Turkish Journal of Physics
DOI
10.3906/fiz-1402-4
Abstract
The spherical Hartree-Fock approximation is applied to a no-core shell model with a realistic effective baryon-baryon interaction. The ground state properties of a heavy spherical neutron-rich doubly magic ^{208}Pb nucleus under compression are investigated. It is found that the nucleus becomes more bound with the occurrence of Delta resonances. The creation of Delta increases as the compression is continuous. There is a considerable reduction in the compressibility when the Delta degree of freedom is activated. It is found that the Delta particle is the basic component of the ^{208}Pb nucleus besides nucleons at the ground state without any compression. When the nucleus is compressed to about 4.31 times the ordinary density, the Delta component is sharply increased to about 14.4% of all baryons in the system. It is found that there is a radial density distribution for Delta at the ground state of ^{208}Pb nucleus without any compression. The single particle energy levels are calculated and their behaviors are examined under compression too. A good agreement was obtained between the results of the effective Hamiltonian and the phenomenological shell model for the low lying single-particle spectra.
Keywords
Nuclear structure, compressed finite nuclei, Delta-resonance, Hartree-Fock method, shell model, heavy spherical doubly magic ^{208}Pb nucleus
First Page
253
Last Page
260
Recommended Citation
ABU-SEI'LEEK, MOHAMMED HASSEN EID
(2014)
"Neutron-rich ^{208}Pb nucleus with delta excitation under compression,"
Turkish Journal of Physics: Vol. 38:
No.
2, Article 12.
https://doi.org/10.3906/fiz-1402-4
Available at:
https://journals.tubitak.gov.tr/physics/vol38/iss2/12
