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Published November 2018 | public
Book Section - Chapter

Improvement of Scintillation Performance in Large Size Yttrium Doped BaF_2 Crystals


Barium fluoride (BaF_2) crystal with sub nanosecond scintillation has attracted a broad interest in the HEP community. One crucial issue is its slow scintillation component with 600 ns decay time, which causes pile-up. Our previous studies show that the slow component can be suppressed effectively by yttrium doping. In this work, a 160 mm long BaF_2 ingot with 5% yttrium doping was grown at BGRI, and was used to cut a 100 mm crystal and several small samples. Their optical and scintillation properties were measured at Caltech. The results confirm that yttrium doping effectively suppresses the slow component while maintaining its ultrafast light and light response uniformity unchanged. This is encouraging for a BaF_2 :Y crystal based ultrafast calorimeter for Mu2e-II.

Additional Information

© 2018 IEEE. Manuscript received December 15, 2018. This work was supported by the U.S. Department of Energy, Office of High Energy Physics program under Award No. DE-SC0011925.

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August 19, 2023
October 18, 2023