| Zugriffsnummer | 20990 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | Experimental comparison of 241Am-Be neutron fluence energy distributions |
| Autor(in); Institution |
Lebreton, L.; Institut de Radioprotection et de Sureté Nucléaire, Saint-Paul-Lez-Durance, FRANCE
Zimbal, Andreas; 6.5, Neutronenstrahlung, PTB-Braunschweig
Thomas, D.; National Physical Laboratory, Teddington, UK
|
| Quelle/Jahr | Progress in dosimetry of neutrons and light nuclei : Tenth International Symposium on Neutron Dosimetry. Radiation Protection Dosimetry: 126 (2007), 1/4, 3 - 7 |
| ISSN | 0144-8420 |
| ISBN | 978-0-19-954273-4 |
| DOI | |
| Verlag | Oxford: Oxford University Press |
| Konferenzangaben | 10th Symposium on Neutron Dosimetry, NEUDOS 10, Uppsala, 12-16, June, 2006, Sweden |
| Zusammenfassung | 241 Am-Be(α,n) neutron sources provide one of the most commonly used neutron fields for routine calibration of neutron sensitive devices. The neutron energy distribution of the IRSN standard 241 Am-Be source was measured in the energy region above 1.65 MeV using a BC501A proton-recoil liquid scintillator. The experimental data were compared to the ISO-recommended neutron energy distribution for an 241 Am-Be source. Some differences in shape were observed, with large variations mainly within the energy interval 3-6 MeV and around 8 MeV. Within the framework of a collaboration between three national metrological institutes (PTB, Germany; NPL, UK and LNE-IRSN, France), the neutron energy distributions of 241 Am-Be sources at each laboratory have been compared. The IRSN-BC501A proton-recoil scintillator was used to measure all the sources. The results show different energy distributions a priori influenced by the origin of the source, i.e. the manufacturing process. The maximum deviation observed for the integral dose equivalent, in the measured BC501A energy range, is within the 4% uncertainty recommended by ISO standard 8529-2 to allow for variations of the neutron spectrum among different 241 Am-Be sources. However, knowledge of the energy distribution of an 241 Am-Be source provides a way to reduce the uncertainty in the dose equivalent rate delivered by such a source. |
