| Zugriffsnummer | 30872 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | Development of a transfer standard for the measurement of low Rn-222 activity concentration in air |
| Autor(in); Institution |
Linzmaier, Diana; 6.1, Radioaktivität, PTB-Braunschweig
Röttger, Annette; 6.1, Radioaktivität, PTB-Braunschweig
|
| Quelle/Jahr | Applied Radiation and Isotopes: 87 (2014), 306 - 309 |
| ISSN | 0969-8043 (PRINT) ; 0883-2889 (ONLINE) |
| DOI | |
| Verlag | Amsterdam: Elsevier |
| Konferenzangaben | 19th International Conference on Radionuclide Metrology and its Applications (ICRM2013), Antwerpen, 17-21, June, 2013, Belgium |
| Freie Schlagworte | Radon ; α-Spectrometry ; Calibration ; Reference atmospheres ; Metrology |
| Zusammenfassung | A large volume transfer standard has been developed to calibrate commercial radon measurement devices in a homogeneous Rn-222 reference atmosphere. The transfer standard serves for the realization, maintenance and dissemination of the unit Bq/m3 below 1 kBq/m3. The transfer standard consists of a multi-wire impulse ionization chamber, electronic measurement equipment and the corresponding software. The multi-wire impulse ionizatiion is composed of two parallel printed boards. Between the boards, 478 vertical elctrode wires are soldered in to include a volume of 10 L. In the dependency of the energy, the α-particles of Rn-222 and the decay products are detectes in the active volume of the multi-wire impulse ionization chamber. By means of the measurement software an α-energy spectrum is produced. Via different algorithms, the activity concentration of the Rn-222 reference atmosphere is determined. |
