Accession Number : AD0679743

Title :   THE SCATTERING OF K AND Cs BY SEVERAL COMPOUNDS.

Descriptive Note : Technical rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS

Personal Author(s) : Greene,E. F. ; Hoffman,L. F. ; Lee,M. W. ; Ross,J. ; Young,C. E.

Report Date : NOV 1968

Pagination or Media Count : 43

Abstract : The nonreactive scattering of K from C10H16, (CH3)3CBr, SiCl4, Cl2, Br2, I2, ICl, (CN)2C=C(CN)2, and Cs from HBr has been studied in experiments with crossed molecular beams. The primary alkali metal beam was velocity selected, and the scattered alkali metal was measured as a function of laboratory angle at a number of initial relative kinetic energies. Potential parameters are calculated from the rainbow scattering for K + C10H16, (CH3)3C Br, SiCl4, and Cs + HBr and also from the supernumerary rainbows for K + C10H16 and (CH3)3CBr. An optical model analysis on K+(CH3)3CBr and Cs + HBr yields information about threshold conditions for reaction, probability of reaction, and total reaction cross section as a function of relative energy. For system without rainbow scattering (K + halogens, (CN)2C = C(CN)2) an optical analysis made with a simple form for the absorption function requires a gradual change from a van der Waals potential at very large distances of separation of reactants to a more attractive potential at smaller distances. This indicates a gradual electron transfer on approach of reactants rather than on abrupt electron jump. (Author)

Descriptors :   (*MOLECULAR BEAMS, ALKALI METALS), (*ALKALI METALS, SCATTERING), POTASSIUM, CESIUM, ALKENES, SILICON COMPOUNDS, HALIDES, INTERACTIONS, PROBABILITY, SUPERSONIC COMBUSTION RAMJET ENGINES

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE