Growth and scintillation properties of Pr doped (Lu,Y)3(Ga,Al)5O12 single crystals

Author

Kamada, Kei ; Yanagida, Takayuki ; Pejchal, Jan ; Nikl, Martin ; Endo, Takanori ; Tsutumi, Kousuke ; Fujimoto, Yutaka ; Fukabori, Akihiro ; Yoshikawa, Akira

Author_Institution

Mater. Res. Lab., Furukawa Co., Ltd., Tsukuba, Japan

fYear

2011

fDate

23-29 Oct. 2011

Firstpage

1559

Lastpage

1561

Abstract

Pr: (Lu,Y)₃(Ga,Al)₅O₁₂ single crystals were grown by the micro-pulling down (μ-PD) method. Luminescence and scintillation properties were measured. The substitution phenomenon in the Lu³⁺ sites with Y³⁺ and Al³⁺ sites with Ga³⁺ in garnet structure has been studied. Pr³⁺ 5d-4f emission within 300-400nm accompanied by weak Pr³⁺ 4f-4f emission in 480-650nm are observed in Ga 0-60 at.% substituted samples. Ga 80 at.% substituted sample shows only Pr³⁺ 4f-4f emission. The light output of Pr1%:Lu₂Y₁Ga₂Al₂O₁₂ sample was almost same as that of Cz grown Pr:LuAG standard. Two-component scintillation decay shows 17.9ns (93%) and 68.0ns (7%) using the PMT and digital oscilloscope TDS5032B. Slower decay components are reduced by Ga and Y substitution in LuAG structure.

Keywords

crystal growth from melt; crystal structure; luminescence; lutetium compounds; praseodymium; scintillation; solid scintillation detectors; yttrium compounds; (Lu-Y)₃(Ga-Al)₅O₁₂:Pr; Al³⁺ sites; Lu³⁺ sites; PMT; Pr doped (Lu,Y)₃(Ga,Al)₅O₁₂; Pr³⁺ 4f-4f emission; Pr³⁺ 5d-4f emission; Y³⁺ sites; digital oscilloscope; garnet structure; luminescence; micropulling down method; single crystal growth; single crystal scintillation properties; substitution phenomenon; time 17.9 ns; time 68.0 ns; two component scintillation decay; wavelength 300 nm to 400 nm; wavelength 480 nm to 650 nm; Heating;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE

Conference_Location

Valencia

ISSN

1082-3654

Print_ISBN

978-1-4673-0118-3

Type

conf

DOI

10.1109/NSSMIC.2011.6154631

Filename

6154631