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Iron-52m

Properties and data of the isotope 52mFe.


Contents

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) keV
Nuclide 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-1
Spin and parity:
(nuclear angular momentum)
12+

 

Radioactive Decay

Half-life T½ = 45.9(6) s respectively 4.59 × 101 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
β+53Mn
Iso52Fe

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
52Fe8.275(8) h0+

 

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.

 

ZIsotone N = 26Isobar A = 52
1137Na
1238Mg
1339Al
1440Si
1541P
1642S
1743Cl
1844Ar52Ar
1945K52K
2046Ca52Ca
2147Sc52Sc
2248Ti52Ti
2349V52V
2450Cr52Cr
2551Mn52Mn
2652Fe52Fe
2753Co52Co
2854Ni52Ni
2955Cu
3056Zn

 

External data and identifiers

Adopted Levels, Gammas:NuDat 52Fe

 


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Last update: 2020-10-13


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