Theory Of Molecular Collisions In The Presence Of A Laser Field

Thomas F. George; John R. Laing; Jian-Min Yuan; I. Harold Zimmerman

doi:10.1117/12.955336

10 April 1977 Theory Of Molecular Collisions In The Presence Of A Laser Field

Thomas F. George, John R. Laing, Jian-Min Yuan, I. Harold Zimmerman

Proceedings Volume 0099, 3rd European Electro-Optics Conf; (1977) https://doi.org/10.1117/12.955336
Event: Third European Electro-Optics Conference, 1976, Geneva, Switzerland

Abstract

The reaction dynamics and mechanism of energy transfer in a gas-phase molecular collision system can be dramatically affected by an intense, external laser field. A rigorous theoretical treatment must consider explicitly the interaction of the field with the collision dynamics, where the absorption (and emission) of radiation and the molecular collision are viewed as a single process rather than separate, independent processes. The full quantum mechanical formulation yields a set of coupled equations, where the number of equations corresponds to the number of asymptotic channels (a given channel is identified by a field occupation number, vibrational, rotational, nuclear orbital angular momentum and electronic quantum numbers). A semiclassical formulation of the molecular dynamics involves the propagation of classical trajectories and their corresponding actions for nuclear motion on electronic-field potential surfaces, where each electronic-field surface depends on field-free, adiabatic electronic surfaces and radiative coupling (as functions of nuclear coordinates). Transitions between electronic-field surfaces are effected by trajectories propagating through intersection points between the surfaces analytically continued into the complex plane. Numerical results (S-matrix elements) from the quantum and semiclassical approaches have been obtained with model calculations on the process Br + H2 + hw → Br + H2.

Citation Download Citation

Thomas F. George, John R. Laing, Jian-Min Yuan, and I. Harold Zimmerman "Theory Of Molecular Collisions In The Presence Of A Laser Field", Proc. SPIE 0099, 3rd European Electro-Optics Conf, (10 April 1977); https://doi.org/10.1117/12.955336

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