Anisotropic intermolecular potentials for HeC/sub 2/H/sub 2/, HeC/sub 2/H/sub 4/, and HeC/sub 2/H/sub 6/, and an effective spherical potential for HeCHF/sub 3/ from multiproperty fits

Journal Article · Thu Mar 31 23:00:00 EST 1988 · J. Chem. Phys.; (United States)

OSTI ID:5274626

Danielson, L J; Keil, M; Dunlop, P J

Differential cross section (DCS) measurements are reported for scattering of a He atomic beam by crossed beams of C/sub 2/H/sub 2/, C/sub 2/H/sub 4/, C/sub 2/H/sub 6/, and CHF/sub 3/. In addition, interaction virial measurements and accurate limiting diffusion measurements are presented for these systems. Damping of the DCS diffraction oscillations is used to extract anisotropic intermolecular potentials, which are constrained in multiproperty fits to accurately reproduce the dilute gas data. The radial anisotropies determined are in the sequence C/sub 2/H/sub 6/>C/sub 2/H/sub 4/)similarreverse arrowto)C/sub 2/H/sub 2/>CHF/sub 3/, as sampled by the He probe

• Research Organization: Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
• OSTI ID: 5274626
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 88:7; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ACETYLENE
ALKANES
ALKENES
ALKYNES
ANISOTROPY
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
ATOMIC BEAMS
BEAMS
COLLISIONS
COMPLEXES
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELEMENTS
ETHANE
ETHYLENE
FLUIDS
FLUORINATED ALIPHATIC HYDROCARBONS
FLUOROFORM
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
HELIUM
HELIUM COMPLEXES
HYDROCARBONS
INTERMOLECULAR FORCES
MOLECULAR BEAMS
MOLECULE COLLISIONS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POTENTIALS
RARE GASES