Ce concentration dependence of optical and scintillation properties on Ce-doped La2Si2O7 crystal

被引：8

作者：

Kantuptim, Prom ^{[1
]}

Kato, Takumi ^{[1
]}

Nakauchi, Daisuke ^{[1
]}

Kawaguchi, Noriaki ^{[1
]}

Yanagida, Takayuki ^{[1
]}

机构：

[1] Nara Inst Sci & Technol, Grad Sch Sci & Technol, Div Mat Sci, 8916-5 Takayama, Nara 6300192, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2022年 / 61卷 / SB期

基金：

日本学术振兴会;

关键词：

Scintillator; Single crystal; Lanthanum pyrosilicate; Ce3+; LIGHT YIELD; EMISSION; PHOTOLUMINESCENCE; RESOLUTION; EFFICIENT; SECURITY; BOARD;

D O I：

10.35848/1347-4065/ac18a9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A lanthanum pyrosilicate (La2Si2O7, LaPS) single crystal is successfully grown with a Ce-doped concentration of 0.5 to 20.0% as well as undoped LaPS for reference. The photoluminescence emission map of Ce-doped LaPS has broad emission at 360-410 nm from Ce3+ 5d-4f transition, with a decay time of 20-24 ns. In the scintillation properties, Ce-doped LaPS presents the scintillation peak at 390 nm under X-ray excitation, with the decay time constant at 26-31 ns plus another decay constant caused by the emission from host material at 250-600 ns. The afterglow level at 20 ms after X-ray irradiation is around 30-56 ppm. In the 662 keV gamma-ray pulse height spectra, 1.0% Ce-doped LaPS shows a clear photoabsorption peak, with a scintillation light yield of 5400 ph MeV-1. The relationship between gamma-ray energy and the photoabsorption peak channel (linearity) is also covered in this study.

引用

页数：5

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