caa a22 4500 397503806 CHVBK 20180308164539.0 cr unu---uuuuu 161202e19950801xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082796 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082796 The Energy Dependence of W Values for Protons of Energies up to 10 MeV [Elektronische Daten] [B. Grosswendt, W.Y. Baek] The behaviour of the mean energy W required to produce an ion pair in gases as a function of the primary energy of charged particles is still not completely understood, in particular for protons and heavier particles. As a contribution to solving this problem, an analytical model based on the continuous slowing down approximation has been applied to determine the energy dependence of W for protons slowed down in molecular nitrogen, methane, carbon dioxide, water vapour and methane-based tissue-equivalent gas in the energy range up to 10 MeV. Besides the proton stopping powers for calculating the energy degradation, the effect of charge exchange, different ionisation cross sections for protons and neutral hydrogen particles, and the contributions of secondary electrons were taken into account in the determination of the ionisation yield. This procedure led to a qualitatively satisfactory agreement between the calculated W values and those determined experimentally in the whole energy region. Radiation Protection Dosimetry Grosswendt B. aut Baek W.Y. aut Radiation Protection Dosimetry Oxford University Press 61/1-3(1995-08-01), 267-274 0144-8420 61:1-3<267 1995 61 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082796 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082796 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grosswendt B. aut NATIONALLICENCE 700 1- Baek W.Y. aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 61/1-3(1995-08-01), 267-274 0144-8420 61:1-3<267 1995 61 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford