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Nuclear quadrupole resonance in kernite Haering, Rudolph Roland
Abstract
The pure quadrupole resonance frequencies due to B¹¹ nuclei at two different sites (denoted by E and F) in a single crystal of kernite (Na₂B₄O₇.4H₂O) have been determined both by observing the B¹¹ lines in zero external magnetic field, and also by investigating their Zeeman splitting in magnetic fields up to 30 gauss. The values obtained are 1281.1 ± 2 Kc/sec and 1287.0 ± 1 Kc/sec for the E and F sites respectively. These frequencies agree within experimental error with values predicted on the basis of studies in a high magnetic field. The agreement for the F site is much better than for the E site. Some other interaction, such as asymmetric nuclear shielding, may account for the discrepancy. Resonances also have been obtained in zero field with a polycrystalline sample. Indications of B¹⁰ resonances were observed at the frequencies expected assuming Dehmelt's value for the ratio of the quadrupole coupling constants for B¹¹ and B¹⁰. A Na²³ resonance line was observed at 1560 ± 1 Kc/sec in agreement with Proctor's result for this line. The other Na²³ resonance expected from high field work has not been observed to date.
Item Metadata
Title |
Nuclear quadrupole resonance in kernite
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1955
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Description |
The pure quadrupole resonance frequencies due to B¹¹ nuclei at two different sites (denoted by E and F) in a single crystal of kernite (Na₂B₄O₇.4H₂O) have been determined both by observing the B¹¹ lines in zero external magnetic field, and also by investigating their Zeeman splitting in magnetic fields up to 30 gauss. The values obtained are 1281.1 ± 2 Kc/sec and 1287.0 ± 1 Kc/sec for the E and F sites respectively. These frequencies agree within experimental error with values predicted on the basis of studies in a high magnetic field. The agreement for the F site is much better than for the E site. Some other interaction, such as asymmetric nuclear shielding, may account for the discrepancy. Resonances also have been obtained in zero field with a polycrystalline sample. Indications of B¹⁰ resonances were observed at the frequencies expected assuming Dehmelt's value for the ratio of the quadrupole coupling constants for B¹¹ and B¹⁰. A Na²³ resonance line was observed at 1560 ± 1 Kc/sec in agreement with Proctor's result for this line. The other Na²³ resonance expected from high field work has not been observed to date.
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Genre | |
Type | |
Language |
eng
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Date Available |
2012-02-08
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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 |
10.14288/1.0103763
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URI | |
Degree | |
Program | |
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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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.