Accession Number : AD0660042

Title :   APPLICATIONS OF MOLECULAR BEAMS TO THE MEASUREMENT OF COLLISION CROSS SECTIONS AND TO THE DETERMINATION OF INTERMOLECULAR FORCES.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY

Personal Author(s) : Amdur,I.

Report Date : JUL 1967

Pagination or Media Count : 23

Abstract : The experimental basis for the determination of intermolecular forces from the scattering of high velocity neutral beams is discussed with special reference to the following: Conditions which must prevail if classical mechanics is to be used in the analysis of the scattering results; the role of apparatus geometry with respect to the changes of interaction distances in which potentials derived from scattering will be valid; the type of apparatus which is suitable for obtaining repulsive potentials in the approximate range 0.1-10 eV. Typical results are given to illustrate the general features of the scattering of neutral beams of this type. The most important of these features are the strong forward scattering, the dependence of experimental total cross sections on apparatus geometry, and the magnitudes and ranges of validity of the derived interaction potentials. It is shown that the potential energy information obtained from the scattering experiments may be successfully applied to a variety of problems among which are high temperature transport properties of gases and properties of alkali halides in the solid and gaseous state. (Author)

Descriptors :   (*MOLECULAR BEAMS, INTERACTIONS), MOLECULAR ASSOCIATION, CHEMICAL BONDS, POTENTIAL ENERGY, SCATTERING, INSTRUMENTATION, PROBABILITY

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE