Propagation and oblique collision of electron-acoustic solitons in two-electron-populated quantum plasmas |
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Authors: | M AKBARI-MOGHANJOUGHI N AHMADZADEH-KHOSROSHAHI |
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Institution: | 1.Faculty of Science, Department of Physics,Azarbaijan University of Tarbiat Moallem,Tabriz,Iran;2.Islamic Azad University, Hadishahr Branch,Hadishahr,Iran |
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Abstract: | 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
Poincaré–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 collision angles 0 < θ < π. |
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