Floating zone growth and scintillation characteristics of cerium-doped gadolinium pyrosilicate single crystals

Growth and luminescence characteristics of cerium-doped yttrium pyrosilicate single crystal

“…The promising performance of Lu 2 Si 2 O 7 :Ce (LPS:Ce) scintillator [9,10] has attracted great attention on other Re 2 Si 2 O 7 :Ce scintillators. Trails of Fz growth of Gd 2 Si 2 O 7 :Ce crystal have been carried out and this scintillator shows much better scintillation performance than GSO:Ce crystal [11,12]. Powder samples of YPS:Ce [13][14][15] and europium doped YPS [16] were obtained and their photoluminescence properties were also reported.…”

Dependence of Crystal Structures and Scintillation Properties on Cerium Concentration in Gd2Si2O7:Ce Powder Synthesized by Solid State Reaction

“…Kawamura et al reported that a GPS scintillator grown by a floating zone method had light yield several times higher than that of a conventional BGO scintillator. In addition, the GPS had high energy resolution of 5.0% for 662 keV gamma-rays from 137 Cs 4) . Yagi et al, after synthesizing GPS with several compositions using sol-gel method, reported the phase transformation of the crystal structure of pyrosilicate, type E, F and G, when the ratio of cerium against gadolinium was increased 4) .…”

“…In addition, the GPS had high energy resolution of 5.0% for 662 keV gamma-rays from 137 Cs 4) . Yagi et al, after synthesizing GPS with several compositions using sol-gel method, reported the phase transformation of the crystal structure of pyrosilicate, type E, F and G, when the ratio of cerium against gadolinium was increased 4) . According to J. Felsche 6) , crystal structures of rare-earth pyrosilicate (RE 2 Si 2 O 7 ) depend on the mean ionic radius of RE…”

Improvement of Scintillation Characteristics of FZ Growth Ce:GPS Crystals by Annealing in Air

“…This emission spectrum has two peaks at 375 nm and 390 nm. These peaks correspond to the 5d-4f transition in Ce 3+ luminescent center 15) . In contrast, excitation spectrum of photoluminescence was changed by the annealing process.…”

“…Later, we succeeded to fabricate a Ce:GPS single crystal by the floating zone method (FZ method). This crystal has good properties for scintillator, i.e., 2.5 times light output greater than Ce:GSO single crystal, 46 ns light decay time, and 6.0% energy resolution for 662 keV gamma-rays 15) . We achieved that 3 times light output greater than Ce:GSO and 5.1% energy resolution by optimizing the Ce concentration 16) .…”