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Optically stimulated luminescence and thermoluminescence efficiencies for high-energy heavy charged particle irradiation in Al2O3:CThe thermally and optically stimulated luminescence (TL and OSL) response to high energy heavy-charged particles (HCPs) was investigated for two types of Al2O3:C luminescence dosimeters. The OSL signal was measured in both continuous-wave (CW) and pulsed mode. The efficiencies of the HCPs at producing TL or OSL, relative to gamma radiation, were obtained using four different HCPs beams (150 MeV/u 4He, 400 MeV/u 12C, 490 MeV/u 28Si, and 500 MeV/u 56Fe). The efficiencies were determined as a function of the HCP linear energy transfer (LET). It was observed that the efficiency depends on the type of detector, measurement technique, and the choice of signal. Additionally, it is shown that the shape of the CW-OSL decay curve from Al2O3:C depends on the type of radiation, and, in principle, this can be used to extract information concerning the LET of an unknown radiation field. The response of the dosimeters to low-LET radiation was also investigated for doses in the range from about 1-1000 Gy. These data were used to explain the different efficiency values obtained for the different materials and techniques, as well as the LET dependence of the CW-OSL decay curve shape. c2003 Elsevier Ltd. All rights reserved.
Document ID
20040093220
Acquisition Source
Johnson Space Center
Document Type
Reprint (Version printed in journal)
Authors
Yukihara, E. G.
(Oklahoma State University Stillwater, OK 74078-3072, United States)
Gaza, R.
McKeever, S. W. S.
Soares, C. G.
Date Acquired
August 21, 2013
Publication Date
February 1, 2004
Publication Information
Publication: Radiation measurements
Volume: 38
Issue: 1
ISSN: 1350-4487
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAG9-1332
Distribution Limits
Public
Copyright
Other

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