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The ground state properties of the spherical nucleus ~(40)Ca have been investigated by using constrainedspherical Hartree-Fock (CSHF) approximation at equilibrium and under high radial compression in a six major shells.The effective baryon-baryon interaction that includes the Δ(1236) resonance freedom degrees to calculate nuclear propertiesis used.The nucleon-nucleon (N-N) interaction is based on Reid soft core (RSC) potential.The results of calculationsshow that much of increase in the nuclear energy generated under compression is used to create the massive A particles.The number of Δ's can be increased to about 2.1% of constituents of nucleus when nuclear density reaches about 1.34times of normal density.The single particle energy levels are calculated and their behavior under compression is alsoexamined.A good agreement has been found between current calculations and phenomenological shell model for lowlying single-particle spectra.The gap between shells is very clear and L-S coupling become stronger as increasing thestatic load on the nucleus.The results show a considerable reduction in compressibility when freedom degrees of Δ's aretaken into account.It has been found that the total nuclear radial density becomes denser in the interior and less densein the exterior region of nucleus.The surface of nucleus becomes more and more responsive to compression than outerregion.
The ground state properties of the spherical nucleus ~ (40) Ca have been investigated by using constrained spherical open-loop Hartree-Fock (CSHF) approximation at equilibrium and under high radial compression in a six major shells. The effective baryon-baryon interaction that includes the Δ 1236) resonance freedom degrees to calculate nuclear propertiesis used. The nucleon-nucleon (NN) interaction is based on Reid soft core (RSC) potential. These results of calculationsshow that much of increase in the nuclear energy generated under compression is used to create the massive A particles. The number of Δ can be increased to about 2.1% of constituents of nucleus when nuclear density reaches about 1.34 times normal density. The single particle energy levels are calculated and their behavior under compression is also extruded. A good agreement has been found between current calculations and phenomenological shell model for lowlying single-particle spectra. The gap between shells is very clear and LS coup ling has become found as the increase in static load on the nucleus. the results show a considerable reduction in compressibility when freedom degrees of freedom's of Δ's aretaken into account. It has been found that the total nuclear radial density becomes denser in the interior and less dense in the exterior region of nucleus.The surface of nucleus becomes more and more responsive to compression than outerregion.