Study of long range anisotropic potentials for CsF, CsCl, and KCl interacting with the rare gases based on measured state-to-state rotationally inelastic cross sections. I. Measurements for CsCl and KCl

Journal Article · Tue Sep 15 04:00:00 EDT 1981 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.442346· OSTI ID:6150955

Meyer, G; Toennies, J P

Absolute inelastic cross sections for rotational quantum state-to-state transitions have been measured in small angle grazing collisions of CsCl and KCl with the rare gas atoms. With CsCl the transitions (j,m) = (3,0)arrow-right-left(4,0) and with KCl the transitions (2,0)arrow-right-left(3,0) were studied. The cross sections for CsCl are similar in size to those reported previously for CsF by Borkenhagen, Malthan, and Toennies (J. Chem. Phys. 71, 1722 (1979)), whereas the cross sections for KCl are found to be considerably smaller. The cross sections are corrected for apparatus effects and analyzed in terms of the Born approximation and the long range anisotropic potential. A comparison of absolute center of mass differential cross sections reveals that the cross sections for CsCl and to a greater extent for KCl are considerably greater than expected for a pure induction potential. The relative size of the additional potential term is determined and is found to be somewhat smaller than the higher polarizability dispersion term predicted by Buckingham (J. Chem. Phys. 48, 3827 (1968)) using the Rittner model.

• Research Organization: Max-Planck-Institut fuer Stroemungsforschung, 3400 Goettingen, Federal Republic of Germany
• OSTI ID: 6150955
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 75:6; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METAL COMPOUNDS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CESIUM CHLORIDES
CESIUM COMPOUNDS
CESIUM FLUORIDES
CHLORIDES
CHLORINE COMPOUNDS
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
INTERATOMIC FORCES
MOLECULE COLLISIONS
NONMETALS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
RARE GASES
ROTATIONAL STATES