Use of central-field potentials for describing H2(D2) elastic scattering by other molecules |
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| Authors: | Robert J Gordon MJ Coggiola Aron Kuppermann |
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| Institution: | Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91109, USA |
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| Abstract: | Differential elastic scattering cross sections have been measured for the systems H2 + O2, SF6, NH3, CO and CH4 and for D2 + O2, SF6, and NH3 using crossed molecular beams. These experiments represent a wide variation in the size, anisotropy and initial relative collision energy E of the scattering partners, and of the corresponding de Broglie wavelengths. In all cases, rapid quantum oscillations have been resolved. From these differential cross sections, central-field potentials have been obtained which were independent of the energy and the isotopic composition of the hydrogen molecule used, as required for such potentials to be physically meaningful. Therefore, anisotropy effects do not seem important in describing the differential elastic scattering of these H2(D2) systems. |
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