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Published January 2019 | public
Journal Article

La and La/Ce Doped BaF_2 Crystals for Future HEP Experiments at the Energy and Intensity Frontiers Part II


In addition to La-doped barium fluoride (BaF_2) crystals, La/Ce co-doped BaF_2 crystals were also investigated at the California Institute of Technology, Pasadena, CA, USA. Strong cerium-induced emissions peaked at 305 and 320 nm with a decay time of 25 ns were observed, in addition to the fast and slow scintillation at 220 and 300 nm, respectively. The La/Ce co-doping was also found effective in suppressing the slow component in BaF_2. Compared to La-doped crystals, the La/Ce co-doped crystals have a better light output in both 50- and 2500-ns gate. The fast/slow ratio of La/Ce co-doped crystal was found to be about 1/1, similar to La-doping, which is also considered not sufficient for pile-up suppression. A 20-cm-long La/Ce co-doped BaF_2 crystal shows also excellent optical quality and light response uniformity.

Additional Information

© 2018 IEEE. Manuscript received August 31, 2018; revised October 29, 2018; accepted November 30, 2018. Date of publication December 5, 2018; date of current version January 17, 2019. This work was supported in part by the U.S. Department of Energy, Office of High Energy Physics Program under Award DE-SC0011925, in part by the Fundamental Research Funds for the Central Universities of China, in part by the Natural Science Funds of Tianjin under Grant 18JCYBJC17800, and in part by the Natural Science Funds of China under Grant 51402332 and Grant 11775120.

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August 19, 2023
October 19, 2023