Study For Triple-Differential Cross-Section Of Ground Helium Atom In Ellipse Laster Field

Quantum mechanics has attracted much attention in recent years.The study of scattering phenomena in quantum mechanics is also very important.The(e,2e)reaction in scattering theory is the simplest case.It refers to the collision of incident electrons with the target particles.The electrons of one electron orbit in the target particle are ionized,so that the two electrons are emitted.This paper mainly studies the(e,2e)reaction under the elliptical laser field.The select target particles is ground-state helium atoms,Confluent hypergeometric function using a spherical harmonic function under a first-order Born approximation,and calculate the free field separately.The elliptical laser field has no Stark effect and the corresponding transition matrix element with stark effect.In the case of free field,the incident electron energy is 1000eV,the Touching electron energy is5eV,8eV,11eV,and the incidence angle is 4~°,8~°,12~°.The effective charge number is a fixed value.The choice of elliptical laser field is?and?.The direction of?is along the direction of the incident electron,and the direction of?along momentum transfer direction.The influence of each physical quantity on the triple differential scattering cross section(TDCS)is analyzed by the control variable method.Through theoretical calculation and analysis of TDCS,we can see that the binary peak of ground state helium atom is suppressed with the increase of parameters under the condition of free field,and they just under the different degrees of suppression.In the range of momentum transfer,the intensity of the elliptical laser field has a certain influence on the binary peak without Stark effect,but the effect is not significant.The collision electron energy E and scattering angle?have a significant compression effect on the binary peak.But the effect of effective charge number?on the peak value of binary is not obvious.On the horizontal axis?along the direction of increasing migration,the migration amount is large,and the migration effect is obvious.When the elliptical laser field has Stark effect,the binary peaks are split.Some have double peaks and others have three peaks.The effective charge number will suppress the binary peak.With the changing of?,the peak value will be greatly affected.With the increasing of the scattering angle?,the two larger peaks will also increase.The collision of electron energy will reduce the horizontal distance between the left and right peaks of the binary peak.With the increasing of E,the splitting of the binary peak will disappear.The intensity of the laser field will lead the binary peak to split.The peak value between two larger peaks will decreases with the increasing of laser field intensity,and the horizontal distance between the two peaks will gradually decreases.