مشخصات پژوهش

In this paper, we use the collisio nal quantum magnet ohydrodynamic (CQMHD ) model to derive the transverse dielectr ic function of a relativistically degenerate electron fluid and investigate various opt ical parameters, such as the complex refracti ve index, the reflection and absorption coefficients, the skin -depth and optical conductivity. In this model we take into accounts effects of many parameters such as the atomic-number of the constituent ions, the electron exchange, electron diffraction effect and the electron-ion collisions . Study of the optical parameters in the solid-densit y, the warm-den se-matter, the big-p lanetary core, and the compact star number- density regimes reveals that there are distinct differences between optical characteristics of the latter and the former cas es due to the fundamental effects of the relativ istic degeneracy and oth er quantum mechanisms. It is found that in the relativ istic degene racy plasma reg ime, such as found in whitedwarfs and neutron star crusts, matter possess a mu ch sharper and well-defined step-li ke reflection edge beyond the x-ray electromagneti c spectrum, including som e part of gamma-ray frequencies. It is also remarke d that the magnetic field intensity only s ignificantly affects the plasma reflectivity in the lower number-densi ty regime, rather than the hig h densi ty limit. Current investigation confirms the profound effect of relativ istic degeneracy on optical characteristics of matter and can pr ovide an impo rtant plasma diagnost ic tool for studyin g the physical processes within the wide s cope of quantum plasma reg imes be it the solid-densit y, inerti al-confined, or astroph ysical compact stars.