| Zugriffsnummer | 12835 |
| Dokumenttyp | Bericht |
| Sprache | Englisch |
| Titel | The Recombination Correction and the Dependence of the Response of Plane Parallel Chambers on the Polarizing Voltage in Pulsed Electron and Photon Beams |
| Autor(in); Institution |
Roos, Martin; 6.22, Dosimetrie der Strahlung hoher Energie, PTB-Braunschweig
Derikum, Klaus; 6.22, Dosimetrie der Strahlung hoher Energie, PTB-Braunschweig
|
| Quelle/Jahr | Review of Data and Methods Recommended in the International Code of Practice for Dosimetry, The Use of Plane Parallel Ionization Chambers in High Energy Electron and Photon Beams Details:(2000), 53 - 64 |
| Schriftenreihe | IAEA Technical Reports Series: 381 ; IAEA TECDOC: 1173 |
| Herausgeber(in) |
Andreo, Pedro; IAEA, Österreich
|
| ISSN | 1011-4289 |
| URL | |
| Berichtsnummer | IAEA-TECDOC-1173 |
| Verlag | Wien, Österreich: IAEA |
| Freie Schlagworte | Recombination ; Plane Parallel Chambers |
| Zusammenfassung | Based on experimental investigation of the recombination effect in plane parallel chambers, a relation is deducted that allows the correction to be calculated from the electrode spacing and from the dose per pulse. It is shown that the uncertainties caused by the application of the Boag formula for volume recombination (recommended in the International Code of Practice TRS-381) amount to not more than about 0.1% for conventional beams. Calculated recombinations are compared wirh experimental results concerning the dependence of the response of various commercial plane parallel chambers on the polarizing voltage. Since it cannot be excluded that particular chambers collect a non-negligible amount of charge from regions outside the designated collecting volume or that the effective polarizing voltage is reduced by poor contacts, it seems advisable to experimentally check the chambers before use and before application of the analytical relations. |
