Interaction-induced translational Raman scattering in dense krypton gas: Evidence of irreducible many-body effects

Journal Article · Sat Oct 15 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.3984· OSTI ID:7065931

Barocchi, F; Celli, M; Zoppi, M

Depolarized interaction-induced light-scattering (DILS) spectra of dense gaseous krypton have been measured at room temperature (297 K) in the pressure range 10--270 bars. The absolute values of the integrated intensity and the second spectral moment have been evaluated, at each density, from the measured spectra, by means of a calibration procedure which makes use of a mixture containing a small fraction of molecular hydrogen, whose rotational Raman lines are used as an intensity standard. Monte Carlo computer simulation has been used to evaluate the first two even spectral moments at various densities and room temperature. The simulation was performed by use of the pairwise-additive potential and polarizability. The pair potential was the one given by R. A. Aziz (Mol. Phys. 38, 177 (1979)) while models for the pair-polarizability anisotropy were derived from the low-density collisional spectrum. The comparison between theory and experiment suggests that the second spectral moment is affected by irreducible many-body terms. It is suggested that, in addition to neutron scattering, DILS can be used as an experimental tool to probe irreducible many-body properties.

• Research Organization: Dipartimento di Fisica, Universita degli Studi di Firenze, Largo E. Fermi 2, I-50125 Firenze, Italy
• OSTI ID: 7065931
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:8; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ELEMENTS
FLUIDS
GASES
INTERACTIONS
KRYPTON
LIGHT SCATTERING
MANY-BODY PROBLEM
NONMETALS
PARTICLE INTERACTIONS
POTENTIALS
PRESSURE DEPENDENCE
RAMAN SPECTRA
RARE GASES
SCATTERING
SPECTRA