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Radiation parameters of 6 to 20 MeV scanning electron beams from the Saturne linear accelerator
Author(s) -
Pfalzner P. M.,
Clarke H. C.
Publication year - 1982
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 - 10.1118/1.595230
Subject(s) - betatron , microtron , electron , range (aeronautics) , linear particle accelerator , physics , atomic physics , ionization chamber , nuclear physics , radiation , dosimetry , ionization , particle accelerator , nuclear medicine , beam (structure) , materials science , optics , ion , medicine , quantum mechanics , composite material
Depth doses of the scanning electron beams from the Saturne Therac–20 linear accelerator at nominal energies of 6,9,13,17, and 20 MeV were measured in polystyrene using a thin window parallel plate ionization chamber. Central axis depth dose curves are derived and are analyzed according to the method of Brahme and Svensson. 2 For each of the five electron energies, values are obtained for the most probable energy at the absorber surface E p,0 , the practical range R p , the 50% range R 50 , the therapeutic range R 85 , the electron dose gradients, total collision energy losses, and other radiation parameters, and these are compared to corresponding values for electron beams from a 22 MeV medical microtron and a 20 MeV betatron.