中国物理B ›› 2007, Vol. 16 ›› Issue (9): 2644-2649.doi: 10.1088/1009-1963/16/9/025
高嵩1, 李洪云1, 林圣路1, 杨光参2
Gao Song(高嵩)a), Li Hong-Yun(李洪云)a), Yang Guang-Can(杨光参)b), and Lin Sheng-Lu(林圣路)a)†
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.
中图分类号: (Semiclassical methods)