Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/38765
Título: | Gd2O3: Eu3+/PPO/POPOP/PS composites for digital imaging radiation detectors |
Autor(es): | Oliveira, J. Martins, P.M. Martins, Pedro Libânio Abreu Correia, V. Rocha, J. G. Lanceros-Méndez, S. |
Palavras-chave: | Polymer-matrix composites Nano composites Functional composites X-ray conversion |
Data: | 2015 |
Editora: | Springer Verlag |
Revista: | Applied Physics A: Materials Science and Processing |
Citação: | Oliveira, 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 |
Resumo(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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/38765 |
DOI: | 10.1007/s00339-015-9435-2 |
ISSN: | 0947-8396 |
e-ISSN: | 1432-0630 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CAlg - Artigos em revistas internacionais / Papers in international journals CDF - FCD - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Oliveira_2015.pdf Acesso restrito! | 868,82 kB | Adobe PDF | Ver/Abrir |