Two-photon processes of annihilation and creation of electron-positron pairs. II. Kinetic equation for photons.

Details Two-photon processes of annihilation and creation of electron-positron pairs. II. Kinetic equation for photons. Two-photon processes of annihilation and creation of electron-positron pairs. II. Kinetic equation for photons.

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999afz....42..275n&link_type=abstract

Astrofizika, Tom 42, Vyp. 2, p. 275 - 294

Astronomy and Astrophysics

Astronomy

Radiative Transfer: Pair Creation, Radiative Transfer: Particle Creation

Scientific paper

A kinetic equation describing the evolution of photon gas is formulated. Annihilations and creations of electron-positron pairs and possible degeneration of gases are taken into account. The equation is written in a form of radiative transfer equation, absorption and emission coefficients are expressed in term of cross-sections of the processes. The coefficients are averaged in directions when particle distributions are isotropic. The cases when radiation field is isotropic or has a component proportional to cosine of angle with some direction are considered. Emitted spectrum, mean frequency and dispersion of photon frequencies are calculated.

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