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Ionic Conductivity of TlBr _{1 - {\rm x}} I _{\rm x} ({\rm x} = 0, 0.2, 1) : Candidate Gamma Ray Detector

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7 Author(s)
S. R. Bishop ; Materials Science and Engineering Department at the Massachusetts Institute of Technology, Cambridge, MA, USA ; G. Ciampi ; C. D. Lee ; M. Kuhn
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The ionic conductivity of TlBr, TlI and their solid solutions, candidates for high energy radiation detection, was examined using impedance spectroscopy. The orthorhombic to cubic phase change in TlI was observed via a steep change in conductivity with increasing temperature, whereas the TlBr-TlI solid solution was cubic throughout the measured temperature range, in agreement with the literature. The intrinsic conductivity of the cubic phase of each material showed nearly identical behavior, indicating that I substitution for Br has little to no effect on the combined defect formation and transport parameters in the studied range. Additionally, optical transmission was correlated with I concentration.

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IEEE Transactions on Nuclear Science  (Volume:59 ,  Issue: 5 )