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Photodetachment of hydrogen negative ion near inelastic surfaces: Arbitrary laser polarization direction
Author(s) -
Iqbal Azmat,
Ahmad Afaq,
Amjad Raja J.
Publication year - 2015
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.24965
Subject(s) - polarization (electrochemistry) , perpendicular , atomic physics , laser , amplitude , physics , ion , semiclassical physics , oscillation (cell signaling) , hydrogen , optics , chemistry , quantum mechanics , biochemistry , geometry , mathematics , quantum
The photodetachment of hydrogen negative ionH −near different inelastic surfaces is investigated by the semiclassical closed orbit theory for arbitrary laser polarization directionθ L . A two‐term formula of photodetachment cross section consisting of a smooth background term and an oscillatory term is derived. The oscillatory term contains an extra angular factorcos 2 ( θ L ) that describes the dependence of oscillations in total cross section on the laser polarization direction. It is observed that the amplitude of oscillations in cross section reaches maximum atθ L = 0 when laser polarization is parallel to the z ‐axis and it approaches zero as the laser polarization direction becomes perpendicular to the z ‐axis. It is also observed that as the reflection coefficient α , which accounts for the inelastic behavior of the surfaces, increases the amplitude of oscillation also increases. © 2015 Wiley Periodicals, Inc.