Bifurcation phenomena of photodetached electron flux in parallel external fields
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)†
a College of Physics and Electronics, Shandong Normal University, Jinan 250014, China; b School of Physics and Electronic Information, Wenzhou University, Wenzhou 325027, China
Abstract 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.
Received: 24 February 2006
Revised: 19 March 2007
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 10374061 and
90403028).
Cite this article:
Gao Song(高嵩), Li Hong-Yun(李洪云), Yang Guang-Can(杨光参), and Lin Sheng-Lu(林圣路) Bifurcation phenomena of photodetached electron flux in parallel external fields 2007 Chinese Physics 16 2644
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