High-energy $e^+e^-$ photoproduction cross section close to the end of spectrum

Details High-energy $e^+e^-$ photoproduction cross section close to the end of spectrum High-energy $e^+e^-$ photoproduction cross section close to the end of spectrum

2010-06-07

arxiv.org/abs/1006.1242v1

Phys. Rev. A vol. 82, 042106 (2010)

Physics

Atomic Physics

20 pages, 4 figures

Scientific paper

10.1103/PhysRevA.82.042106

We consider the cross section of electron-positron pair production by a high-energy photon in a strong Coulomb field close to the end of electron or positron spectrum. We show that the cross section essentially differs from the result obtained in the Born approximation as well as form the result which takes into account the Coulomb corrections under assumption that both electron and positron are ultrarelativistic. The cross section of bremsstrahlung in a strong Coulomb field by a high-energy electron is also obtained in the region where the final electron is not ultrarelativistic.

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