@article{e108ff91a91a4385b20b4da6dc0ccd65,
title = "Growth and luminescent properties of Cs2HfCl6 scintillators doped with alkaline earth metals",
abstract = "Nondoped Cs2HfCl6 (CHC) and alkaline earth metal-doped CHC (AE:CHC) crystals were grown by the vertical Bridgman-Stockbarger method. The spectra of the AE:CHC under X-ray excitation were similar to those for the AE-free crystal; thus, AE doping did not change emission wavelength of CHC. We determined the light outputs and energy resolutions of nondoped CHC and AE:CHC by measuring pulse-height spectra under 662-keV gamma-ray excitation of a 137Cs source. Both light output and energy resolution were deteriorated with AE doping. For example, nondoped CHC had a light output of 44 000 photons/MeV and energy resolution of 5.2%; on the other hand, Sr 0.5 at.%-doped CHC had a light output of only 28 000 photons/MeV and energy resolution of 10%. Scintillation decay also did not change. The nonproportional response values of light output versus gamma-ray energy did not improve in AE:CHC either. Therefore, doped AEs can be responsible for creation of defect trap levels which would hamper the carrier transport in CHC structure.",
keywords = "Crystal growth, nonproportionality, scintillators",
author = "Shohei Kodama and Shunsuke Kurosawa and Jan Pejchal and Robert Kral and Akihiro Yamaji and Yuji Ohashi and Yuui Yokota and Kei Kamada and Martin Nikl and Akira Yoshikawa",
note = "Funding Information: Manuscript received April 17, 2018; revised May 31, 2018; accepted June 12, 2018. Date of publication June 18, 2018; date of current version August 15, 2018. This work was supported in part by the Japan Society for the Promotion of Science (JSPS) KAKENHI under Grant 14462961, Grant 15597934, and Grant 15619740 (by Grant-in-Aid for Young Scientists(B), etc., S. Kurosawa), in part by the Bilateral AS CR-JSPS Joint Research Project, in part by the Japan Science and Technology Agency (JST), Development of Systems and Technology for Advanced Measurement and Analysis (SENTAN), in part by the JST, Adaptable & Seamless Technology Transfer Program through Target-Driven Research And Development, in part by the Association for the Progress of New Chemical Technology, in part by the Research Foundation for the Electrotechnology of Chubu, in part by the Nippon Sheet Glass Foundation for Materials Science and Engineering, in part by the Tonen General Sekiyu Foundation, in part by the Yazaki Memorial Foundation for Science and Technology, in part by the Tokin Science and Technology Promotion Foundation, in part by the Intelligent cosmos research institute, in part by the Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, in part by the International Collaboration Center Institute for Materials Research (ICC-IMR), Tohoku University and in part by the Czech Science Foundation under Project 18-17555Y.",
year = "2018",
month = aug,
doi = "10.1109/TNS.2018.2848474",
language = "English",
volume = "65",
pages = "2169--2173",
journal = "IEEE Transactions on Nuclear Science",
issn = "0018-9499",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "8",
}