Cobalt-59

Properties and data of the isotope ⁵⁹Co.

Contents

General data

Name of the isotope:Cobalt-59; Co-59Symbol:⁵⁹Co or 5927CoMass number A:59 (= number of nucleons)Atomic number Z:27 (= number of protons)Neutrons N:32Isotopic mass:58.933194(4) u (atomic weight of Cobalt-59)Nuclide mass:58.9183827 u (calculated nuclear mass without electrons)Mass excess:-62.22939 MeVMass defect:0.555359176 u (per nucleus)Nuclear binding energy:517.31374029 MeV (per nucleus)
8.7680295 MeV (average binding energy per nucleon)Separation energy:S_N = 10.4539(11) MeV (first neutron)
S_P = 7.3636(3) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)7/2-Magnetic dipole moment:μ(μ_N) = +4.627(9)Charge radius:3.7875(21) femtometer fmMirror nucleus:Germanium-59Year of discovery:1923

Parent Nuclides

Direct parent isotopes are: ⁵⁹Ni, ⁵⁹Fe.

Occurrence

Comparison of the natural Cobalt isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Cobalt Isotopic mixture	58.933194 u	100 %
Isotope ⁵⁹Co	58.933194(4) u	100 %	stable	7/2-

NMR data

Nuclear magnetic properties of the NMR active Nuclide ⁵⁹Co

Isotope:⁵⁹Co-NMRQuantity:100 %Spin:7/2-Nuclearmagnetic moment
μ/μ_N:+4.627(9)Gyromagnetic ratio γ:6.317 · 10⁷ rad T^-1 s^-1Nuclear g-factor:g_l = 1.322Quadrupole moment Q:+ 0.42(3) barn (100 fm²)Resonance frequency:v₀ = 10.077 at 1 TRelative Sensitivity:0.27841 (H₀ = const.)
4.9703 (v₀ = const.)
[related to ¹H = 1.000]

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 32) and isobaric (same nucleon number A = 59) with Cobalt-59. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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