“…The depth of the ionization chamber should be small in the direction of the greatest variation in the dose distribution, and the volume of the chamber must be precisely known. Extrapolation chambers have been successfully used to extrapolate the ionization current to zero mall thickness (Rase and Pohlit 1962). If the walls are so thin that they make a negligible contribution to the total secondary electron emission which ionizes the air wit'hin the chamber, the material of which the wall is composed is not important.…”
THE SUB-COMBIITTEE ON 1LADIATIOX DOSIMETRY (SCRAD)? of the AJIERICAN ASSOCILYI'IOS O F PHYSICISTS IN MEDICINE ' Output ' intercomparison can be carried out with the recommended thimble chamber in the same phantom.
“…The depth of the ionization chamber should be small in the direction of the greatest variation in the dose distribution, and the volume of the chamber must be precisely known. Extrapolation chambers have been successfully used to extrapolate the ionization current to zero mall thickness (Rase and Pohlit 1962). If the walls are so thin that they make a negligible contribution to the total secondary electron emission which ionizes the air wit'hin the chamber, the material of which the wall is composed is not important.…”
THE SUB-COMBIITTEE ON 1LADIATIOX DOSIMETRY (SCRAD)? of the AJIERICAN ASSOCILYI'IOS O F PHYSICISTS IN MEDICINE ' Output ' intercomparison can be carried out with the recommended thimble chamber in the same phantom.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.