On the time scales of the pair production processes in astrophysics,

Details On the time scales of the pair production processes in astrophysics, On the time scales of the pair production processes in astrophysics,

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...110l...7z&link_type=abstract

Astronomy and Astrophysics, vol. 110, no. 2, June 1982, p. L7-L10.

Astronomy and Astrophysics

Astrophysics

18

Black Holes (Astronomy), Electron-Positron Pairs, Pair Production, Particle Collisions, Relativistic Plasmas, Astrophysics, Optical Thickness, Plasma Temperature, Time Response

Scientific paper

The problem of positron-electron pair production by photon-photon, photon-particle, and particle-particle collisions in spherically symmetric accretion onto a black hole is examined. It is shown that these processes are much two slow to lead to any appreciable pair density in an optically thin accretion flow. The rates of pair production in binary particle collisions are calculated, and it is shown that the ep-epe(+)e(-) process is by one order of magnitude slower than the ee-eee(+)e(-) process. In addition, the maximum temperature of a stationary plasma with tau approaching zero is lower than that previously calculated by Bisnovatyi-Kogan et al. (1971).

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