Iron-52m
Properties and data of the isotope 52mFe.
See also: list of Iron isotopes.
General data
Name of the isotope:Iron-52m; Fe-52mSymbol:52mFe or 52m26FeMass number A:52 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:26Isotopic mass:51.948115(5) u (atomic weight of Iron-52m)
Excitation energy: 6958.0(4) keVNuclide mass:51.9338523 u (calculated nuclear mass without electrons)Mass excess:-48.33057 MeVMass defect:0.480623648 u (per nucleus)Nuclear binding energy:447.69804437 MeV (per nucleus)
8.60957778 MeV (average binding energy per nucleon)Half-life:45.9(6) sDecay constant λ:0.015101245763833 s-1Specific activity α:1.783173120594 × 10+20 Bq g-1
4819386812.4178 Ci g-1Spin and parity:
(nuclear angular momentum)12+
Radioactive Decay
Half-life T½ = 45.9(6) s respectively 4.59 × 101 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β+ | 53Mn | | | |
Iso | 52Fe | | | |
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 |
---|
52Fe | | 8.275(8) h | 0+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 26) and isobaric (same nucleon number A = 52) with Iron-52m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 26 | Isobar A = 52 |
11 | 37Na | |
12 | 38Mg | |
13 | 39Al | |
14 | 40Si | |
15 | 41P | |
16 | 42S | |
17 | 43Cl | |
18 | 44Ar | 52Ar |
19 | 45K | 52K |
20 | 46Ca | 52Ca |
21 | 47Sc | 52Sc |
22 | 48Ti | 52Ti |
23 | 49V | 52V |
24 | 50Cr | 52Cr |
25 | 51Mn | 52Mn |
26 | 52Fe | 52Fe |
27 | 53Co | 52Co |
28 | 54Ni | 52Ni |
29 | 55Cu | |
30 | 56Zn | |
External data and identifiers
Last update: 2020-10-13
Perma link: https://www.chemlin.org/isotope/iron-52m
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