Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-07-21
Physics
High Energy Physics
High Energy Physics - Phenomenology
Invited talk given at the Conference "Channeling 2006", Frascati, Italy
Scientific paper
10.1117/12.741824
The process of radiation from high-energy electron and electron-positron pair production by a photon in oriented single crystal is considered using the method which permits inseparable consideration of both coherent and incoherent mechanisms of photon emission from an electron and of pair creation by a photon and includes the action of field of axis (or plane) as well as the multiple scattering of radiating electron or particles of the created pair (the Landau-Pomeranchuk-Migdal (LPM) effect). The total intensity of radiation and total probability pair creation are calculated. The theory, where the energy loss of projectile has to be taken into account, and found probabilities of pair creation agree quite satisfactory with available CERN data. From obtained results it follows that multiple scattering appears only for relatively low energy of radiating electron or a photon, while at higher energies the field action excludes the LPM effect.
Baier V. N.
Katkov V. M.
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