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dc.contributor.authorSanderud, Audunen_US
dc.contributor.authorSagstuen, Einaren_US
dc.contributor.authorLund, Andersen_US
dc.contributor.authorMaruani, Jeanen_US
dc.date.accessioned2010-04-08T12:17:02Z
dc.date.available2010-04-08T12:17:02Z
dc.date.issued2009en_US
dc.identifier.citationLund, A., Sagstuen, E., Sanderud, A. and Maruani, J. (2009). Relaxation-Time Determination from Continuous-Microwave Saturation of EPR Spectra. Radiation Research, 172, 753–760.en_US
dc.identifier.issn0033-7587en_US
dc.identifier.urihttp://dx.doi.org/10.1667/RR1890.1
dc.description.abstractBased on the theories of Portis and of Castner 50 years ago, different continuous-wave measurement procedures for analyzing the microwave saturation power dependence of inhomogeneously broadened EPR lines were developed. Although these procedures have been refined, they still use only a few selected points on the saturation curve. A non-linear least-squares procedure for analyzing the microwave-power dependence of inhomogeneously broadened lines using all data points on a saturation curve has been developed. This procedure provides a simple alternative method to obtain magnetic relaxation data when the more direct pulse-saturation techniques are not available or are less suitable. The latter includes applications of quantitative EPR such as dosimetry. Then microwave saturation data should be obtained under conditions similar to those used in the quantitative measurements, which are usually made on first derivative spectra recorded using continuous-wave spectrometers. Selected applications to benchmark literature data and within the field of EPR dosimetry are discussed. The results obtained illustrate that relaxation times comparable to those yielded by various pulse-saturation EPR techniques can be obtained. It appears as a systematic feature that, whenever the pulse EPR data are fitted using bi-exponential functions, the shortest relaxation times obtained are those that correspond best to those measured using the current continuous-wave saturation method.en_US
dc.language.isoengen_US
dc.publisherRadiation Research Societyen_US
dc.relation.ispartofseriesRadiation Research;172en_US
dc.subjectSaturationen_US
dc.subjectMicrowavesen_US
dc.subjectMeasurementsen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430en_US
dc.subjectEPRen_US
dc.titleRelaxation-Time Determination from Continuous-Microwave Saturation of EPR Spectraen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.identifier.fulltextfulltext https://oda.hio.no/jspui/bitstream/10642/215/2/481584.pdf
dc.identifier.doihttp://hdl.handle.net/10642/215


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