Compton Scattering, Pair Annihilation and Pair Production in a Plasma

Details Compton Scattering, Pair Annihilation and Pair Production in a Plasma Compton Scattering, Pair Annihilation and Pair Production in a Plasma

1999-11-09

arxiv.org/abs/astro-ph/9911136v1

Proceeding IAU Symposium, 195

Astronomy and Astrophysics

Astrophysics

8 pages tex files including figures

Scientific paper

The square of the four momentum of a photon in vacuum is zero. However, in an unmagnetized plasma it is equal to the square of the plasma frequency. Further, the electron-photon coupling vertex is modified in a plasma to include the effect of the plasma medium. I calculate the cross sections of the three processes - the Compton scattering, electron-positron pair annihilation and production in a plasma. At high plasma densities, the cross sections are found to change significantly. Such high plasma densities exist in several astrophysical sources.

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