Propagation and head-on collisions of ion-acoustic solitons in a Thomas-Fermi magnetoplasma: Relativistic degeneracy effects
- Department of Physics, Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, 51745-406 Tabriz (Iran, Islamic Republic of)
Small amplitude propagation and quasielastic head-on collision of ion-acoustic solitary waves (IASWs) are investigated in a degenerate Thomas-Fermi electron-positron-ion magnetized plasma using extended Poincare-Lighthill-Kuo reductive perturbation method for both ultrarelativistic and nonrelativistic electron/positron degeneracy cases. It is observed that both bright- and dark-type solitary shapes can exist in such plasma, depending on two critical values. The shape of ion-acoustic solitary structures as well as sign of their collision phase shifts are both determined by the same critical values. It is further revealed that relativistic degeneracy of electrons/positrons has significant effect on the propagation as well as interaction of IASWs.
- OSTI ID:
- 21389091
- Journal Information:
- Physics of Plasmas, Vol. 17, Issue 7; Other Information: DOI: 10.1063/1.3449590; (c) 2010 American Institute of Physics; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COLLISIONS
ELECTRONS
ION ACOUSTIC WAVES
PERTURBATION THEORY
PHASE SHIFT
POSITRONS
RELATIVISTIC PLASMA
SOLITONS
THOMAS-FERMI MODEL
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ATOMIC MODELS
ELEMENTARY PARTICLES
FERMIONS
ION WAVES
LEPTONS
MATHEMATICAL MODELS
MATTER
PLASMA
PLASMA WAVES
QUASI PARTICLES