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Cobalt-66m1

Properties and data of the isotope 66m1Co.


Contents

See also: list of Cobalt isotopes.

 

General data

Name of the isotope:Cobalt-66m1; Co-66m1Symbol:66m1Co or 66m127CoMass number A:66 (= number of nucleons)Atomic number Z:27 (= number of protons)Neutrons N:39Isotopic mass:65.939443(15) u (atomic weight of Cobalt-66m1)
Excitation energy: 175 keV
Nuclide mass:65.9246317 u (calculated nuclear mass without electrons)Mass excess:-56.40848 MeVMass defect:0.609764588 u (per nucleus)Nuclear binding energy:567.99205513 MeV (per nucleus)
8.60594023 MeV (average binding energy per nucleon)
Half-life:1.21(1) μsDecay constant λ:572848.90955367 s-1Specific activity α:5.307348961220 × 10+27 Bq g-1
1.434418638167 × 10+17 Ci g-1
Spin and parity:
(nuclear angular momentum)
(5+)

 

Radioactive Decay

Half-life T½ = 1.21(1) μs respectively 1.21 × 10-6 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
Iso

 

Nuclear Isomers

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

Nuclear IsomerExcitation EnergyHalf-lifeSpin
66Co0.20(2) s(3+)
66m2Co642 keV100 μs(8-)

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 39) and isobaric (same nucleon number A = 66) with Cobalt-66m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 39Isobar A = 66
2160Sc
2261Ti
2362V66V
2463Cr66Cr
2564Mn66Mn
2665Fe66Fe
2766Co66Co
2867Ni66Ni
2968Cu66Cu
3069Zn66Zn
3170Ga66Ga
3271Ge66Ge
3372As66As
3473Se66Se
3574Br66Br
3675Kr
3776Rb
3877Sr
3978Y
4079Zr
4281Mo

 

External data and identifiers

Adopted Levels, Gammas:NuDat 66Co

 


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Last update: 2020-10-14


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