Temporal evolution of electron-positron plasmas

Details Temporal evolution of electron-positron plasmas Temporal evolution of electron-positron plasmas

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aipc..101..368b&link_type=abstract

IN: Positron-electron pairs in astrophysics; Proceedings of the Workshop, Greenbelt, MD, January 6-8, 1983 (A85-31276 13-90). Ne

Astronomy and Astrophysics

Astrophysics

1

Electron Plasma, Electron-Positron Plasmas, High Energy Interactions, Magnetohydrodynamic Stability, Plasma Radiation, Positron Annihilation, Relativistic Plasmas, Astronomical Models, Boltzmann Transport Equation, Emission Spectra, Fokker-Planck Equation, Thermodynamic Equilibrium

Scientific paper

The investigation of the temporal evolution of an optically thin nonrelativistic electron-positron plasma is discussed. Estimates of the thermalization time scale and the radiation properties of the plasmas are considered. The pair plasma evolves rapidly towards a thermal equilibrium configuration and then, on a much longer time scale, annihilates. It is shown that pair annihilation processes do not influence the temporal evolution of the plasmas, due to the short thermalization time scale and the fact that the annihilation cross section is nearly energy-independent. The emitted photon spectrum is found to differ at first from a thermal behavior, but soon becomes undistinguishable from it.

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