Accession Number : AD0677330

Title :   A STUDY OF THE ELECTRIC DEFLECTION OF MOLECULAR BEAMS.

Descriptive Note : Scientific interim rept.,

Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s) : Greene,Frank T. ; Milne,Thomas A.

Report Date : AUG 1968

Pagination or Media Count : 33

Abstract : A classical electric deflection apparatus, incorporating ultra-high vacuum technology and mass spectrometric detection, has proven to operate satisfactorily in tests with Na, K, and NaCl species. An ion counting system for use with modulated beams is operational. Attempts to operate a bakeable tuning fork, to permit time-of-flight velocity distribution analysis, have been hampered by mechanical problems connected with the bakeout requirement. An examination of Hall and Zorn's recent results, however, indicates that with our ability to operate the entire beam system at 1 x 10 to the -8th power torr or less, it may not be necessary to perform velocity selected experiments. Computer data reduction schemes for polarizable nonpolar molecules and for linear molecules with dipole moments and polarizability are in use. The power of universal detection is illustrated by the first measurements of the polarizability of Na2 and Na2Cl2. The latter shows an unexplained, large polarizability, at least raising the question of the validity of simple ionic models for such species. (Author)

Descriptors :   (*MOLECULAR BEAMS, DEFLECTION), DIPOLE MOMENTS, ELECTRIC MOMENTS, MASS SPECTROSCOPY, VACUUM APPARATUS, TUNING FORKS, VELOCITY, POLARIZATION, PULSES, SODIUM, POTASSIUM, SODIUM CHLORIDE, ELECTRIC FIELDS, RADIOFREQUENCY LENSES

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE