Research Of The Photodetachment Process Of H~-in An Equilateral Triangle Cavity

In this paper, the photodetachment cross section of negativehydrogen ion in an equilateral triangle cavity is investigated bytraditional quantum approach. The analytical formula as a function ofphotonenergy is derived. The threshold behavior is also given in thecross sections. Furtherly, If the negative hydrogen ion is placed nearone corner of the equilateral triangle, the quantum results showagreement with those of closed-orbit theory when the negativehydrogen ion is in an wedge with an opening angle of60degrees.In Chapter1, we introduce the related research background of thephotodetachment of negative ions.In Chapter2, we introduce Guang-can Yang and study thephotodetachment cross section of negative hydrogen ion near elasticwall by traditional quantum approach. We calculate thephotodetachment cross section by the final state wave function of thephotodetachment electrons under cylindrical coordinate systemtransformation in spherical coordinates. However, we carry the finalstate wave function of the photodetachment electrons in therectangular coordinate system to study the process ofphotodetachment cross section of negative hydrogen ion near elastic wall. This method is also the quantum approach to calculate thephotodetachment cross section in the chapter3.In Chapter3, the photodetachment cross section of negativehydrogen ion in an equilateral triangle cavity is investigated bytraditional quantum approach. We calculate three polarizationdirection of the scattering cross section of the photodetachmentelectrons in the rectangular coordinate system. Comparing with thephotodetachment cross section in free space, we find that the longerthe equilateral triangle cavity length is, the negative hydrogen ion iscloser to the centre of x、y’s plane in the equilateral triangle cavity,and the photodetachment cross section oscillates more fiercely. It’smore similar with the case in free field.In Chapter4, we study the negative hydrogen ion in the open cavitywith an opening angle of60degrees of photodetachment process bythe closed orbit method, and obtain two independent polarizationdirection of photodetachment cross section. We compare thephotodetachment cross section of negative hydrogen ion by quantumapproach in the equilateral triangle cavity with photodetachmentcross section by the closed orbit method in the chapter3, and make adetail explanation.In Chapter5, we give a short summary.