Presentation Information
[10a-PA3-6]The effect of Fe,Cr impurities on optical properties of Ce,Mg co-doped Y3(Al,Ga)5O12 single crystals
〇(M2)Hisato Suezumi1,2, Kei Kamada3,4, Liudmila Gushchina3, Masao Yoshino2,3, Satoshi Ishizawa2,3, Rikito Murakami4, Yuui Yokota5, Akira Yoshikawa2,3,4 (1.Grad. Sch. of Eng., Tohoku Univ., 2.IMR, Tohoku Univ., 3.C&A Corp., 4.NICHe, Tohoku Univ., 5.Kyusyu Univ.)
Keywords:
Scintillator,Synchrotron raddiation
To clarify the mechanism of afterglow reduction by Mg2+ co-doping in Ce-doped YAGG, vacuum ultraviolet (VUV)-excitation, emission luminescence and thermally stimulated luminescence (TSL) measurements were performed. Mg2+ co-doping significantly suppressed the 700–900 nm emission associated with Cr3+- and Fe3+-related defects, as well as the TSL peak attributed to oxygen vacancies. Furthermore, a remarkable decrease in afterglow intensity was observed. These results suggest that Mg2+ co-doping suppresses electron trapping at impurity-related defects and oxygen vacancies, thereby effectively reducing the afterglow component.