Localized electrostatic excitations in a Thomas–Fermi plasma containing degenerate electrons

Abdelsalam, U. M.; Moslem, W. M.; Shukla, P. K.
May 2008
Physics of Plasmas;May2008, Vol. 15 Issue 5, p052303
Academic Journal
By using the Thomas–Fermi electron density distribution for quantum degenerate electrons, the hydrodynamic equations for ions, and the Poisson equation, planar and nonplanar ion-acoustic solitary waves in an unmagnetized collisionless plasma are investigated. The reductive perturbation method is used to derive cylindrical and spherical Korteweg–de Vries equations. Numerical solutions of the latter are presented. The present results can be useful in understanding the features of small but finite amplitude localized ion-acoustic solitary pulses in a degenerate plasma.


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