Size effects on the properties of high z scintillator materials

Bernadette A. Hernandez-Sanchez; Timothy J. Boyle; Janelle Villone; Pin Yang; Mark Kinnan; Sarah Hoppe; Steve Thoma; Khalid M. Hattar; F. Patrick Doty

doi:10.1117/12.930163

19 October 2012 Size effects on the properties of high z scintillator materials

Bernadette A. Hernandez-Sanchez, Timothy J. Boyle, Janelle Villone, Pin Yang, Mark Kinnan, Sarah Hoppe, Steve Thoma, Khalid M. Hattar, F. Patrick Doty

Author Affiliations +

Proceedings Volume 8509, Penetrating Radiation Systems and Applications XIII; 85090G (2012) https://doi.org/10.1117/12.930163
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

Particle size effects of nano- and polycrystalline metal tungstate MWO4 (M = Ca, Pb, Cd) scintillators were examined through a comparison of commercially available powders and solution precipitation prepared nanoscaled materials. The scintillation behaviors of nanoparticles and commercial powders were examined with ion beam induced luminescence (IBIL), photoluminescence (PL), and cathodoluminescence (CL) spectroscopy techniques. For commercial microns sized MWO4 powders, spectral emission differences between CL and PL were only observed for Cd and Pb tungstates when compared to reported single crystals. The IBIL wavelength emissions also differed from the commercial MWO4 CL and PL data and were red shifted by 28 and 14 nm for CaWO4 and CdWO4; respectively, while PbWO4 had no significant change. IBIL analysis on CaWO4 nanoparticles produced a 40 nm blue shift from the commercial powder emission. These preliminary results suggest that both size and cation Z may affect the emission properties of the MWO4 scintillators.

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Bernadette A. Hernandez-Sanchez, Timothy J. Boyle, Janelle Villone, Pin Yang, Mark Kinnan, Sarah Hoppe, Steve Thoma, Khalid M. Hattar, and F. Patrick Doty "Size effects on the properties of high z scintillator materials", Proc. SPIE 8509, Penetrating Radiation Systems and Applications XIII, 85090G (19 October 2012); https://doi.org/10.1117/12.930163

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