Nickel-54

Properties and data of the isotope ⁵⁴Ni.

Contents

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

General data

Name of the isotope:Nickel-54; Ni-54Symbol:⁵⁴Ni or 5428NiMass number A:54 (= number of nucleons)Atomic number Z:28 (= number of protons)Neutrons N:26Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):0.92857142857143 (= neutron-proton ratio)Neutron excess (N-Z):-2Isotopic mass:53.957833(5) u (atomic weight of Nickel-54)Nuclide mass:53.9424732 u (calculated nuclear mass without electrons)Mass excess:-39.27831 MeVMass defect:0.486555712 u (per nucleus)Nuclear binding energy:453.22372639 MeV (per nucleus)
8.39303197 MeV (average binding energy per nucleon)Separation energy:S_N = 17.719(26) MeV (first neutron)
S_P = 3.908(5) MeV (first proton)Half-life:114.2(3) msDecay constant λ:6.0695900224163 s^-1Specific activity α:6.8965898258 × 10⁺²² Bq g^-1
1863943196178.4 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Mirror nucleus:Iron-54Year of discovery:1977

Radioactive Decay

Half-life T_½ = 114.2(3) ms respectively 1.142 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁵⁴Co	100 %	8.732(5) MeV

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^54mNi	6457.4(9) keV	152(4) ns	10+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 26) and isobaric (same nucleon number A = 54) with Nickel-54. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 26	Isobar A = 54
11	³⁷Na
12	³⁸Mg
13	³⁹Al
14	⁴⁰Si
15	⁴¹P
16	⁴²S
17	⁴³Cl
18	⁴⁴Ar	⁵⁴Ar
19	⁴⁵K	⁵⁴K
20	⁴⁶Ca	⁵⁴Ca
21	⁴⁷Sc	⁵⁴Sc
22	⁴⁸Ti	⁵⁴Ti
23	⁴⁹V	⁵⁴V
24	⁵⁰Cr	⁵⁴Cr
25	⁵¹Mn	⁵⁴Mn
26	⁵²Fe	⁵⁴Fe
27	⁵³Co	⁵⁴Co
28	⁵⁴Ni	⁵⁴Ni
29	⁵⁵Cu	⁵⁴Cu
30	⁵⁶Zn	⁵⁴Zn