Molecular dynamics in liquids from femtosecond time-resolved impulsive stimulated scattering

Author

Ruhman, Sanford ; Kohler, Bern ; Joly, Alan G. ; Nelson, Keith A.

Author_Institution

Dept. of Chem., MIT, Cambridge, MA, USA

Volume

24

Issue

2

fYear

1988

Firstpage

470

Lastpage

481

Abstract

Molecular motions in simple liquids are observed on the femtosecond time scale by means of impulsive simulated scattering. In carbon disulphide and benzene liquids, weakly oscillatory time-dependent responses are observed. These are interpreted in terms of molecular orientational motion which at short times is vibrational (i.e. librational) in character due to intermolecular interactions. In CS/sub 2/, the dephasing of the oscillations is primarily inhomogeneous. Temperature-dependent values of the configuration-averaged librational frequency and the extent of its inhomogeneity are determined.<>

Keywords

carbon compounds; intermolecular forces; liquids; organic compounds; stimulated Raman scattering; time resolved spectroscopy; vibrational states in disordered systems; CS/sub 2/; benzene liquids; femtosecond time-resolved impulsive stimulated scattering; intermolecular interactions; librational character; librational frequency; molecular dynamics; molecular orientational motion; oscillatory time-dependent responses; simple liquids; vibrational character; Fluid dynamics; Frequency; Light scattering; Liquids; Nearest neighbor searches; Optical scattering; Raman scattering; Rayleigh scattering; Time domain analysis;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.147

Filename

147