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Interface effects on dose distributions in irradiated media [electronic resource].

Published:
Oak Ridge, Tenn. : Oak Ridge National Laboratory, 1980.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
Pages: 15 : digital, PDF file
Additional Creators:
Oak Ridge National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
It has long been recognized that nonuniformities in dose distributions may occur in the immediate vicinity of a boundary between two different media. Considerable work has been done to determine interface effects in media irradiated by photons or in media containing ..beta..- or ..cap alpha..-particle emitters. More recently interface effects have become of interest in additional problems, including pion radiotherapy and radiation effects in electronic microcircuits in space vehicles. These problems arise when pion capture stars or proton-nucleus interactions produce a spectrum of charged nuclear fragments near an interface. The purpose of this paper is to examine interface effects in detail as to their specific origin. We have made Monte Carlo calculations of dose distributions near an interface in a systematic way for a number of idealized cases in order to indicate the separate influences of several factors including different stopping powers of the two media, nonconstancy (e.g., Bragg peak) in the energy loss curve for the particles, different particle spectra in the two media, and curvature of the boundary between the two media.
Report Numbers:
E 1.99:conf-800944-4
conf-800944-4
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Note:
Published through SciTech Connect.
01/01/1980.
"conf-800944-4"
7. symposium on microdosimetry, Oxford, UK, 8 Sep 1980.
Turner, J.E.; Wright, H.A.; Hamm, R.N.
Funding Information:
W-7405-ENG-26
View MARC record | catkey: 14793281