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Silver-Doped LiI Crystal: A Sensitive Thermal Neutron Detector With Pulse Shape Discrimination.

Authors :
Vuong, Phan Quoc
Kim, H. J.
Khan, Arshad
Khan, Sajid
Kim, S. H.
Park, Hyeonseo
Kim, Jungho
Source :
IEEE Transactions on Nuclear Science. Oct2020, Vol. 67 Issue 10, p2290-2294. 5p.
Publication Year :
2020

Abstract

Single crystals of LiI with different Ag concentrations are investigated for dual-mode thermal neutron and γ-ray detection. The crystal growth and scintillation properties of these crystals have been studied and reported in our recent communication. On the other hand, a LiI crystal with Eu2+ dopant was used for thermal neutron detection using pulse height discrimination (PHD). However, the LiI:Eu crystal has a disadvantage in the case of high-energetic gamma background which is usually accompanied with neutrons in practical applications. In this case, LiI:Ag might be a better option since it can distinguish neutrons and γ-signals by both pulse shape discrimination (PSD) and PHD. The PSD capability of LiI:Ag was checked for alpha and gamma signals. The figure-of-merit (FOM) value was estimated to be 1.7 using the charge comparison method. LiI:Ag crystals were encapsulated for neutron measurements using 252Cf and Am–Be sources. The best FOM value was obtained to be 1.5 for the LiI:0.1%Ag crystal. The current investigation reveals that LiI:Ag can be a promising candidate for the dual-mode thermal neutron and γ-ray spectroscopy applications. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00189499
Volume :
67
Issue :
10
Database :
Academic Search Index
Journal :
IEEE Transactions on Nuclear Science
Publication Type :
Academic Journal
Accession number :
146512726
Full Text :
https://doi.org/10.1109/TNS.2020.3004936