Iron-53m

Properties and data of the isotope ^53mFe.

Contents

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

General data

Name of the isotope:Iron-53m; Fe-53mSymbol:^53mFe or 53m26FeMass number A:53 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:27Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.0384615384615 (= neutron-proton ratio)Neutron excess (N-Z):1Excitation energy:3040.4(3) keVIsotopic mass:52.9453056(18) u (atomic weight of Iron-53m)Nuclide mass:52.9310429 u (calculated nuclear mass without electrons)Mass excess:-50.94751 MeVMass defect:0.492097964 u (per nucleus)Nuclear binding energy:458.38630088 MeV (per nucleus)
8.64879813 MeV (average binding energy per nucleon)Half-life:2.54(2) minDecay constant λ:0.0045482098461939 s^-1Specific activity α:5.267300068140 × 10⁺¹⁹ Bq g^-1
1423594613.0109 Ci g^-1Spin and parity:
(nuclear angular momentum)19/2-

Radioactive Decay

Half-life T_½ = 2.54(2) min (minutes) respectively 1.524 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	⁵³Fe	100 %

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
⁵³Fe		8.51(2) min	7/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 27) and isobaric (same nucleon number A = 53) with Iron-53m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 27	Isobar A = 53
11	³⁸Na
12	³⁹Mg
13	⁴⁰Al
14	⁴¹Si
15	⁴²P
16	⁴³S
17	⁴⁴Cl
18	⁴⁵Ar	⁵³Ar
19	⁴⁶K	⁵³K
20	⁴⁷Ca	⁵³Ca
21	⁴⁸Sc	⁵³Sc
22	⁴⁹Ti	⁵³Ti
23	⁵⁰V	⁵³V
24	⁵¹Cr	⁵³Cr
25	⁵²Mn	⁵³Mn
26	⁵³Fe	⁵³Fe
27	⁵⁴Co	⁵³Co
28	⁵⁵Ni	⁵³Ni
29	⁵⁶Cu	⁵³Cu
30	⁵⁷Zn
31	⁵⁸Ga
32	⁵⁹Ge