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Isospin Breaking Effects in Finite Nuclei
U. T. Yakhshiev 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.5
The isospin breaking effects in finite nuclei and, in particular, in magic nuclei are studied in the framework of the in-medium modified Skyrme model. During the studies, the phenomenological data in the mesonic sector are taken as an input in order to reproduce the isospin breaking effects in the baryonic sector. We have considered some representatives of light, middle-heavy and heavy nuclei. Within the present approach, the neutron-proton mass difference in a finite nucleus is shown to be opposite to its value calculated in the mirror partner of that nucleus.
Neutron star structure in an in-medium modified chiral soliton model
North-Holland Pub. Co 2015 Physics letters. Section B Vol.749 No.-
We study the internal structure of a static and spherically symmetric neutron star in the framework of an in-medium modified chiral soliton model. The Equations of State describing an infinite and asymmetric nuclear matter are obtained introducing the density dependent functions into the low energy free space Lagrangian of the model starting from the phenomenology of pionic atoms. The parametrizations of density dependent functions are related to the properties of isospin asymmetric nuclear systems at saturation density of symmetric nuclear matter ρ<SUB>0</SUB>~0.16 fm<SUP>-3</SUP>. Our results, corresponding to the compressibility of symmetric nuclear matter in the range 250 MeV@?K<SUB>0</SUB>@?270 MeV and the slop parameter value of symmetry energy in the range 30 MeV@?L<SUB>S</SUB>@?50 MeV, are consistent with the results from other approaches and with the experimental indications. Using the modified Equations of State, near the saturation density of symmetric nuclear matter ρ<SUB>0</SUB>, the extrapolations to the high density and highly isospin asymmetric regions have been performed. The calculations showed that the properties of ~1.4M<SUB>@?</SUB> and ~2M<SUB>@?</SUB> neutron stars can be well reproduced in the framework of present approach.
In-medium modified π-ρ-ω mesonic Lagrangian and properties of nuclear matter
Jung, J.H.,Yakhshiev, U.T.,Kim, H.-Ch. North-Holland Pub. Co 2013 Physics letters: B Vol.723 No.4
We investigate the bulk properties of symmetric nuclear matter within the framework of an in-medium modified chiral solitonic model with π, ρ and ω mesons. We consider the modification of meson degrees of freedom in nuclear matter, based on phenomenology of pion-nucleus scattering and the empirical nuclear mass formula. We discuss the results of the density dependence of the volume term in the mass formula and the incompressibility of symmetric nuclear matter, comparing them with relativistic mean-field models. The mass dropping of the ρ meson in nuclear matter is also obtained and discussed.