Scintillation Characteristics of ${\rm Ce}:{\rm Gd}_{2}{\rm Si}_{2}{\rm O}_{7}$ (Ce 2.5–30 mol%) Single Crystals Prepared by the Floating Zone Method

Cerium-doped gadolinium pyrosilicate single crystals Ce:Gd
₂
Si
₂
O
₇
(Ce:GPS) with various Ce concentrations of 2.5-30 mol% with respect to the total rare-earth sites were prepared by the floating zone method. Their scintillation performances were investigated under irradiation of gamma rays of
¹³⁷
Cs. The Ce concentration dependence of scintillation characteristics and high-performance scintillation characteristics were obtained: 3-6 times greater light output than that of BGO single crystals, rapid decay, and good energy resolutions of 5.1-8.4%. Furthermore, X-ray diffraction patterns of Ce:GPS revealed Ce concentration dependence of the crystal structure of Ce:GPS.