CdWO4-on-MEH-PPV:PS as a candidate for real-time dosimeters.
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Date
2012
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Abstract
We report on the investigations about the modification of optical properties induced by X-rays onto film detectors of cadmium tungstate (CdWO4), poly[2-methoxy-5(20 -ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) and polystyrene (PS) This device takes advantage of reduction of spectral overlap between the radioluminescence (RL) of CdWO4 and the absorption of MEH-PPV as it is exposed to radiation, forming the basis of a new dosimeter that is capable of converting the orange-red radioluminescence of PS:MEH-PPV:CdWO4 into green. We propose an explanation of the optical processes occurring in MEHPPV:CdWO4 in terms of the radiation hardness of CdWO4 combined to the RL-induced degradation of MEH-PPV.
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Keywords
Composite materials, Optical materials, Irradiation effects, Luminescence
Citation
SILVA, M. M. et al. CdWO4-on-MEH-PPV:PS as a candidate for real-time dosimeters. Materials Chemistry and Physics, v. 136, p. 317-319, 2012. Disponível em: <http://www.sciencedirect.com/science/article/pii/S025405841200733X>. Acesso em: 23 fev. 2015.