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Spin-lattice relaxation in gaseous methane Beckmann, Peter Adrian
Abstract
The spin-lattice relaxation time T₁ has been measured in gaseous CH₄ as a function of density at room temperature. The density region investigated is from 0.006 to 7.0 amagats and T₁ passes through a minimum near 0.04 amagats. The spin-rotation interaction is the dominant relaxation mechanism in gaseous CH₄. Since the spin-rotation constants are accurately known for CH₄, the results provide a check on the existing theory of spin-lattice relaxation for spherical top molecules. An interesting feature was the failure of commonly used theoretical expressions for the density dependence of T₁ to fit the experimental data. A reasonable explanation is that the centrifugal distortion of the CH₄ molecule is indirectly contributing to the spin-lattice relaxation.
Item Metadata
| Title |
Spin-lattice relaxation in gaseous methane
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| Creator | |
| Publisher |
University of British Columbia
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| Date Issued |
1971
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| Description |
The spin-lattice relaxation time T₁ has been measured in gaseous CH₄ as a function of density at room temperature. The density region investigated is from 0.006 to 7.0 amagats and T₁ passes through a minimum near 0.04 amagats. The spin-rotation interaction is the dominant relaxation mechanism in gaseous CH₄. Since the spin-rotation constants are accurately known for CH₄, the results provide a check on the existing theory of spin-lattice relaxation for spherical top molecules. An interesting feature was the failure of commonly used theoretical expressions for the density dependence of T₁ to fit the experimental data. A reasonable explanation is that the centrifugal distortion of the CH₄ molecule is indirectly contributing to the spin-lattice relaxation.
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| Genre | |
| Type | |
| Language |
eng
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| Date Available |
2011-04-28
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| Provider |
Vancouver : University of British Columbia Library
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| 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.
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| DOI |
10.14288/1.0084857
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| URI | |
| Degree (Theses) | |
| Program (Theses) | |
| Affiliation | |
| Degree Grantor |
University of British Columbia
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| Campus | |
| Scholarly Level |
Graduate
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| Aggregated Source Repository |
DSpace
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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.