Proton magnetic resonance measurements in gases
department or school: Science, Faculty of
department or school: Physics and Astronomy, Department of
data provider: DSpace
degree campus: UBCV
creator: Lipsicas-Lipschitz, Max Menachem Mordechai
issued: 2011-12-15T02:23:21Z
issued: 1960
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: The work reported here is a proton magnetic resonance investigation of some polyatomic gases. Pulsed nuclear magnetic resonance techniques were used throughout. Little systematic work on gases using this technique has been reported hitherto, and the present study clearly indicates the potentialities of nuclear magnetic resonance experiments for the investigation of certain physical processes occurring in gases. The gases studied were hydrogen (H₂), methane (CH₄), ethane (C₂H₆) and ethylene (C₂H₄). A spectrometer and ancilliary equipment have been constructed enabling measurements to be made at 30 Mc/s, over a temperature range from 35K° to 300K° using gas pressures up to 200 atmospheres. In hydrogen, the spin-lattice relaxation time, T₁, was studied as a function of the density, temperature and ortho-para concentration of the gas. In the "dilute" gas region, T₁ was found to increase linearly with density at fixed temperature, indicating that the relaxation process is of intra-molecular origin and that studies of T₁ are able to yield valuable information on the asymmetric part of the intermolecular interaction. The temperature dependence of T₁ (at fixed density) was studied in the "dilute" gas between 35K° and 300K°, and quantum effects were discovered at low temperatures. In the dense gas, at low temperatures, T₁ was found to be a very rapidly increasing function of density at fixed temperature. In the dilute gas, T₁, at fixed density and temperature, was found to increase with increasing ortho-hydrogen concentration, indicating that the cross-section for a reorientation collision of two orthohydrogen molecules is greater than that for a collision between an ortho-molecule and a paramolecule. Diffusion measurements in hydrogen were carried out, at 78K°, as a function of density in the "dilute" gas, and it has been shown that the coefficient of self-diffusion is inversely proportional to density. The spin-spin relaxation time, T₂, for hydrogen at 78K° has been found …
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/39729
note: PROTON MAGNETIC RESONANCE MEASUREMENTS IN GASES by ^ MAX MENACHEM MORDECHAI LIPSICAS-LIPSCHITZ Hons, B.Sc., University of London, 1950 Hons. B.Sc.(Eng.), University of London, 1951 A THESIS SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in the Department of PHYSICS We accept t h i s thesis as conforming to the standard required from candidates for the degree of DOCTOR OF PHILOSOPHY THE UNIVERSITY OF BRITISH COLUMBIA October, I960 In presenting t h i s t h e s i s i n p a r t i a l f u l f i l m e n t of the requirements f o r an advanced degree at the U n i v e r s i t y of B r i t i s h Columbia, I agree th a t the L i b r a r y s h a l l make i t f r e e l y a v a i l a b l e f o r reference and study. I f u r t h e r agree that permission f o r extensive copying of t h i s t h e s i s f o r s c h o l a r l y purposes may be granted by the Head of my Department or by h i s r e p r e s e n t a t i v e s . I t i s understood t h a t copying or p u b l i c a t i o n of t h i s t h e s i s f o r f i n a n c i a l g a i n s h a l l not be allowed without my w r i t t e n permission. Department of The U n i v e r s i t y of B r i t i s h Columbia, Vancouver $, Canada. PUBLICATIONS 1. K. R. Allen, M . Lipsicas, W. F. Williams and D . Fotheringham. "Stereoscopic Cameras for Use with a Wilson Cloud Chamber". Rev. Sci. Insts., 24, 501, 1953. 2. K . R. Allen and M . Lipsicas. The Cloud Chamber, Research, 6, 416, 1953. 3. K . R. Allen, M . Lipsicas, D . Major and K . Phillips. " O n the Single Scattering of 13.5 MeV Electrons in Xenon." Proc. Phys. Soc, 69, 141, 1956. 4. K . R. Allen, E . A . Finlay, M . Lipsicas, D . Major and K . Phillips. "On the Single Scattering of 9.8 M e V Positrons in Xenon." Proc. Phys. Soc; 70, 355, 1957. 5. M . Lipsicas. "Nuclear Magnetic Resonance." British J. of Comms. and Electronics, 4, 686, 1957. 6. M . Lipsicas and M . Bloom. "Nuclear Spin Relaxation Measure-ments in Hydrogen Gas." Proceedings, 7th …
has type: Thesis/Dissertation
is shown at: 10.14288/1.0085899
language: eng
degree discipline: Physics
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/39729