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Molecular dynamics study of the collision-induced rotational alignment of N-2(+) drifting in helium

TitleMolecular dynamics study of the collision-induced rotational alignment of N-2(+) drifting in helium
Publication TypeJournal Article
Year of Publication2001
AuthorsBaranowski, R, Wagner, B, Thachuk, M
JournalJournal of Chemical Physics
Volume114
Pagination6662-6671
Date PublishedApr
Type of ArticleArticle
ISBN Number0021-9606
KeywordsEXCITATION, GENERALIZED CROSS-SECTIONS, HE, IONS, KINETIC-THEORY, LIGHTER GASES, STATE, TRANSPORT, TUBE EXPERIMENTS, VELOCITY DISTRIBUTIONS
Abstract

The full velocity-angular momentum distribution function for gas-phase N-2(+) drifting in helium is calculated using a molecular dynamics method, and utilized to examine collision-induced rotational alignment in detail. These results are also compared with experimental measurements, most especially those of Anthony [J. Chem. Phys. 112, 10269 (2000)] and those appearing in the preceding article [Anthony , J. Chem. Phys. 114, 6654 (2001)]. Both the calculations and experiments show a number of interesting features including, drift velocities which depend upon rotational state, and quadrupolar alignment parameters which change from negative at high velocities to positive at low velocities. (C) 2001 American Institute of Physics.

URL<Go to ISI>://000167914400020