Accession Number : AD0613150

Title :   SCATTERING OF HIGH-VELOCITY NEUTRAL PARTICLES. XIII. AR-CH4; A TEST OF THE PERIPHERALFORCE APPROXIMATION,

Corporate Author : MARYLAND UNIV COLLEGE PARK INST FOR MOLECULAR PHYSICS

Personal Author(s) : Mason,E. A. ; Amdur,I.

Report Date : 13 JUL 1964

Pagination or Media Count : 4

Abstract : Collision cross sections were measured for argon atoms with energies between 700 and 2100 eV, scattered in room-temperature methane. The results were analyzed to obtain the average potential between an argon atom and a methane molecule, V(gamma)) sub Av = 936/gamma to 7.85 power eV, 2.31 A< or = gamma < or = 2.66 A. This result has been used as a test of combination-rule approximations by comparing it with the average potential calculated from previous measurements on He-CH4, He-He, and Ar-Ar. The peripheral-force approximation gives consistent relations among the experimental results for these systems. (Author)

Descriptors :   (*POLYATOMIC MOLECULES, MOLECULAR ASSOCIATION), (*PHYSICAL CHEMISTRY, POLYATOMIC MOLECULES), (*MOLECULAR ASSOCIATION, POLYATOMIC MOLECULES), ATOMS, PARTICLE BEAMS, NUCLEAR SCATTERING, ARGON, METHANE, CHEMICAL BONDS, NUCLEAR CROSS SECTIONS, POTENTIAL THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE