| Zugriffsnummer | 29564 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | Development of a low-level radon reference atmosphere |
| Autor(in); Institution |
Linzmaier, Diana; 6.1, Radioaktivität, PTB-Braunschweig
Röttger, Annette; 6.1, Radioaktivität, PTB-Braunschweig
|
| Quelle/Jahr | 6th International Conference on Radionuclide Metrology - Low Level Radioactivity Measurement Techniques. Applied Radiation and Isotopes: 81 (2013), 208 - 211 |
| ISSN | 0969-8043 |
| DOI | |
| Verlag | Amsterdam: Elsevier |
| Konferenzangaben | 6th International Conference on Radionuclide Metrology Low-Level Radioactivity Measurement Techniques, (ICRM-LLRMT’12), Jeju, 17-21, September, 2012, Korea |
| Freie Schlagworte | Radon ; Emanation ; Calibration ; Reference atmosphere ; Metrology |
| Zusammenfassung | In order to calibrate measurement devices for the activity concentration of Rn-222 (radon) in air below 1000 Bq/m3, a constant for long time () 5 d), homogeneous reference atmosphere is created by a certified activity in a certified volume. The PTB developed this reference atmosphere from 150 Bq/m3 to 2000 Bq/m3 based on the precisely known emanation of Rn-222 from Ra-226 activity standard. This set-up reduces uncertainties and increases the range of traceability for commercial radon measurement devices. Thus, a gap in radon metrology is closed. The new primary standard for reference atmospheres is realised with a combined relative standard uncertainty of 1.1 %. |
