Automated Data Acquisition and Analysis System for Positron Annihilation Spectroscopy

مرکز و کتابخانه مطالعات اسلامی به زبان های اروپایی

منو

" Automated Data Acquisition and Analysis System for Positron Annihilation Spectroscopy "
Umer, Muhammad Adil Tav, Cumali

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1112927
Doc. No	:	TLpq230732790
Main Entry	:	H. B. A. Balkhoyor
Title & Author	:	A study of translational diffusion constants of paramagnetic species in solution\ H. B. A. Balkhoyor
College	:	King Fahd University of Petroleum and Minerals (Saudi Arabia)
Date	:	1993
student score	:	1993
Degree	:	M.S.
Page No	:	153
Abstract	:	The translational diffusion constants of two paramagnetic species, dichlorobis(usd\etausd-cyclopentadienyl)vanadium, abbreviated as (Cp2VCl2) in chloroform, and S-methyl-N-usd5 usd-methoxy-salicylidenehydrazine-carbodithioatophenanthroline-oxovnadium(IV), abbreviated as VO (5-MeO-Sal SB) (Phen) in methylene chloride were measured at room temperature (25 1C) by a capillary diffusion method. The translational diffusion processes were monitored by electron spin resonance spectral intensities as a function of time. The total spectral intensities were plotted as a function of time and from the best least squares fit a single value of the translational diffusion coefficient was obtained. A computer program based on Fick's second law of diffusion for the capillary diffusion cell has been written to get a single value of the diffusion constant. It was found that Cp2VCl2 was undergoing anisotropic reorientation with N = 2.7 0.5 at an axis z = Y. In addition, the rotational correlation times as a function of temperature were determined from the line width data. (Abstract shortened by UMI.)
Subject	:	Chemistry
	:	Pure sciences