Study For The Different Geometry Triple-Differential Cross-section Of Laser Fields

In recent years,the scattering problem has been widely concerned.The collision reactions in scattering are divided into three types,elastic scattering,inelastic scattering and reaction.We mainly study the laser field assisted(e,2e)reaction.In this thesis,we study the process of ionization of the ground state hydrogen atom by a single electron collision.The Born approximation method is used to derive the calculation.Select a weak laser field,When the laser field is weak enough,we can think that the hydrogen atom is not affected.According to the image to determine the influence of the laser field on the DTCS image.There are two peaks in the reaction,which are called binary peak and recoil peak.In the process of reaction,the change of recoil peak is complex,we do not compare,only discuss the change of binary peak.Under the condition of coplanar asymmetric geometry,we find that the laser field has a certain influence on the binary peak in the TDCS two-dimensional images.The paper uses the control variable method.First of all,to control the other parameters unchanged;then,changing the scattering angle,ejected electron energy,effective charge number size;finally,change and difference were observed when the laser field binary peak,in order to determine the influence of different parameters on the change of binary peak.In this paper,we also discuss the simulation of 3D image under non coplanar asymmetric geometry.However,only two different directions of the laser field image are discussed.The control variable method is adopted,and the influence of the laser field on the binary peak is judged by the contrast of the image,and the influence of the different parameters on the binary peak is also discussed.It can be seen from the experimental results that the laser field obviously affects the spatial distribution of electrons.When the hydrogen atom is in the ground state,the peak value of binary peak is changed after the laser field is added.When the single parameter is changed,the peak value of the binary peak is sometimes suppressed and sometimes increased.