期刊
RADIATION PHYSICS AND CHEMISTRY
卷 79, 期 5, 页码 575-582出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2010.01.002
关键词
Buildup factor; Gamma ray; Effective atomic number; Thermoluminescence; Dosimetry; Tissue equivalence
Gamma ray energy-absorption buildup factors were computed using the five-parameter geometric progression (G-P) fitting formula for seven thermoluminescent dosimetric (TLD) materials in the energy range 0.015-15 MeV, and for penetration depths up to 40 mfp (mean free path). The generated energy-absorption buildup factor data have been studied as a function of penetration depth and incident photon energy. Buildup factors determined in the present work should be useful in radiation dosimetry, diagnostics and therapy. The tissue equivalence of TLD materials is also discussed. (C) 2010 Elsevier Ltd. All rights reserved.
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