dc.contributor.author | Sanderud, Audun | en_US |
dc.contributor.author | Sagstuen, Einar | en_US |
dc.contributor.author | Lund, Anders | en_US |
dc.contributor.author | Maruani, Jean | en_US |
dc.date.accessioned | 2010-04-08T12:17:02Z | |
dc.date.available | 2010-04-08T12:17:02Z | |
dc.date.issued | 2009 | en_US |
dc.identifier.citation | Lund, 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.issn | 0033-7587 | en_US |
dc.identifier.uri | http://dx.doi.org/10.1667/RR1890.1 | |
dc.identifier.uri | https://hdl.handle.net/10642/215 | |
dc.description.abstract | Based 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.iso | eng | en_US |
dc.publisher | Radiation Research Society | en_US |
dc.relation.ispartofseries | Radiation Research;172 | en_US |
dc.subject | Saturation | en_US |
dc.subject | Microwaves | en_US |
dc.subject | Measurements | en_US |
dc.subject | VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 | en_US |
dc.subject | EPR | en_US |
dc.title | Relaxation-Time Determination from Continuous-Microwave Saturation of EPR Spectra | en_US |
dc.type | Journal article | en_US |
dc.type | Peer reviewed | en_US |
dc.identifier.doi | http://hdl.handle.net/10642/215 | |