Photodetachment dynamics near an attractive Coulomb center

Abstract

This article studies the photodetachment of a single electron anion near an attractive center.Both the differential and total photodetachment cross section are analysed. We obtain the electron flux crossing through a spherical detector centered at the force center using the semiclassical approximation. The closed-orbit theory gives the total cross section which contains a smooth background and an oscillatory part. Concrete calculations and discussions are carried out for two types of wave source: the s-and p z -wave source. Photodetachment processes for three conditions are compared: an anion near an attractive center, near a repulsive center and in a homogeneous electric field.

Closed-orbit theory for the photodetachment rate in a static magnetic field transversely superimposed to an oscillatory electric field

“…In appendix A, a detailed calculation of the photodetachment rate using the semiclassical approximations is shown. It has been well established, and demonstrated in many systems [23,[42][43][44], that each closed classical trajectory, i.e. closed orbits, contributes with an oscillatory term for the total photodetachment cross section in external fields [7,[12][13][14].…”

Quantum photodetachment of hydrogen negative ion in a harmonic potential subjected to static electric field

“…However, despite the significant role of potential-well problems in the understanding of many phenomena of fundamental nature and practical implications in atomic physics, nuclear physics, molecular physics, and quantum physics, photodetachment of H − near potentials is rarely studied, with few recent exceptions. [22][23][24][25][26] A quantum-semiclassical comparative study of photodetachment of H − in a one-dimensional linear harmonic potential has been recently presented by Zhao et al, [22] both in position and momentum coordinates. The authors employed standard semiclassical COT and frametransformation-theory of quantum mechanics for the study.…”