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Calculated Bragg curves for ionization chambers of different shapes
Author(s) -
Bichsel Hans
Publication year - 1995
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.597535
Subject(s) - extrapolation , bragg peak , detector , ionization , diode , proton , optics , ionization chamber , physics , materials science , silicon , computational physics , dosimetry , particle detector , proton therapy , atomic physics , nuclear physics , nuclear medicine , ion , optoelectronics , mathematics , statistics , medicine , quantum mechanics
Bragg curves for proton beams are different in shape if measured with different detectors, such as silicon diodes, extrapolation, and thimble chambers. Calculations with an analytic algorithm are presented which show that such differences are caused, at least in part, by the shapes of the detectors. Similar differences must be expected for all beams of heavy charged particles. Dose conversion factors representing the conversion of a measured dose into dose in water are discussed.