Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/8206
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dc.contributor.authorFernandes, L. M. P.-
dc.contributor.authorLopes, J. A. M.-
dc.contributor.authorSantos, J. M. F. dos-
dc.contributor.authorConde, C. A. N.-
dc.date.accessioned2009-02-09T14:16:29Z-
dc.date.available2009-02-09T14:16:29Z-
dc.date.issued2001en_US
dc.identifier.citationX-Ray Spectrometry. 30:3 (2001) 164-169en_US
dc.identifier.urihttps://hdl.handle.net/10316/8206-
dc.description.abstractThe performance of several large-area avalanche photodiodes (LAAPDs) for application to x-ray spectrometry at room temperature was investigated. Optimum detector performance was obtained for gains of about 50-70. Good energy linearity of the LAAPDs' response to x-rays was observed up to energies of about 25 keV. For this energy range the space charge effects are negligible for gains below 100-150. The energy resolutions obtained with LAAPDs can be better than those obtained with proportional counters. Our results indicate that the energy resolution of an LAAPD is better than that of a proportional counter only when the LAAPD maximum dark current is <300 nA. For this case, minimum detectable x-ray energies of about 1 keV are possible. Spatial non-uniformity is responsible for an absolute increase of 1-2% in energy resolution at 6 keV when illumination of the LAAPD is broadened from 1 mm diameter to full area. Counting rates up to 5 × 104 counts s-1 are possible without significant degradation of detector performance. Copyright © 2001 John Wiley & Sons, Ltd.en_US
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleApplication of large-area avalanche photodiodes to energy-dispersive x-ray fluorescence analysisen_US
dc.typearticleen_US
dc.identifier.doi10.1002/xrs.481en_US
item.fulltextCom Texto completo-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextopen-
item.languageiso639-1en-
item.openairetypearticle-
item.cerifentitytypePublications-
crisitem.author.researchunitLIBPhys - Laboratory for Instrumentation, Biomedical Engineering and Radiation Physics-
crisitem.author.parentresearchunitUniversity of Coimbra-
crisitem.author.orcid0000-0002-8841-6523-
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais
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