Odd Co Isotopes in a Unified Vibrational Model
Kenneth W. StewartDepartment of Physics, University of Manchester, Manchester, EnglandB. CastelPhysics Department, Queen's University, Kingston, CanadaB. P. SinghPhysics Department, Queen's University, Kingston, Canada
1971en
ABI
Abstract
The odd-$A$ Co isotopes are studied in a version of the unified vibrational model which incorporates both anharmonic and quasiparticle effects. With the ${p}_{\frac{1}{2}}$, ${p}_{\frac{3}{2}}$, ${f}_{\frac{5}{2}}$, and ${f}_{\frac{7}{2}}$ orbitals available, quasihole states are coupled to anharmonic vibrations of the corresponding Ni cores. Very good agreement is obtained with the known properties of $^{57\ensuremath{-}59}\mathrm{Co}$ in a one-parameter fit, while the $^{61\ensuremath{-}63}\mathrm{Co}$ calculations are essentially parameter free. The systematics of the energy levels of $^{57\ensuremath{-}63}\mathrm{Co}$ can also be explained well by the model.
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