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Development of radiation hard scintillators [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
10 pages : digital, PDF file
Additional Creators
Fermi National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The authors have demonstrated that the radiation stability of scintillators made from styrene polymer is very much improved by compounding with pentaphenyltrimethyltrisiloxane (DC 705 vacuum pump oil). The resulting scintillators are softer than desired, so they decided to make the scintillators directly from monomer where the base resin could be easily crosslinked to improve the mechanical properties. They can now demonstrate that scintillators made directly from the monomer, using both styrene and 4-methyl styrene, are also much more radiation resistant when modified with DC705 oil. In fact, they retain from 92% to 95% of their original light output after gamma irradiation to 10 Mrads in nitrogen with air annealing. When these scintillators made directly from monomer are compared with scintillators of the same composition made from polymer the latter have much higher light outputs. They commonly reach 83% while those made form monomer give only 50% to 60% relative to the reference, BC408. When oil modified scintillators using both p-terphenyl and tetraphenylbutadiene are compared with identical scintillators except that they use 3 hydroxy-flavone as the only luminophore the radiation stability is the same. However the 3HF system gives only 30% as much light as BC408 instead of 83% when both are measured with a green extended Phillips XP2081B phototube.
Report Numbers
E 1.99:fnal-tm--1867
fnal-tm--1867
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
11/01/1993.
"fnal-tm--1867"
"DE94013204"
Harmon, J.; Keller, J.; Foster, G.; Markley, F.; Rivard, M.; Pla-Dalmau, A.; Davidson, M.; Senchishin, V.; Biagtan, E.; Schueneman, G.; Gustfason, H.
Type of Report and Period Covered Note
Topical; 11/01/1993 - 11/01/1993
Funding Information
AC02-76CH03000
View MARC record | catkey: 14400740