| Zugriffsnummer | 17209 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Environmental scatter |
| Autor(in); Institution |
Chartier, Jean-Louis; Institut de Radioprotection et de Sûreté Nuclèaire, Fontenay aux Roses, FRANCE
Siebert, Bernd R. L.; Q.102, Numerische Physik, PTB-Braunschweig
|
| Quelle/Jahr | Intercomparison on the usage of computational codes in radiation dosimetry:(2004), 261 - 276 |
| Herausgeber(in) |
Gualdrini, G.
|
| ISBN | 88-8286-114-7 |
| Verlag | Rome: ENEA |
| Konferenzangaben | Intercomparison on the Usage of Computational Codes in Radiation Dosimetry, Bologna, 14-16, July, 2003, Italy |
| Zusammenfassung | Problem P6 treats environmental scatter in a so-called bunker room. A bunker room is enclosed by thick concrete walls. Neutron sources are placed in the centre of the room. By placing a shadow cone between source and detector one is able to discriminate the albedo from the walls and in part the scatter from air and thus to infer the unperturbed neutron spectrum of the source. Although spectra of conventional sources, e.g. Cf (bare or D2O-moderated) and AmBe, are extensively used for calibrating dosimetric devices, they are also considered to be poorly representative of workplace spectra against which those instruments should be calibrated. The spectra obtained in a bunker with a shadow cone in place have proved to replicate more closely some spectral workplace characteristics, and consequently are deemed suitable for calibrating dosimeters. For such fields the practical terminology “realistic spectra“ is also used. Transport calculations play an important role for the analysis of spectra. Therefore, problem P6 features realistic tasks, which require a skilful use of fluence estimators and variance reduction techniques. |
