Iron-53

Properties and data of the isotope ⁵³Fe.

Contents

General data

Name of the isotope:Iron-53; Fe-53Symbol:⁵³Fe or 5326FeMass number A:53 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:27Isotopic mass:52.9453056(18) u (atomic weight of Iron-53)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)Separation energy:S_N = 10.688(5) MeV (first neutron)
S_P = 7.5292(24) MeV (first proton)Half-life:8.51(2) minDecay constant λ:0.0013575150422247 s^-1Specific activity α:1.572143616107 × 10⁺¹⁹ Bq g^-1
424903680.02911 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-Magnetic dipole moment:μ(μ_N) = -0.65(1)Nuclear g-factor:g_l = -0.18571428571429Mirror nucleus:Cobalt-53Year of discovery:1938

Radioactive Decay

Half-life T_½ = 8.51(2) min (minutes) respectively 5.106 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β⁺	⁵⁴Mn	100 %	3.7426(17) MeV

Parent Nuclides

Direct parent isotope is: ⁵³Co.

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
^53mFe	3040.4(3) keV	2.54(2) min	19/2-

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-53. 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