Bettega, M. H. F. and Winstead, C. and McKoy, V. and Jo, A. and Gauf, A. and Tanner, J. and Hargreaves, L. R. and Khakoo, M. A. (2001) Collisions of low-energy electrons with isopropanol. Physical Review A, 84 (4). Art. No. 042702. ISSN 1050-2947 http://resolver.caltech.edu/CaltechAUTHORS:20111107-083727468
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We report measured and calculated cross sections for elastic scattering of low-energy electrons by isopropanol (propan-2-ol). The experimental data were obtained using the relative flow technique with helium as the standard gas and a thin aperture as the collimating target gas source, which permits use of this method without the restrictions imposed by the relative flow pressure conditions on helium and the unknown gas. The differential cross sections were measured at energies of 1.5, 2, 3, 5, 6, 8, 10, 15, 20, and 30 eV and for scattering angles from 10∘ to 130∘. The cross sections were computed over the same energy range employing the Schwinger multichannel method in the static-exchange plus polarization approximation. Agreement between theory and experiment is very good. The present data are compared with previously calculated and measured results for n-propanol, the other isomer of C_3H_7OH. Although the integral and momentum transfer cross sections for the isomers are very similar, the differential cross sections show a strong isomeric effect: In contrast to the f-wave behavior seen in scattering by n-propanol, d-wave behavior is observed in the cross sections of isopropanol. These results corroborate our previous observations in electron collisions with isomers of C_4H_9OH.
|Additional Information:||© 2011 American Physical Society. Received 16 August 2011; published 5 October 2011. This work was funded through a collaborative program by the US National Science Foundation under Grant Nos. PHY 0653452 and PHY 0653396 and by the Brazilian Conselho Nacional de Desenvolvimento Científico e Tecnolόgico (CNPq) under Project No. 490415-2007–5. M.H.F.B. also acknowledges support from the Paraná state agency Fundação Araucária and from FINEP (under Project No. CT-Infra), as well as computational support from Professor Carlos M. de Carvalho at DFis–UFPR and at LCPAD–UFPR. Work by V.M. and C.W. was also supported by the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, US Department of Energy. The authors acknowledge the use of the Jet Propulsion Laboratory’s Supercomputing and Visualization Facility, where the present calculations were performed.|
|Classification Code:||PACS: 34.80.Bm, 34.80.Gs|
|Official Citation:||Collisions of low-energy electrons with isopropanol M. H. F. Bettega, C. Winstead, V. McKoy, A. Jo, A. Gauf, J. Tanner, L. R. Hargreaves, and M. A. Khakoo Published 5 October 2011 (5 pages) 042702|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||07 Nov 2011 17:03|
|Last Modified:||26 Dec 2012 14:22|
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