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Polymer Composites for Radiation Detection: Diiodobenzene and light emitting polymer molecular solutions for gamma detection

Published online by Cambridge University Press:  01 February 2011

Qibing Pei ,
Yongsheng Zhao  and
Haizheng Zhong
Qibing Pei
Affiliation:
qpei@seas.ucla.edu, University of California, Los Angeles, Department of Materials Science and Engineering, Engineering V Bldg, Room 3121H, 420 Westwood Plaza, Los Angeles, CA, 90095-1595, United States
Yongsheng Zhao
Affiliation:
yszhao@seas.ucla.edu, University of California, Los Angeles, Department of Materials Science and Engineering, 420 Westwood Plaza, Los Angeles, CA, 90095-1595, United States
Haizheng Zhong
Affiliation:
hzzhong@ucla.edu, University of California, Los Angeles, Department of Materials Science and Engineering, 420 Westwood Plaza, Los Angeles, CA, 90095-1595, United States
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Abstract

Conjugated polymers are largely intact by gamma exposure but can be energized in the presence of high-Z compounds. The resulting alteration of the polymer's high optical density and photoluminescence efficiency can be exploited for the detection of gamma radiation with high sensitivity. Diiodobenzene and conjugated polymers mix on the molecular level in solid thin films. Composite films of various thicknesses were conveniently cast from solution and exposed to gamma radiation. The responses of the films to gamma dosage were observed with dramatic changes in ultraviolet-visible absorption and photoluminescence.

Keywords

radiation effectspolymercomposite
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1038: Symposium O – Nuclear Radiation Detection Materials , 2007 , 1038-O03-03
Copyright
Copyright © Materials Research Society 2008

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