Bifurcation phenomena of photodetached electron flux in parallel external fields  

作　　者：高嵩 李洪云 杨光参 林圣路 

机构地区：[1]College of Physics and Electronics, Shandong Normal University, Jinan 250014, China [2]School of Physics and Electronic Information, Wenzhou University, Wenzhou 325027, China

出　　处：《Chinese Physics B》2007年第9期2644-2649,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos 10374061 and 90403028）. We thank Professor Du Meng-Li for some useful suggestions.

摘　　要：A semiclassical method based on the closed-orbit theory is applied to analysing the dynamics of photodetached electron of H- in the parallel electric and magnetic fields. By simply varying the magnetic field we reveal spatial bifurcations of electron orbits at a fixed emission energy, which is referred to as the fold caustic in classical motion. The quantum manifestations of these singularities display a series of intermittent divergences in electronic flux distributions. We introduce semiclassical uniform approximation to repair the electron wavefunctions locally in a mixed phase space and obtain reasonable results. The approximation provides a better treatment of the problem.A semiclassical method based on the closed-orbit theory is applied to analysing the dynamics of photodetached electron of H- in the parallel electric and magnetic fields. By simply varying the magnetic field we reveal spatial bifurcations of electron orbits at a fixed emission energy, which is referred to as the fold caustic in classical motion. The quantum manifestations of these singularities display a series of intermittent divergences in electronic flux distributions. We introduce semiclassical uniform approximation to repair the electron wavefunctions locally in a mixed phase space and obtain reasonable results. The approximation provides a better treatment of the problem.

关 键 词：photodetached electron flux bifurcation of classical orbits fold caustic semiclassical uniform approximation 

分 类 号：O45[理学—无线电物理]