Theory of Laser-Pulse-Induced Molecular Dynamics: Gas-Phase Molecular Collisions and Adbond Dynamics PDF Download
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Author: Hai-Woong Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
A semiclassical study presented here indicates that a sufficiently short and intense pulse can be much more effective in inducing a collisional radiative transition than cw radiation or a long pulse, although the intensity must not be too high because the Rabi oscillation can bring down the probability. For the situation of a molecule physisorbed on a crystalline surface and irradiated by a laser, a master equation approach, used to describe the time evolution of the population of the vibrational adbond levels, shows that for high intensities laser-induced vibrational excitation is the same for pulsed and cw lasers. Keywords: Molecular dynamics, Laser induced, Short pulses, Molecular collisions, Electronic transitions, Desorption.
Author: Hai-Woong Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
A semiclassical study presented here indicates that a sufficiently short and intense pulse can be much more effective in inducing a collisional radiative transition than cw radiation or a long pulse, although the intensity must not be too high because the Rabi oscillation can bring down the probability. For the situation of a molecule physisorbed on a crystalline surface and irradiated by a laser, a master equation approach, used to describe the time evolution of the population of the vibrational adbond levels, shows that for high intensities laser-induced vibrational excitation is the same for pulsed and cw lasers. Keywords: Molecular dynamics, Laser induced, Short pulses, Molecular collisions, Electronic transitions, Desorption.
Author: Jui-teng Lin
Publisher:
ISBN:
Category :
Languages : en
Pages : 155
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Book Description
Various theoretical approaches to laser-induced molecular dynamics in the context of multiphoton processes are reviewed. The presentation is divided into two general categories: gas-phase processes and surface processes. Within the first category, unimolecular dynamics and molecular collisions are addressed. Within the second category, energy flow in adspecies-surface systems is examined, and laser applications to surface chemistry are discussed.
Author: Andre D. Bandruk
Publisher: Springer Science & Business Media
ISBN: 1461309670
Category : Science
Languages : en
Pages : 460
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Book Description
This volume contains the lectures and communications presented at the NATO Advanced Research Workshop on "Atomic and Molecular Processes with Short Intense Laser Pulses" (NATO ARW 848/86). The workshop was held at Bishop's University, Lennoxville, Que, Canada, July 19-24, 1987, under the directorship of Prof. A.D. Bandrauk, Universite de Sherbrooke. A scientific committee made up of Dr. P. Corkum (Laser Physics, ~ational Research Council of Canada), Dr. P. Hackett (Laser Chemistry, National Research Council of Canada), Prof. S.C. Wallace (Dept. of Chemistry and Physics, University of Toronto), and Prof. F.H.M. Faisal (FakultHt fUr Physik, UniversitHt Bellefeld) was called upon to invite and organize eminent lectures in the fields of i) Coherence Phenomena in Atomic and Molecular Photoprocesses. ii) High Intensity Atomic and Molecular Phenomena. iii) Laser Chemistry The aim of the workshop was to bring together chemists and physicists in order to~iscuss and analyze the progress made in the use of short in tense laser pulses in understanding coherence phenomena and high intensity, nonlin~adiative effects in atomic and molecular systems.
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 1126
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Igor Pastirk
Publisher:
ISBN:
Category : Lasers in chemistry
Languages : en
Pages : 372
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 544
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Book Description
Author: Thomas F. George
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
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 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. Transitions between electronic-field surfaces are effected by trajectories propagating through intersection points between the surfaces analytically continued into the complex plane.
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1260
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Book Description
Author:
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1256
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Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Author: Thomas F. George
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
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Book Description
A review of theoretical work by the author and collaborators and related experiments is presented for two segments of laser-induced chemistry: molecular dynamics and rate processes in the gas phase and at a solid surface and gas-surface interface. For the gas phase, the focus is on situations where the radiation interacts directly with the dynamics to enhance or create new processes. The field of laser-surface chemistry is still undergoing a procedure of definition, and progress to date is discussed. Theoretical failures as well as successes are analyzed and viewpoints are offered as to new directions for both theory and experiment. (Author).
