Interferences in Photodetachment of a Negative Molecular Ion
Model |
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Authors: | A Afaq and DU Meng-Li |
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Institution: | 1.Department of Physics, COMSATS Institute of
Information Technology Lahore, Pakistan
;2.Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China |
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Abstract: | By employing a two-center model, the total and differential cross
sections in the photodetachment of ``a negative molecular ion" are
studied theoretically and obtained for the case of light
polarization parallel to the molecular axis. We find that in
contrast to the smooth behavior of the total cross section for
perpendicular polarized light, the cross section for parallel
polarized light shows an interesting oscillatory structure. The
oscillations in the total cross section may provide a method to
determine the distance between the two centers. We explain the oscillation
in the total cross section as an interference effect using closed-orbit theory. We also calculated the
detached-electron flux distributions on a screen placed at a large distance from the negative molecular ion. The distributions
display multiple-ring-like interference patterns. Such interference
patterns are similar to those in the photodetachment microscopy
experiments. |
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Keywords: | quantum interference two-center model photodetachment |
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