁸Rb
38	⁷⁹Sr
39	⁸⁰Y
40	⁸¹Zr
41	⁸²Nb
42	⁸³Mo
44	⁸⁵Ru