Triply-differential Cross Section For Electron-impact Ionization Of Helium In Polarized Light

Quantum scattering is used to study of the motion law of microscopic particlesinteract with one another, and the internal structure of the atom method. quantumscattering is an important content in quantum mechanics. in theory, the scatteringpattern is a nonbound state, so when it subjected to a continuous part of system, wecan control the energy of incident particles, in other words we can the eigenvalueand eigenstates of discrete particles.We study triply-differential cross for ionization Helium by electron in ellipsepolarized light using the first Born approximation under Weigold geometriccondition. We choose that the energy of incident electron is1000eV, the energy ofejected-electron is about512eV and scattering angles is37; the directionof laser field in x axis xis taken to be parallel to that of the incident electron, anddirection of laser field in y axis yis taken to be parallel to the momentum transfer.We can study the triply-differential cross sections when the above parameters vary.In field-free, when incident electron energy, ejected-electron energy and scatteringangles are fixed, however, effective charge of Helium changes, the triply differentialcross sections has an obvious change. Both binary peak and recoil peak aresuppressed obviously. We also know in field-free, when incident electron energy,ejected-electron energy and effective charge are fixed, however, scattering anglechanges, the triply-differential cross has changed obviously, binary peak issuppressed, while recoil peak is almost not change.When the intensity of laser field yis much larger than x, binary peek ismore enhanced, recoil peek is more suppressed and it will disappear finally. Whilewhen the intensity of laser field yis much less than x, binary peek and recoilpeek has changed more complex, and the symmetry of the triple differential crosssection is broke. In this paper, we study the TDCS in field-free and laser field, wefind that the peak value is related to the momentum transfer value.. Whenmomentum transfer value is less than0.5, the peak value in field-free is larger than that in laser field, i.e, laser field make the binary peak and recoil peak suppressed.This paper we also analyzed influence of the Stark effect on triple differentialscattering cross section, and the laser field studys the triple differential scatteringcross section which is produced by0and0, finding that the triple differentialscattering cross section becomes more complex.