Cobalt-54
Properties and data of the isotope 54Co.
See also: list of Cobalt isotopes.
General data
Name of the isotope:Cobalt-54; Co-54Symbol:54Co or 5427CoMass number A:54 (= number of nucleons)Atomic number Z:27 (= number of protons)Neutrons N:27Isotopic mass:53.9484592(4) u (atomic weight of Cobalt-54)Nuclide mass:53.9336479 u (calculated nuclear mass without electrons)Mass excess:-48.00995 MeVMass defect:0.496769396 u (per nucleus)Nuclear binding energy:462.73771176 MeV (per nucleus)
8.56921688 MeV (average binding energy per nucleon)Separation energy:SN = 13.4218(17) MeV (first neutron)
SP = 4.3514(16) MeV (first proton)Half-life:193.28(7) msDecay constant λ:3.5862333431289 s-1Specific activity α:4.074868367721 × 10+22 Bq g-1
1101315775059.9 Ci g-1Spin and parity:
(nuclear angular momentum)0+Isobaric spin: 1Year of discovery:1952
Radioactive Decay
Half-life T½ = 193.28(7) ms respectively 1.9328 × 10-1 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EE β+ | 54Fe | 100 % | 8.2445(5) MeV | |
Parent Nuclides
Direct parent isotope is: 54Ni.
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 |
---|
54mCo | 197.1(4) keV | 1.48(2) min | 7+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 27) and isobaric (same nucleon number A = 54) with Cobalt-54. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 27 | Isobar A = 54 |
11 | 38Na | |
12 | 39Mg | |
13 | 40Al | |
14 | 41Si | |
15 | 42P | |
16 | 43S | |
17 | 44Cl | |
18 | 45Ar | |
19 | 46K | 54K |
20 | 47Ca | 54Ca |
21 | 48Sc | 54Sc |
22 | 49Ti | 54Ti |
23 | 50V | 54V |
24 | 51Cr | 54Cr |
25 | 52Mn | 54Mn |
26 | 53Fe | 54Fe |
27 | 54Co | 54Co |
28 | 55Ni | 54Ni |
29 | 56Cu | 54Cu |
30 | 57Zn | 54Zn |
31 | 58Ga | |
32 | 59Ge | |
External data and identifiers
Last update: 2020-10-14
Perma link: https://www.chemlin.org/isotope/cobalt-54
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