title: W values of protons in alkane-based TE gases and dimethylether in the energy range 1-100 keV: measurements and additivity models.
abstract: W values of tissue-equivalent gases based on propane and butane were measured for protons in the energy range 1-100 keV and compared with those of dimethylether and water vapour. The experimental values of the tissue-equivalent gas mixtures were compared with data calculated from the W values of the mixture components using five existing additivity models and two new models derived within the scope of the present work. Apart from one model--the simplest one--all models show a good agreement with the experimental data.
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany. baek@ptb.de
authors.forename: W Y
authors.initials: WY
authors.lastname: Baek
authors.forename: B
authors.initials: B
authors.lastname: Grosswendt
authors.forename: G
authors.initials: G
authors.lastname: Willems
mesh_terms: D000465:Algorithms; D000473:Alkanes / Q000737:chemistry / Q000528:radiation effects*; D001822:Body Burden; D003198:Computer Simulation; D005740:Gases / Q000737:chemistry / Q000528:radiation effects; D018499:Linear Energy Transfer; D008738:Methyl Ethers / Q000737:chemistry / Q000528:radiation effects*; D008956:Models, Chemical; D009502:Neutrons; D011522:Protons; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods; D011868:Radioisotopes / Q000032:analysis / Q000737:chemistry; D011874:Radiometry / Q000379:methods*; D012062:Relative Biological Effectiveness
chemical_list: D000473:Alkanes; D005740:Gases; D008738:Methyl Ethers; D011522:Protons; D011868:Radioisotopes; C033413:dimethyl ether