The Effects Of Several Environments With Interfaces On The Photodetachment Of Hydrogen Negative Ions

This paper mainly explores the photodetachment of the hydrogen negative ion in a two-dimensional isosceles right triangle cavity,and near a moving wall in a static electric field.First,the method of quantum mechanics and closed orbit theory was used to explore the photodetachment of hydrogen negative ions in a two-dimensional isosceles right triangle cavity.For the quantum mechanics method,based on the energy eigenvalues and eigenfunctions in the two-dimensional isosceles right triangle,the corresponding expressions of the photodetachment cross section in the interface environment are obtained;for the closed orbit theory,firstly,the isosceles right triangle was two-dimensionally densely packed,all closed orbits were found,and the corresponding expressions of the photodetachment cross section were obtained.The photodetachment cross section images under the two methods can be superimposed together,and the overall performance is fluctuating around σ₀.Next,the closed orbit theory method was used to explore the photodetachment of the hydrogen negative ions near the moving wall when the direction of the static electric field was vertical upward.The closed orbits of the electrons change with the increase initial energy in this interface environment,and three types of closed orbits appear,and these three types of closed orbit appear separately with increasing initial energy.In the research,it was first proposed that when the instantaneous momentum k_ac before the collision between the electron and the moving wall satisfies v＜k_ac＜2v,the motion state of the electron after the collision with the moving wall.Then,the closed orbit theory method was utilized to explore the photodetachment of the hydrogen negative ions near the moving wall when the direction of the static electric field was vertical downward.The electronic orbit appears the phenomenon of orbital bifurcation in this interface environment.By derivation,the formula of the photodetachment cross section under the interface environment is obtained.It is struck from the expression that the orbit bifurcation and the photodetachment cross section are related to the initial distance of the hydrogen negative ion to the moving wall,the speed of the moving wall,and the magnitude of the static electric field force.Therefore,the influence of the orbit bifurcation on the photodetachment cross section was further discussed.Finally,a brief discussion and summary were carried out.