Line-shape theory and molecular dynamics in collision-induced light scattering

Journal Article · Mon Jan 01 04:00:00 EST 1979 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.19.177· OSTI ID:6387035

Balucani, U; Tognetti, V; Vallauri, R

Molecular-dynamics studies in argon at 148 amagats are presented for gaining information on the dynamical properties responsible for the depolarized light scattering from simple fluids. The total and pair-correlation functions are computed within the simple dipole--induced-dipole model of polarizability anisotropy. The pair spectral shape is derived. These results are compared with a theoretical analysis based on a continued-fraction approach. The necessary frequency moments are calculated both in the low-density limit and taking into account first-order density corrections, and compared with the molecular-dynamics data. The agreement between the theoretical spectra and molecular-dynamics data shows the validity of the memory-function approach. The comparison with the real experimental results allows one to test the relevant physical contributions to the polarizability anisotropy.

• Research Organization: Laboratorio di Elettronica Quantistica del C.N.R., Via Panciatichi 56/30, Firenze, Italy
• OSTI ID: 6387035
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 19:1; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANISOTROPY
ARGON
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
COLLISIONS
ELECTRICAL PROPERTIES
ELEMENTS
HIGH PRESSURE
LIGHT SCATTERING
LINE WIDTHS
NONMETALS
PHYSICAL PROPERTIES
POLARIZABILITY
RARE GASES