| Zugriffsnummer | 12904 |
| Dokumenttyp | Bericht |
| Sprache | Englisch |
| Titel | Basic physical data in organic gases |
| Autor(in); Institution |
Großwendt, Bernd; 6.201, Grundlagen der Dosimetrie, PTB-Braunschweig
Baek, Woon Yong; 6.201, Grundlagen der Dosimetrie, PTB-Braunschweig
|
| Quelle/Jahr | Radiation quality assessment based on physical radiation interaction at nanometre level:(2000), 5 - 26 |
| Schriftenreihe | LNL-INFN report: 161 |
| Herausgeber(in) |
Colautti, Paolo; INFN, Laboratori Nazionali di Legnaro, ITALY
|
| Berichtsnummer | LNL-INFN-REP-161 |
| Verlag | Legnaro: LNL |
| Freie Schlagworte | Messung doppelt-differentieller Wirkungsquerschnitte von Elektronen in Gasen ; Messung von Elektronen W-Werten in Propan ; Monte-Carlo-Modell für langsame Elektronen in Gasen |
| Zusammenfassung | The detailed knowledge of charged-particle track structure is a prerequisite to a better understanding of modern proportional-counter or ionization-chamber measuring devices which might be used to determine quantities appropriate for purposes of risk assessment, independently of radiation quality. Because of this fact, a Monte Carlo model was developed which is well-suited to perform track-structure calculations with respect to the electron degradation in pure organic gases or in frequently used tissue-equivalent gas mixtures. The main problem that had to be solved for this purpose was the construction of comprehensive sets of electron interaction cross sections for the gaseous systems of interest. Unfortunately, most of the available data are restricted to atoms (noble gases) or to the simplest molecules such as oxygen or nitrogen, and data for organic molecules, for instance, propane or butane are missing, at least in parts. In this context, data for dimethylether (DME) are of particular importance as this gas is well suited for nanodosimetric measurements and could become the favourite filling gas in future generations of radiation monitoring devices. In order to develop the Monte Carlo model to perform track structure calculations with respect to the electron slow-down in tissue-equivalent gas mixtures and to improve our knowledge with respect to basic physical data for gases which are used in present-day or future generations of radiation monitoring devices, electron scattering cross sections in N2, CO2, CH4, C3,H8 and DME; preliminary total double-differential electron cross sections in CH4, C3 H8 and DME; and electron W values in C3H8, propane-based tissue-equivalent gas mixture, and DME were measured and presented in tabular form. |
