skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Improved Neutron Scintillators Based on Nanomaterials

Abstract

The development work conducted in this SBIR has so far not supported the premise that using nano-particles in LiFZnS:Ag foils improves their transparency to 420 (or other frequency) light. This conclusion is based solely on the light absorption properties of LiFZnS foils fabricated from nano- and from micro-particles. Furthermore, even for the case of the Gd{sub 2}O{sub 3} foils, the transmission of 420 nm light gained by using nano-particles all but disappears as the foil thickness is increased beyond about 0.2 mm, a practical scintillator thickness. This was not immediately apparent from the preliminary study since no foils thicker than about 0.04 mm were produced. Initially it was believed that the failure to see an improvement by using nano-particles for the LiFZnS foils was caused by the clumping of the particles in Toluene due to the polarity of the ZnS particles. However, we found, much to our surprise, that nano-particle ZnS alone in polystyrene, and in Epoxy, had worse light transmission properties than the micro-particle foils for equivalent thickness and density foils. The neutron detection measurements, while disappointing, are attributable to our inability to procure or fabricate Bulk Doped ZnS nanoparticles. The cause for the failure of nano-particles to improvemore » the scintillation light, and hence improved neutron detection efficiency, is a fundamental one of light scattering within the scintillator. A consequence of PartTec's documentation of this is that several concepts for the fabrication of improved {sup 6}LiFZnS scintillators were formulated that will be the subject of a future SBIR submission.« less

Authors:
Publication Date:
Research Org.:
PartTec, Ltd.
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
948088
Report Number(s):
DOEER84885
TRN: US1000940
DOE Contract Number:  
FG02-07ER84885
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABSORPTION; DOCUMENTATION; EFFICIENCY; FABRICATION; LIGHT SCATTERING; LIGHT TRANSMISSION; NEUTRON DETECTION; NEUTRONS; PHOSPHORS; POLYSTYRENE; SCINTILLATIONS; THICKNESS; TOLUENE; Neutron, Scintillator, Organic

Citation Formats

Dennis Friesel, PhD. Improved Neutron Scintillators Based on Nanomaterials. United States: N. p., 2008. Web. doi:10.2172/948088.
Dennis Friesel, PhD. Improved Neutron Scintillators Based on Nanomaterials. United States. doi:10.2172/948088.
Dennis Friesel, PhD. Mon . "Improved Neutron Scintillators Based on Nanomaterials". United States. doi:10.2172/948088. https://www.osti.gov/servlets/purl/948088.
@article{osti_948088,
title = {Improved Neutron Scintillators Based on Nanomaterials},
author = {Dennis Friesel, PhD},
abstractNote = {The development work conducted in this SBIR has so far not supported the premise that using nano-particles in LiFZnS:Ag foils improves their transparency to 420 (or other frequency) light. This conclusion is based solely on the light absorption properties of LiFZnS foils fabricated from nano- and from micro-particles. Furthermore, even for the case of the Gd{sub 2}O{sub 3} foils, the transmission of 420 nm light gained by using nano-particles all but disappears as the foil thickness is increased beyond about 0.2 mm, a practical scintillator thickness. This was not immediately apparent from the preliminary study since no foils thicker than about 0.04 mm were produced. Initially it was believed that the failure to see an improvement by using nano-particles for the LiFZnS foils was caused by the clumping of the particles in Toluene due to the polarity of the ZnS particles. However, we found, much to our surprise, that nano-particle ZnS alone in polystyrene, and in Epoxy, had worse light transmission properties than the micro-particle foils for equivalent thickness and density foils. The neutron detection measurements, while disappointing, are attributable to our inability to procure or fabricate Bulk Doped ZnS nanoparticles. The cause for the failure of nano-particles to improve the scintillation light, and hence improved neutron detection efficiency, is a fundamental one of light scattering within the scintillator. A consequence of PartTec's documentation of this is that several concepts for the fabrication of improved {sup 6}LiFZnS scintillators were formulated that will be the subject of a future SBIR submission.},
doi = {10.2172/948088},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {6}
}