Luminescence efficiency of (Gd2SiO5:Ce) scintillator under x-ray excitation

dc.contributor.author	Βαλαής, Ιωάννης Γ.	el
dc.contributor.author	Κανδαράκης, Ιωάννης Σ.	el
dc.contributor.author	Νικολόπουλος, Δημήτριος Ν.	el
dc.contributor.author	Σιανούδης, Ιωάννης Α.	el
dc.contributor.author	Δημητρόπουλος, Νικόλαος	el
dc.date.accessioned	2015-01-24T15:42:07Z
dc.date.available	2015-01-24T15:42:07Z
dc.date.issued	2015-01-24
dc.identifier.uri	http://hdl.handle.net/11400/4668
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://e-jst.teiath.gr/	en
dc.subject	Tomography
dc.subject	Τομογραφία
dc.subject	Low energy gamma ray imaging
dc.subject	Απεικόνιση χαμηλής ενέργειας ακτίνων γάμμα
dc.subject	Photomultiplier
dc.subject	Φωτοπολλαπλασιαστής
dc.title	Luminescence efficiency of (Gd2SiO5:Ce) scintillator under x-ray excitation	en
heal.type	journalArticle
heal.classification	Science
heal.classification	Επιστήμες
heal.classification	Physics
heal.classification	Φυσική
heal.classificationURI	http://zbw.eu/stw/descriptor/15685-2
heal.classificationURI	N/A-Επιστήμες
heal.classificationURI	http://zbw.eu/stw/descriptor/15669-0
heal.classificationURI	N/A-Φυσική
heal.contributorName	Κάβουρας, Διονύσης Α.	el
heal.contributorName	Παναγιωτάκης, Γεώργιος Σ.	el
heal.language	en
heal.access	free
heal.recordProvider		el
heal.publicationDate	2006
heal.bibliographicCitation	Valais, I.G., Kandarakis, I.S., Nikolopoulos, D.N., Sianoudis, I.A., Dimitropoulos, N., et al (2006). Luminescence efficiency of (Gd2SiO5:Ce) scintillator under x-ray excitation. "e-Journal of Science & Technology". [Online] 1(1): 35-42. Available from: http://e-jst.teiath.gr/	en
heal.abstract	Gd2SiO5:Ce (GSO:Ce) is a high-Z, nonhygroscopic fast emitting scintillator used in detectors of some positron tomography systems. The purpose of this study was to evaluate the luminescence of GSO:Ce scintillator at lower photon energies employed in other fields of medical imaging (e.g. x-ray computed tomography, general x-ray imaging, low energy gamma ray imaging). To this aim the absolute luminescence efficiency (emitted light flux over x-ray exposure), the matching factor (spectral compatibility to optical detectors) and the effective efficiency (combination of absolute efficiency with spectral compatibility) were experimentally determined. Various xray tube voltages ranging from 20 to 140 kV (employed in xray mammography, general radiography, and computed tomography) were used. In addition the behaviour of GSO: Ce under low energy gamma irradiation could be estimated from these data. Measurements were performed using an experimental set-up based on a photomultiplier coupled to an integration sphere. The GSO:Ce optical emission spectrum was measured under x-ray excitation using an optical grating monochromator. The efficiency of GSO:Ce was found to increase with increasing x-ray tube voltage, while the GSO:Ce spectrum, peaking at 440 and 490 nm, was found compatible with most optical detectors (photodiodes, photocathodes, charge coupled devices). However the spectral compatibility (0.77) and the effective efficiency were found highest for GSO coupled to photodiode.	en
heal.publisher	Νερατζής, Ηλίας	el
heal.publisher	Σιανούδης, Ιωάννης	el
heal.journalName	e-Journal of Science & Technology	en
heal.journalName	e-Περιοδικό Επιστήμης & Τεχνολογίας	el
heal.journalType	peer-reviewed
heal.fullTextAvailability	true