| Theory of Laser-Pulse-Induced Molecular Dynamics: Gas-Phase Molecular Collisions and Adbond Dynamics |
JUL 87 |
16 pages |
| Authors:
Hai-Woong Lee; Sander van Smaalen; Thomas F. George; STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY
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 | 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 ... |
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| Analysis of Experimental Data for Neutralization of Low-Energy Ions at a Solid Surface |
JAN 86 |
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| Authors:
Hai-Woong Lee; Thomas F. George; STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY
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 | When low-energy ions are incident on a solid surface, a large fraction is neutralized via on Auger or resonance process. Some useful information on details of the neutralization process can be obtained by studying the ion fraction of backscattered particles. An accurate evaluation of the characteristic velocity, is expected to be particularly useful. In this paper we give a theoretical analysis of experimental ion yield data that exist in the ... |
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| Emission of Short-Wavelength Photons from Ion-Surface Charge Exchange |
AUG 1983 |
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| Authors:
Hai-Woong Lee; Thomas F. George; ROCHESTER UNIV NY DEPT OF CHEMISTRY
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| The intensity of radiation emitted from ion-surface charge-exchange processes can be significantly enhanced if the surface exposed to impinging ions is electronically excited. Alpha particles capturing electrons at a silicon surface are considered as a possible candidate for a short-wavelength laser. |
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| Production of Short-Wavelength (XUV) Photons from Ion-Laser-Excited- Surface Charge Exchange: Li(3+), He(+) + Si(111) Systems |
JUN 1983 |
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| Authors:
Hai-Woong Lee; Thomas F. George; ROCHESTER UNIV NY DEPT OF CHEMISTRY
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| Semiclassical calculations are carried out for the probabilities of electron transfer for Li3+ and He+ ions colliding with a Si(111) surface, where a laser is used to excite electrons in silicon from the valence band to surface states. It is shown that with a moderate-power laser, hgh inversion densities of Li2+ and He+ can be obtained, as necessary for high gain. (Author) |
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| Theory of Reactions at a Solid Surface |
MAR 1983 |
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| Authors:
Thomas F. George; Ki-Tung Lee; William C. Murphy; Michael Hutchinson; Hai-Woong Lee; ROCHESTER UNIV NY DEPT OF CHEMISTRY
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| Theories and computational procedures are reviewed for processes involving bond breaking and formation at a solid surface. These processes include reactive scattering, recombination, adsorption and desorption. The article ends with a discussion of theoretical techniques for describing how some of the above processes are induced or modified by laser radiation. |
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| Neutralization of Ions at an Electronically-Excited Semiconductor Surface |
SEP 1982 |
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| Authors:
Hai-Woong Lee; William C. Murphy; Thomas F. George; ROCHESTER UNIV NY DEPT OF CHEMISTRY
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| Neutralization of positive ions colliding with a semiconductor surface is studied. It is shown that the neutralization probability can be significantly enhanced if the surface exposed to the impinging ions is electronically excited. The basic reason behind this is that the impinging ions have easier access to the excited surface electrons than to bulk electrons. (Author) |
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Reports by Author
