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Chromium-57

Properties and data of the isotope 57Cr.


Content

See also: list of Chromium isotopes.

 

General data

Name of the isotope:Chromium-57; Cr-57Symbol:57Cr or 5724CrMass number A:57 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:33Isotopic mass:56.9436124(11) u (atomic weight of Chromium-57)Nuclide mass:56.9304468 u (calculated nuclear mass without electrons)Mass excess:-52.52471 MeVMass defect:0.530130596 u (per nucleus)Nuclear binding energy:493.81346939 MeV (per nucleus)
8.6633942 MeV (average binding energy per nucleon)
Separation energy:SN = 5.3110(12) MeV (first neutron)
SP = 13.66(18) MeV (first proton)
Half-life:21.1(10) sDecay constant λ:0.032850577277723 s-1Specific activity α:3.53269292315 × 10+20 Bq g-1
9547818711.2297 Ci g-1
Spin and parity:
(nuclear angular momentum)
(3/2)-Magnetic dipole moment:μ(μN) = 0.0834Nuclear g-factor:gl = 0.0556Year of discovery:1978

 

Radioactive Decay

Half-life T½ = 21.1(10) s respectively 2.11 × 101 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
β-57Mn100 %4.9615(18) MeV

 

Parent Nuclides

Direct parent isotope is: 57V.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 33) and isobaric (same nucleon number A = 57) with Chromium-57. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 33Isobar A = 57
1649S
1750Cl
1851Ar
1952K
2053Ca57Ca
2154Sc57Sc
2255Ti57Ti
2356V57V
2457Cr57Cr
2558Mn57Mn
2659Fe57Fe
2760Co57Co
2861Ni57Ni
2962Cu57Cu
3063Zn57Zn
3164Ga
3265Ge
3366As
3467Se
3568Br
3669Kr

 

External data and identifiers

Adopted Levels, Gammas:NuDat 57Cr

 


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Last update: 2020-10-13


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