Thallium chalcohalides for X-ray and γ-ray detection

Authors :: Arthur J Freeman
John A. Peters
Zhifu Liu
Hosub Jin
Sandy L. Nguyen
Christos D. Malliakas
Simon Johnsen
Mercouri G. Kanatzidis
Jung Hwan Song
Bruce W. Wessels
Source :: Johnsen, S, Liu, Z, Peters, J A, Song, J-H, Nguyen, S, Malliakas, C D, Jin, H, Freeman, A J, Wessels, B W & Kanatzidis, M G 2011, ' Thallium Chalcohalides for X-ray and γ-ray Detection ', Journal of the American Chemical Society, vol. 133, no. 26, pp. 10030-3 . https://doi.org/10.1021/ja202540t
Publication Year :: 2011
Abstract: We report that the chalcohalide compound Tl(6)SeI(4) is a promising material for efficient X-ray and γ-ray detection. This material has a higher figure of merit than the current state-of-the-art material for room-temperature operation, Cd(0.9)Zn(0.1)Te (CZT). We have synthesized high-quality single-crystalline wafers of Tl(6)SeI(4) with detector-grade resistivities and good carrier transport of both electrons and holes. We demonstrate that pulse height spectra recorded using Co-57 radiation show an energy resolution matching that of a commercial CZT detector material.