Nickel-50

Properties and data of the isotope ⁵⁰Ni.

Contents

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

General data

Name of the isotope:Nickel-50; Ni-50Symbol:⁵⁰Ni or 5028NiMass number A:50 (= number of nucleons)Atomic number Z:28 (= number of protons)Neutrons N:22Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):0.78571428571429 (= neutron-proton ratio)Neutron excess (N-Z):-6Isotopic mass:49.99558(54) u (atomic weight of Nickel-50)Nuclide mass:49.9802202 u (calculated nuclear mass without electrons)Mass excess:-4.1172 MeVMass defect:0.41414904800001 u (per nucleus)Nuclear binding energy:385.77735332 MeV (per nucleus)
7.71554707 MeV (average binding energy per nucleon)Separation energy:S_N = 20.39(78) MeV (first neutron)
S_P = 1.53(71) MeV (first proton)Half-life:18.5(12) msDecay constant λ:37.467415165402 s^-1Specific activity α:4.60477656701 × 10⁺²³ Bq g^-1
12445342073016 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Mirror nucleus:Titanium-50Year of discovery:1994

Radioactive Decay

Half-life T_½ = 18.5(12) ms respectively 1.85 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
EC/β⁺	⁵⁰Co		13.51(64) MeV
ε, p	⁴⁹Fe	73(6) %
EC, 2p	⁴⁸Fe	14(5) %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 22) and isobaric (same nucleon number A = 50) with Nickel-50. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 22	Isobar A = 50
9	³¹F
10	³²Ne
11	³³Na
12	³⁴Mg
13	³⁵Al
14	³⁶Si
15	³⁷P
16	³⁸S
17	³⁹Cl	⁵⁰Cl
18	⁴⁰Ar	⁵⁰Ar
19	⁴¹K	⁵⁰K
20	⁴²Ca	⁵⁰Ca
21	⁴³Sc	⁵⁰Sc
22	⁴⁴Ti	⁵⁰Ti
23	⁴⁵V	⁵⁰V
24	⁴⁶Cr	⁵⁰Cr
25	⁴⁷Mn	⁵⁰Mn
26	⁴⁸Fe	⁵⁰Fe
27	⁴⁹Co	⁵⁰Co
28	⁵⁰Ni	⁵⁰Ni