Copper-57

Properties and data of the isotope ⁵⁷Cu.

Contents

General data

Name of the isotope:Copper-57; Cu-57Symbol:⁵⁷Cu or 5729CuMass number A:57 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:28Isotopic mass:56.9492118(6) u (atomic weight of Copper-57)Nuclide mass:56.9333034 u (calculated nuclear mass without electrons)Mass excess:-47.3089 MeVMass defect:0.52033177600001 u (per nucleus)Nuclear binding energy:484.68592735 MeV (per nucleus)
8.50326188 MeV (average binding energy per nucleon)Separation energy:S_N = 16.737(15) MeV (first neutron)
S_P = 0.6903(4) MeV (first proton)Half-life:196.3(7) msDecay constant λ:3.5310605224653 s^-1Specific activity α:3.797239973437 × 10⁺²² Bq g^-1
1026281073901.9 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2-Isobaric spin: -1/2Magnetic dipole moment:μ(μ_N) = +2.582(7)Nuclear g-factor:g_l = 1.7213333333333Mirror nucleus:Nickel-57Year of discovery:1976

Radioactive Decay

Half-life T_½ = 196.3(7) ms respectively 1.963 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	⁵⁷Ni	100 %	8.7749(8) MeV

Parent Nuclides

Direct parent isotope is: ⁵⁷Zn.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 28) and isobaric (same nucleon number A = 57) with Copper-57. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 28	Isobar A = 57
11	³⁹Na
12	⁴⁰Mg
13	⁴¹Al
14	⁴²Si
15	⁴³P
16	⁴⁴S
17	⁴⁵Cl
18	⁴⁶Ar
19	⁴⁷K
20	⁴⁸Ca	⁵⁷Ca
21	⁴⁹Sc	⁵⁷Sc
22	⁵⁰Ti	⁵⁷Ti
23	⁵¹V	⁵⁷V
24	⁵²Cr	⁵⁷Cr
25	⁵³Mn	⁵⁷Mn
26	⁵⁴Fe	⁵⁷Fe
27	⁵⁵Co	⁵⁷Co
28	⁵⁶Ni	⁵⁷Ni
29	⁵⁷Cu	⁵⁷Cu
30	⁵⁸Zn	⁵⁷Zn
31	⁵⁹Ga
32	⁶⁰Ge