Resonant parametric interference effect in spontaneous bremsstrahlung of an electron in the field of a nucleus and two pulsed laser waves

摘要

Resonant spontaneous bremsstrahlung of an electron scattered by a nucleus inthe field of two moderately strong pulsed laser waves is studied theoretically.The process is studied in detail within the interference kinematic region. Thisregion is determined by scattering of particles in the same plane atpredetermined angles, at that stimulated absorption and emission of photons ofexternal pulsed waves by an electron occurs in correlated manner. Thecorrespondence between the emission angle and the final-electron energy isestablished in the kinematic region where the resonant parametric interferenceeffect is manifested. The resonant differential cross section of ENSB processwith simultaneous registration of both emission angles of the spontaneousphoton and the scattered electron, can exceed by 4-5 orders of magnitude thecorresponding cross section in the absence of an external field. It was shownfor nonrelativistic electrons that the resonant cross section of ENSB in thefield of two pulsed laser waves within the interference region in two order ofmagnitude may exceed corresponding cross section in the Bunkin-Fedorovkinematic region. The obtained results may be experimentally verified, forexample, by scientific facilities at sources of pulsed laser radiation (SLAC,FAIR, XFEL, ELI).