Copper-61

Properties and data of the isotope ⁶¹Cu.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

Literature

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

General data

Name of the isotope:Copper-61; Cu-61Symbol:⁶¹Cu or 6129CuMass number A:61 (= number of nucleons)Atomic number Z:29 (= number of protons)Neutrons N:32Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.1034482758621 (= neutron-proton ratio)Neutron excess (N-Z):3Isotopic mass:60.9334574(10) u (atomic weight of Copper-61)Nuclide mass:60.917549 u (calculated nuclear mass without electrons)Mass excess:-61.98403 MeVMass defect:0.57074584 u (per nucleus)Nuclear binding energy:531.64632548 MeV (per nucleus)
8.71551353 MeV (average binding energy per nucleon)Separation energy:S_N = 11.7102(18) MeV (first neutron)
S_P = 4.7999(10) MeV (first proton)Half-life:3.339(8) hDecay constant λ:5.766423584572 × 10^-5 s^-1Specific activity α:5.787702514059 × 10⁺¹⁷ Bq g^-1
15642439.227188 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2-Magnetic dipole moment:μ(μ_N) = +2.1107(5)Quadrupole moment Q:-0.221(10) barn (100 fm²)Nuclear g-factor:g_l = 1.4071333333333Mirror nucleus:Germanium-61Year of discovery:1937

Radioactive Decay

Half-life T_½ = 3.339(8) h (hours) respectively 1.20204 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁶¹Ni	100 %	2.2378(10) MeV

Parent Nuclides

Direct parent isotope is: ⁶¹Zn.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 32) and isobaric (same nucleon number A = 61) with Copper-61. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 32	Isobar A = 61
15	⁴⁷P
16	⁴⁸S
17	⁴⁹Cl
18	⁵⁰Ar
19	⁵¹K
20	⁵²Ca
21	⁵³Sc	⁶¹Sc
22	⁵⁴Ti	⁶¹Ti
23	⁵⁵V	⁶¹V
24	⁵⁶Cr	⁶¹Cr
25	⁵⁷Mn	⁶¹Mn
26	⁵⁸Fe	⁶¹Fe
27	⁵⁹Co	⁶¹Co
28	⁶⁰Ni	⁶¹Ni
29	⁶¹Cu	⁶¹Cu
30	⁶²Zn	⁶¹Zn
31	⁶³Ga	⁶¹Ga
32	⁶⁴Ge	⁶¹Ge
33	⁶⁵As
34	⁶⁶Se
35	⁶⁷Br
36	⁶⁸Kr