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Your search keyword '"Kwiram, A. L."' showing total 2 results
Start Over Author "Kwiram, A. L." Topic magnetic resonance
2 results on '"Kwiram, A. L."'

1. On the nature of the relationship between inhomogeneously broadened phosphorescence and ODMR spectral lines.

Author

Williamson, Rodney L. and Kwiram, Alvin L.

Subjects
*PHOSPHORESCENCE, *MAGNETIC resonance, *SPECTRUM analysis
Abstract

The nature of the inhomogeneous broadening of optical and ODMR spectral lines of aromatic molecules hosted in low temperature glasses is experimentally and theoretically investigated. Particular attention is paid to the relationships which exist between the various classes of inhomogeneously broadened spectral lines, and the salient features are illustrated with the results of ‘‘site selection’’ spectroscopy. A theoretical formalism based on the assumption of a uniform ‘‘solvent field’’ is presented and used to account for the major experimental features. Various ODMR line broadening mechanisms are considered and their relative importance evaluated. [ABSTRACT FROM AUTHOR]

Published
1988
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2. I. A chemical application of electron-nuclear double resonance. II. Auxiliary equipment

Author

Kwiram, Alvin L.

Subjects
magnetic resonance, Chemistry, glutaric acid, electron spin resonance, free radicals, ENDOR
Abstract

Part I: The technique of electron-nuclear double resonance (ENDOR) is applied to the study of the hyperfine interactions in one (A) of the two radicals formed by x-irradiating single crystals of glutaric acid. It is shown that the other radical (B) can be destroyed with u.v. irradiation. Complete hyperfine tensors based on the EMR data are calculated for the A radical using an iterative procedure which is also prescribed. Comparing this data with the ENDOR measurements reveals an appreciable orientations disorder of the radicals as well as temperature dependent splitting. Small hyperfine interactions not resolvable in EMR spectra are observable via ENDOR. The experimental development is described in some detail. Part II: A low temperature EMR system which permits in situ u.v. irradiation is described. The TE011 microwave cavity, which operates at room temperature, accommodates the helium cold finger along the cavities' axis of symmetry.

Published
1963
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