Cobalt-53m
Properties and data of the isotope 53mCo.
See also: list of Cobalt isotopes.
General data
Name of the isotope:Cobalt-53m; Co-53mSymbol:53mCo or 53m27CoMass number A:53 (= number of nucleons)Atomic number Z:27 (= number of protons)Neutrons N:26Isotopic mass:52.9542032(18) u (atomic weight of Cobalt-53m)
Excitation energy: 3197(29) keVNuclide mass:52.9393919 u (calculated nuclear mass without electrons)Mass excess:-42.65944 MeVMass defect:0.48236048 u (per nucleus)Nuclear binding energy:449.31589296 MeV (per nucleus)
8.47765836 MeV (average binding energy per nucleon)Half-life:247(12) msDecay constant λ:2.8062638889067 s-1Specific activity α:3.249945467144 × 10+22 Bq g-1
878363639768.7 Ci g-1Spin and parity:
(nuclear angular momentum)(19/2-)
Radioactive Decay
Half-life T½ = 247(12) ms respectively 2.47 × 10-1 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EC β+ | 53Fe | 98.5 % | | |
p | 52Fe | 1.5 % | | |
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 |
---|
53Co | | 240(9) ms | (7/2-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 26) and isobaric (same nucleon number A = 53) with Cobalt-53m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 26 | Isobar A = 53 |
11 | 37Na | |
12 | 38Mg | |
13 | 39Al | |
14 | 40Si | |
15 | 41P | |
16 | 42S | |
17 | 43Cl | |
18 | 44Ar | 53Ar |
19 | 45K | 53K |
20 | 46Ca | 53Ca |
21 | 47Sc | 53Sc |
22 | 48Ti | 53Ti |
23 | 49V | 53V |
24 | 50Cr | 53Cr |
25 | 51Mn | 53Mn |
26 | 52Fe | 53Fe |
27 | 53Co | 53Co |
28 | 54Ni | 53Ni |
29 | 55Cu | 53Cu |
30 | 56Zn | |
External data and identifiers
Last update: 2020-10-14
Perma link: https://www.chemlin.org/isotope/cobalt-53m
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