Cobalt-50

Properties and data of the isotope ⁵⁰Co.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Cobalt-50; Co-50Symbol:⁵⁰Co or 5027CoMass number A:50 (= number of nucleons)Atomic number Z:27 (= number of protons)Neutrons N:23Isotopic mass:49.98107(43) u (atomic weight of Cobalt-50)Nuclide mass:49.9662587 u (calculated nuclear mass without electrons)Mass excess:-17.63318 MeVMass defect:0.429498932 u (per nucleus)Nuclear binding energy:400.07567816 MeV (per nucleus)
8.00151356 MeV (average binding energy per nucleon)Separation energy:S_N = 15.82(64) MeV (first neutron)
S_P = 0.17(40) MeV (first proton)Half-life:38(2) msDecay constant λ:18.240715277893 s^-1Specific activity α:2.241799118152 × 10⁺²³ Bq g^-1
6058916535547.3 Ci g^-1Spin and parity:
(nuclear angular momentum)(6+)Isobaric spin: 2Mirror nucleus:Vanadium-50Year of discovery:1987

Radioactive Decay

Half-life T_½ = 38(2) ms respectively 3.8 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
β⁺, p	⁴⁹Mn	70.5(7) %
EC, 2p	⁴⁸Mn	?
β⁺	⁵⁰Fe	?	16,85(40) MeV

Parent Nuclides

Direct parent isotope is: ⁵⁰Ni.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 23) and isobaric (same nucleon number A = 50) with Cobalt-50. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 23	Isobar A = 50
10	³³Ne
11	³⁴Na
12	³⁵Mg
13	³⁶Al
14	³⁷Si
15	³⁸P
16	³⁹S
17	⁴⁰Cl	⁵⁰Cl
18	⁴¹Ar	⁵⁰Ar
19	⁴²K	⁵⁰K
20	⁴³Ca	⁵⁰Ca
21	⁴⁴Sc	⁵⁰Sc
22	⁴⁵Ti	⁵⁰Ti
23	⁴⁶V	⁵⁰V
24	⁴⁷Cr	⁵⁰Cr
25	⁴⁸Mn	⁵⁰Mn
26	⁴⁹Fe	⁵⁰Fe
27	⁵⁰Co	⁵⁰Co
28	⁵¹Ni	⁵⁰Ni