Resonant electron-positron pair photoproduction on a nucleus in a pulsed light field |
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Authors: | A A Lebed’ and S P Roshchupkin |
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Abstract: | The resonant photoproduction of an electron-positron pair on a nucleus in the field of a pulsed light wave is studied theoretically.
The approximation where the electromagnetic pulse duration is much longer than the characteristic time of wave oscillations
is considered. The interaction of the electron and positron with the Coulomb potential of the nucleus is considered in the
Born approximation. An analytical expression for the resonant differential cross section is derived for the range of moderately
strong external fields. This cross section contains a resonant peak whose height and width are determined by the external
pulsed wave characteristics. The resonant cross section for pair photoproduction on a nucleus in a pulsed laser field can
exceed the corresponding cross section for pair photoproduction on a nucleus in the absence of an external field by an order
of magnitude. |
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