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Scintillation properties of the silver doped lithium iodide single crystals at room and low temperature

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Title
Scintillation properties of the silver doped lithium iodide single crystals at room and low temperature
Author(s)
Khan S.; Kim H.J.; M. H. Lee
Publication Date
2016-06
Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.821, no., pp.81 - 86
Publisher
ELSEVIER SCIENCE BV
Abstract
This study presents luminescence and scintillation properties of Silver doped LiI crystals. Single crystals of LiI: x% Ag (x=0.02, 0.05, 0.1 and 0.5) were grown by using the Bridgman technique. X-ray induced luminescence spectra show emission bands spanning from 275 nm to 675 nm, dominated by Ag+ band having a peak at 300 nm. Under UV-luminescence, a similar emission band was observed with the peak excitation wavelength of 265 nm. Energy resolution, light yield and decay time profiles of the samples were measured under a 137Cs γ-ray irradiation. The LiI(0.1%Ag) showed the highest light yield and the best energy resolution among the samples. The light yield of LiI(0.1%Ag) is higher than commercially available LiI(Eu) crystal (15,000±1500 ph/MeV). The LiI(Ag) samples exhibit three exponential decay time components except the LiI(0.02%Ag), where the fitting found two decay time components. Temperature dependences of emission spectra, light yield and decay time were studied from 300 K to 10 K. The LiI(0.1%Ag) crystal showed an increase in the light yield and a shortening of decay time with a decrease in temperature. © 2016 Elsevier B.V. All rights reserved
URI
https://pr.ibs.re.kr/handle/8788114/2474
ISSN
0168-9002
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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1-s2.0-S0168900216300705-main 지하실험.pdfDownload

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