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TitleGd2O3: Eu3+/PPO/POPOP/PS composites for digital imaging radiation detectors
Author(s)Oliveira, J.
Martins, P.M.
Martins, Pedro Libânio Abreu
Correia, V.
Rocha, J. G.
Lanceros-Méndez, S.
KeywordsPolymer-matrix composites
Nano composites
Functional composites
X-ray conversion
Issue date2015
PublisherSpringer Verlag
JournalApplied Physics A: Materials Science and Processing
CitationOliveira, J., Martins, P. M., Martins, P., Correia, V., Rocha, J. G., & Lanceros-Mendez, S. (2015). Gd<inf>2</inf>O<inf>3</inf>:Eu3+/PPO/POPOP/PS composites for digital imaging radiation detectors. Applied Physics A: Materials Science and Processing. doi: 10.1007/s00339-015-9435-2
Abstract(s)Polymer based scintillator composites have been produced by combining polystyrene (PS) and Gd2O3:Eu3+ scintillator nanoparticles. Polystyrene has been used since it is a flexible and stable binder matrix, resistant to thermal and light deterioration and with suitable optical properties. Gd2O3:Eu3+ has been selected as scintillator material due to its wide band gap, high density and visible light yield. The optical, thermal and electrical characteristics of the composites were studied as a function of filler content, together with their performance as scintillator material. Additionally 1wt.% of 2,5 dipheniloxazol (PPO) and 0.01wt.% of (1,4-bis(2-(5-phenioxazolil))-benzol (POPOP) were introduced in the polymer matrix in order to strongly improve light yield, i.e. the measured intensity of the output visible radiation, under X-ray irradiation. Whereas increasing scintillator filler concentration (from 0.25wt.% to 7.5wt.%) increases scintillator light yield, decreases the optical transparency of the composite. The addition of PPO and POPOP, strongly increased the overall 2 transduction performance of the composite due to specific absorption and re-emission processes. It is thus shown that Gd2O3:Eu3+/PPO/POPOP/PS composites in 0.25 wt.% of scintillator content with fluorescence molecules is suitable for the development of innovate large area X-ray radiation detectors with huge demand from the industries.
AccessRestricted access (UMinho)
Appears in Collections:CAlg - Artigos em revistas internacionais/Papers in international journals
CDF - FCD - Artigos/Papers (with refereeing)

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