Effect Of Elastic Cavities And Harmonic Oscillator Potential On Photodetachment

In this thesis,the photodetachment processes of hydrogen negative ion are investigated in an equilateral triangular cavity,a vertical elastic interface cavity and a linear harmonic oscillator potential respectively,comparing the quantum results with ones of the closed orbit theory.The cross section in this thesis indicates the photodetachment cross section of hydrogen negative ion.First of all,the research background is introduced briefly.And we take the photodetachments of hydrogen negative ion near a single interface,the parallel plate cavity,the open cavity and the equilateral triangular cavity as examples to illustrate the research progress of photodetachment.However,it can be noted that the progress in an open cavity has been researched by closed orbit theory without the quantum result.And there is only the quantum research of the photodetachment in the equilateral triangular cavity.Then,the photodetachment cross section of hydrogen negative ion inside a tube cavity with an equilateral triangle cross section is investigated by closed orbit theory,which is introduced in detail.At the same time,the results are compared with ones of the quantum.In addition,the photodetachments of hydrogen negative ion near two perpendicular elastic planes and in the harmonic oscillator potential field the cross section near two perpendicular elastic planes were investigated by quantum approach and closed orbit theory.In particular,we calculate the cross sections in coordinate representation and momentum representation in the traditional quantum approach.There is the similar oscillation structure in the two cross sections and the oscillation structure which depend on the photon polarization direction for the above three systems.Finally,the simple summary is given.