Propagation and oblique collision of electron-acoustic solitons in two-electron-populated quantum plasmas

Details Propagation and oblique collision of electron-acoustic solitons in two-electron-populated quantum plasmas Propagation and oblique collision of electron-acoustic solitons in two-electron-populated quantum plasmas

2011-02-10

arxiv.org/abs/1102.2059v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted: Pramana Journal of Physics

Scientific paper

Oblique interaction of small- but finite-amplitude KdV-type electron-acoustic solitary excitations is examined in an unmagnetized two-electron-populated degenerate quantum electron-ion plasma in the framework of quantum hydrodynamics model using the extended Poincar\'{e}-Lighthill-Kuo (PLK) perturbation method. Critical plasma parameter is found to distinguish the types of solitons and their interaction phase-shifts. It is shown that, depending on the critical quantum diffraction parameter $H_{cr}$, both compressive and rarefactive solitary excitations may exist in this plasma and their collision phase-shifts can be either positive or negative for the whole range of the collision angle $0<\theta<\pi$.

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