Characterization of elpasolite (Cs,Tl)2LiLaBr6:Ce (CTLLB) crystal performance after sequential gamma irradiation exposure

E. Ariesanti; R. Hawrami; H. Parkhe; V. Buliga; A. Burger; M. Duff; C. Verst; S. Uba; S. Babalola

doi:10.1117/12.3029901

9 October 2024 Characterization of elpasolite (Cs,Tl)₂LiLaBr₆:Ce (CTLLB) crystal performance after sequential gamma irradiation exposure

E. Ariesanti, R. Hawrami, H. Parkhe, V. Buliga, A. Burger, M. Duff, C. Verst, S. Uba, S. Babalola

Author Affiliations +

Proceedings Volume 13151, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXVI; 1315104 (2024) https://doi.org/10.1117/12.3029901
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

Elpasolite scintillators show great promise for dual mode neutron-gamma radiation detection and imaging but the impact of high dose radiation on performance characteristics has not been evaluated. Crystalline (Cs,Tl)₂LiLaBr₆:Ce (CTLLB) materials are grown. After growth the 1-inch diameter crystals are processed and packaged. Prior to the irradiation sequence at SRNL, the detector performance of the encapsulated crystal is measured with gamma-ray check sources including ¹³⁷Cs and ¹⁵²Eu. Properties such as energy resolution, light yield, proportionality behavior, and decay times are measured. The packaged crystal is irradiated four times at dose rates of 1, 10, 100 and 1,000 Gy of absorbed dose in a ⁶⁰Co irradiation and the performance of the crystal is evaluated before and after each radiation treatment. Cumulative dose rates between irradiation were 1, 11, 111 and 1,111 Gy. Initial results show a decreased measured light yield after each radiation exposure, however further analysis on the packaging materials will be pursued.

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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

E. Ariesanti, R. Hawrami, H. Parkhe, V. Buliga, A. Burger, M. Duff, C. Verst, S. Uba, and S. Babalola "Characterization of elpasolite (Cs,Tl)₂LiLaBr₆:Ce (CTLLB) crystal performance after sequential gamma irradiation exposure", Proc. SPIE 13151, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXVI, 1315104 (9 October 2024); https://doi.org/10.1117/12.3029901

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