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Photodetachment near a repulsive center: Closed-orbit theory for the total cross section

Authors :
M. L. Du
Bo-Wen Yang
John B. Delos
Source :
Physical Review A. 89
Publication Year :
2014
Publisher :
American Physical Society (APS), 2014.

Abstract

The total photodetachment cross section of a negative ion near a repulsive center is studied based on the closed-orbit theory. An analytical expression, written as a product of the zero-field photodetachment cross section and a modulation function, is obtained for energy above and below threshold. The expression also incorporates the different wave sources produced by different negative ions. The present results are shown to be accurate by comparing with quantum calculations based on the exact Coulomb Green's function. We also compared the photodetachment cross section near a repulsive center with that in a homogeneous electric field and found interesting connections between the two.

Details

ISSN :
10941622 and 10502947
Volume :
89
Database :
OpenAIRE
Journal :
Physical Review A
Accession number :
edsair.doi...........737229ea64caf4d522de67e1beff3fb7
Full Text :
https://doi.org/10.1103/physreva.89.013417