مشخصات پژوهش

In this work , we use the conven tional hydrody namics formalism and incorp orate the ChewGoldberg er-Low double-adiaba tic theory to evaluat e the nonli near electrost atic ion excitations in double-degen erate (electr on spin -orbit degene rate) magnetized quantum plasmas. Based on the Sagdeev pseudopoten tial method, an exact general pseudopotential is calculated wh ich leads to the allowed Mach-number range criter ia for such localized densi ty structures in an anisotrop ic magnetized plasma. We employ the criteria on the Mach-number range for diverse magnetized quantum plasma with different equatio ns of state. It is remarked that various plasma fractional parameters such as the system dimension ality, ion-temperature, relativistic-de generacy, Zeemanenergy, and plasma composition are inv olved in the stability of an obliquely propagating nonlinear ion-acoustic wave in a double-degen erate quantum pla sma. Current study is most appropriate for nonlinear wave analys is in dense as trophysical magnetized plasma environments such as whitedwarfs and neutron- star cru sts where the strong magnetic fields can be present.