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Intensity and polarization of light emitted in slow ion‐atom collisions
Author(s) -
Dacosta Herbert F. M.,
Micha David A.,
Runge Keith
Publication year - 1996
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/(sici)1097-461x(1996)60:7<1469::aid-qua28>3.0.co;2-y
Subject(s) - atomic physics , ion , diatomic molecule , dipole , atomic orbital , polarization (electrochemistry) , kinetic energy , physics , atom (system on chip) , chemistry , intensity (physics) , electron , optics , nuclear physics , quantum mechanics , molecule , computer science , embedded system
We study the intensity and polarization of light emitted during slow ion‐atom collisions. We describe the nuclei as moving along classical trajectories while the electronic rearrangement is treated using time‐dependent molecular orbitals. The intensity of emitted light is calculated from the diatomic time‐dependent dipole. We evaluate the diatomic dipole matrix elements involving 1 s , 2 s , and 2 p traveling atomic orbitals suitable for time‐dependent collision studies. We calculate the intensity and the polarization of light emitted in p + H(1 s ) collisions at kinetic energies from 10 to 1000 eV, for several impact parameters, changing over time. The emitted intensity goes through a maximum as the collision energy increases and lasts between 10 and 1 fs; the polarized light components parallel and perpendicular to the incoming beam direction show pronounced dependences on impact parameters and time. © 1996 John Wiley & Sons, Inc.