Copper-77

Properties and data of the isotope ⁷⁷Cu.

Contents

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

General data

Name of the isotope:Copper-77; Cu-77Symbol:⁷⁷Cu or 7729CuMass number A:77 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:48Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.6551724137931 (= neutron-proton ratio)Neutron excess (N-Z):19Isotopic mass:76.94780(16) u (atomic weight of Copper-77)Nuclide mass:76.9318916 u (calculated nuclear mass without electrons)Mass excess:-48.62399 MeVMass defect:0.69504189600001 u (per nucleus)Nuclear binding energy:647.42735587 MeV (per nucleus)
8.40814748 MeV (average binding energy per nucleon)Separation energy:S_N = 5.72(15) MeV (first neutron)
S_P = 14.28(43) MeV (first proton)Half-life:467.9(21) msDecay constant λ:1.4814002576618 s^-1Specific activity α:1.173842239682 × 10⁺²² Bq g^-1
317254659373.59 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2-Magnetic dipole moment:μ(μ_N) = +1.61(5)Nuclear g-factor:g_l = 0.644Year of discovery:1987

Radioactive Decay

Half-life T_½ = 467.9(21) ms respectively 4.679 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷⁷Zn	69.7 %	10.16(15) MeV
β^-, n	⁷⁶Zn	30.3(20) %	5.61(15)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 48) and isobaric (same nucleon number A = 77) with Copper-77. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 48	Isobar A = 77
26	⁷⁴Fe
27	⁷⁵Co
28	⁷⁶Ni	⁷⁷Ni
29	⁷⁷Cu	⁷⁷Cu
30	⁷⁸Zn	⁷⁷Zn
31	⁷⁹Ga	⁷⁷Ga
32	⁸⁰Ge	⁷⁷Ge
33	⁸¹As	⁷⁷As
34	⁸²Se	⁷⁷Se
35	⁸³Br	⁷⁷Br
36	⁸⁴Kr	⁷⁷Kr
37	⁸⁵Rb	⁷⁷Rb
38	⁸⁶Sr	⁷⁷Sr
39	⁸⁷Y	⁷⁷Y
40	⁸⁸Zr	⁷⁷Zr
41	⁸⁹Nb
42	⁹⁰Mo
43	⁹¹Tc
44	⁹²Ru
45	⁹³Rh
46	⁹⁴Pd
47	⁹⁵Ag
48	⁹⁶Cd
49	⁹⁷In
50	⁹⁸Sn