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Title: Radiation-induced transient darkening of optically transparent polymers

Abstract

Results are presented for the radiation-induced transient darkening of thin organic polymer films normally used as Cerenkov light emissions sources. The radiation source is a 27-MeV, 10-..mu..C, 200-ns electron beam generated by the PHERMEX accelerator. The typical dose for a single pulse is 5 Mrad. At this dose, the broadband time-resolved percent transmission above 520 nm was measured for four common polymers: polyimide (Kapton-H), polyethylene terephthalate (Mylar), cellulose acetate, and high-density polyethylene. Kapton was found to darken the most and polyethylene darkened the least. The recovery time to normal transmission for Kapton was found to be greater than 10--20 ..mu..s. The radiation-induced attenuation coefficient is shown to depend on electronic band energy separation. The results show that Kapton is not the material of choice for a Cerenkov light source.

Authors:
; ; ; ;
Publication Date:
Research Org.:
P. O. Box 1663, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
OSTI Identifier:
5229635
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Appl. Phys.; (United States); Journal Volume: 60:10
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ACETATES; PHYSICAL RADIATION EFFECTS; IMIDES; MYLAR; POLYETHYLENES; POLYMERS; CHERENKOV RADIATION; ELECTRON BEAMS; ELECTRON COLLISIONS; LIGHT TRANSMISSION; MEV RANGE 10-100; OPTICAL PROPERTIES; BEAMS; CARBOXYLIC ACID SALTS; COLLISIONS; ELECTROMAGNETIC RADIATION; ENERGY RANGE; ESTERS; LEPTON BEAMS; MATERIALS; MEV RANGE; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; ORGANIC POLYMERS; PARTICLE BEAMS; PETROCHEMICALS; PETROLEUM PRODUCTS; PHYSICAL PROPERTIES; PLASTICS; POLYESTERS; POLYOLEFINS; RADIATION EFFECTS; RADIATIONS; SYNTHETIC MATERIALS; 360406* - Materials- Polymers & Plastics- Radiation Effects- (-1987)

Citation Formats

Downey, S.W., Builta, L.A., Carlson, R.L., Czuchlewski, S.J., and Moir, D.C.. Radiation-induced transient darkening of optically transparent polymers. United States: N. p., 1986. Web. doi:10.1063/1.337594.
Downey, S.W., Builta, L.A., Carlson, R.L., Czuchlewski, S.J., & Moir, D.C.. Radiation-induced transient darkening of optically transparent polymers. United States. doi:10.1063/1.337594.
Downey, S.W., Builta, L.A., Carlson, R.L., Czuchlewski, S.J., and Moir, D.C.. 1986. "Radiation-induced transient darkening of optically transparent polymers". United States. doi:10.1063/1.337594.
@article{osti_5229635,
title = {Radiation-induced transient darkening of optically transparent polymers},
author = {Downey, S.W. and Builta, L.A. and Carlson, R.L. and Czuchlewski, S.J. and Moir, D.C.},
abstractNote = {Results are presented for the radiation-induced transient darkening of thin organic polymer films normally used as Cerenkov light emissions sources. The radiation source is a 27-MeV, 10-..mu..C, 200-ns electron beam generated by the PHERMEX accelerator. The typical dose for a single pulse is 5 Mrad. At this dose, the broadband time-resolved percent transmission above 520 nm was measured for four common polymers: polyimide (Kapton-H), polyethylene terephthalate (Mylar), cellulose acetate, and high-density polyethylene. Kapton was found to darken the most and polyethylene darkened the least. The recovery time to normal transmission for Kapton was found to be greater than 10--20 ..mu..s. The radiation-induced attenuation coefficient is shown to depend on electronic band energy separation. The results show that Kapton is not the material of choice for a Cerenkov light source.},
doi = {10.1063/1.337594},
journal = {J. Appl. Phys.; (United States)},
number = ,
volume = 60:10,
place = {United States},
year = 1986,
month =
}