The first five terms are analytically calculated for the Taylor expansion of symmetric and asymmetric top orientational correlation functions (OCFs) in the Keilson-Storer (KS) model. The three stages of the orientationai relaxation (OR) are established: (a) the free rotor stage, Ca) the stage which
A consideration of orientational correlation functions, time-dependent distribution functions and pictorial representations of the orientational motions of molecules.
β Scribed by Martin S. Beevers; Graham Williams
- Publisher
- Elsevier Science
- Year
- 1980
- Weight
- 967 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0378-4487
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β¦ Synopsis
The relationships between experimental quantities which arise due to the dynamics of molecules and the underlying time-correlation functions and timedependent distribution functions are considered, with special emphasis being given to reorientational motions as detected by dielectric and closely related techniques. It is shown that pictorial representations of angular motion (small-step diffusion, free rotation, collision-interrupted rotation) may be given in terms of three and two dimensional diagrams of the time-dependent orientation distribution functions and that these afford a physical insight and appreciation of the averaged motions of ensembles of molecules.
π SIMILAR VOLUMES
The orientation distribution function (ODF) is most commonly described in the Bunge-Euler space using generalized spherical harmonics (GSH) as a Fourier basis. In this paper, we explore critically the relative advantages and disadvantages of using an alternate description of the ODF using the much m
The thermalization of electrons in gaseous moderators for initial nonequilibrium distributions not far removed from thermal energies has been studied previously with a Fokker-Planck equation for electron distribution. For electron energies in the keV to eV energy range an approach based on the Spenc