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Title: Growth and properties of Lithium Salicylate single crystals

Abstract

An attractive feature of {sup 6}Li containing fluorescence materials that determines their potential application in radiation detection is the capture reaction with slow ({approx}< 100 keV) neutrons: {sup 6}Li + n = {sup 4}He + {sup 3}H + 4.8MeV. The use of {sup 6}Li-salicylate (LiSal, LiC{sub 6}H{sub 5}O{sub 3}) for thermal neutron detection was previously studied in liquid and polycrystalline scintillators. The studies showed that both liquid and polycrystalline LiSal scintillators could be utilized in pulse shape discrimination (PSD) techniques that enable separation of neutrons from the background gamma radiation. However, it was found that the efficiency of neutron detection using LiSal in liquid solutions was severely limited by its low solubility in commonly used organic solvents like, for example, toluene or xylene. Better results were obtained with neutron detectors containing the compound in its crystalline form, such as pressed pellets, or microscopic-scale (7-14 micron) crystals dispersed in various media. The expectation drown from these studies was that further improvement of pulse height, PSD, and efficiency characteristics could be reached with larger and more transparent LiSal crystals, growth of which has not been reported so far. In this paper, we present the first results on growth and characterization of relativelymore » large, a cm-scale size, single crystals of LiSal with good optical quality. The crystals were grown both from aqueous and anhydrous (methanol) media, mainly for neutron detection studies. However, the results on growth and structural characterization may be interesting for other fields where LiSal, together with other alkali metal salicylates, is used for biological, medical, and chemical (as catalyst) applications.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
965955
Report Number(s):
LLNL-JRNL-410824
TRN: US0904000
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Crystal Growth & Design, vol. 9, no. 8, August 1, 2009, pp. 3799-3802
Additional Journal Information:
Journal Volume: 9; Journal Issue: 8
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUMM MECHANICS, GENERAL PHYSICS; 22 GENERAL STUDIES OF NUCLEAR REACTORS; ALKALI METALS; DETECTION; EFFICIENCY; FLUORESCENCE; GAMMA RADIATION; LITHIUM; METHANOL; MONOCRYSTALS; NEUTRON DETECTION; NEUTRON DETECTORS; NEUTRONS; ORGANIC SOLVENTS; PELLETS; PHOSPHORS; RADIATION DETECTION; SOLUBILITY; THERMAL NEUTRONS; TOLUENE

Citation Formats

Zaitseva, N, Newby, J, Hull, G, Saw, C, Carman, L, Cherepy, N, and Payne, S. Growth and properties of Lithium Salicylate single crystals. United States: N. p., 2009. Web. doi:10.1021/cg9005289.
Zaitseva, N, Newby, J, Hull, G, Saw, C, Carman, L, Cherepy, N, & Payne, S. Growth and properties of Lithium Salicylate single crystals. United States. doi:10.1021/cg9005289.
Zaitseva, N, Newby, J, Hull, G, Saw, C, Carman, L, Cherepy, N, and Payne, S. Fri . "Growth and properties of Lithium Salicylate single crystals". United States. doi:10.1021/cg9005289. https://www.osti.gov/servlets/purl/965955.
@article{osti_965955,
title = {Growth and properties of Lithium Salicylate single crystals},
author = {Zaitseva, N and Newby, J and Hull, G and Saw, C and Carman, L and Cherepy, N and Payne, S},
abstractNote = {An attractive feature of {sup 6}Li containing fluorescence materials that determines their potential application in radiation detection is the capture reaction with slow ({approx}< 100 keV) neutrons: {sup 6}Li + n = {sup 4}He + {sup 3}H + 4.8MeV. The use of {sup 6}Li-salicylate (LiSal, LiC{sub 6}H{sub 5}O{sub 3}) for thermal neutron detection was previously studied in liquid and polycrystalline scintillators. The studies showed that both liquid and polycrystalline LiSal scintillators could be utilized in pulse shape discrimination (PSD) techniques that enable separation of neutrons from the background gamma radiation. However, it was found that the efficiency of neutron detection using LiSal in liquid solutions was severely limited by its low solubility in commonly used organic solvents like, for example, toluene or xylene. Better results were obtained with neutron detectors containing the compound in its crystalline form, such as pressed pellets, or microscopic-scale (7-14 micron) crystals dispersed in various media. The expectation drown from these studies was that further improvement of pulse height, PSD, and efficiency characteristics could be reached with larger and more transparent LiSal crystals, growth of which has not been reported so far. In this paper, we present the first results on growth and characterization of relatively large, a cm-scale size, single crystals of LiSal with good optical quality. The crystals were grown both from aqueous and anhydrous (methanol) media, mainly for neutron detection studies. However, the results on growth and structural characterization may be interesting for other fields where LiSal, together with other alkali metal salicylates, is used for biological, medical, and chemical (as catalyst) applications.},
doi = {10.1021/cg9005289},
journal = {Crystal Growth & Design, vol. 9, no. 8, August 1, 2009, pp. 3799-3802},
number = 8,
volume = 9,
place = {United States},
year = {2009},
month = {2}
}