The Deconvolution and Evaluation of the Area Under ESR Lines

Hector Flores-Llamas, Hemani Yee-Madeira

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Two methods for the deconvolution of ESR spectral lines and the evaluation of the area under these lines are presented. The first method makes use of Gautschi’s algorithm (1970) for the evaluation of the derivative of the Voigt function and then it is least-squares fitted to the experimental first derivative resonance line. The second method uses as input data the maximum, the minimum and their separation on the second derivative of the resonance line. Both methods are applicable to single-crystal lines, low viscosity liquid lines, and completely isotropic-powder or frozen solution spectral lines. A couple of relationships between the area under the resonance curve and parameters obtained in each method are found. The two methods presented here improve on previous deconvolution procedures proposed, since no extra low-temperature measurements are required and a fitting criterion is used for the comparison with the experimental spectrum, including the background. © 1992 IOP Publishing Ltd.
Original languageAmerican English
Pages (from-to)970-973
Number of pages872
JournalJournal of Physics D: Applied Physics
DOIs
StatePublished - 14 Jun 1992

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Deconvolution
resonance lines
line spectra
Paramagnetic resonance
Derivatives
evaluation
temperature measurement
viscosity
Temperature measurement
Powders
single crystals
curves
liquids
Single crystals
Viscosity
Liquids

Cite this

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title = "The Deconvolution and Evaluation of the Area Under ESR Lines",
abstract = "Two methods for the deconvolution of ESR spectral lines and the evaluation of the area under these lines are presented. The first method makes use of Gautschi’s algorithm (1970) for the evaluation of the derivative of the Voigt function and then it is least-squares fitted to the experimental first derivative resonance line. The second method uses as input data the maximum, the minimum and their separation on the second derivative of the resonance line. Both methods are applicable to single-crystal lines, low viscosity liquid lines, and completely isotropic-powder or frozen solution spectral lines. A couple of relationships between the area under the resonance curve and parameters obtained in each method are found. The two methods presented here improve on previous deconvolution procedures proposed, since no extra low-temperature measurements are required and a fitting criterion is used for the comparison with the experimental spectrum, including the background. {\circledC} 1992 IOP Publishing Ltd.",
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The Deconvolution and Evaluation of the Area Under ESR Lines. / Flores-Llamas, Hector; Yee-Madeira, Hemani.

In: Journal of Physics D: Applied Physics, 14.06.1992, p. 970-973.

Research output: Contribution to journalArticle

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