| Zugriffsnummer | 18909 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Low level gamma-ray spectrometry at the PTB underground laboratory UDO |
| Autor(in); Institution |
Neumaier, Stefan; 6.3, Strahlenschutzdosimetrie, PTB-Braunschweig
Arnold, Dirk; 6.1, Radioaktivität, PTB-Braunschweig
|
| Quelle/Jahr | Isotopes in environmental studies - Aquatic Forum 2004 : proceedings of an international conference held in Monaco, 25 - 29 October 2004 ; unedited papers:(2006), 533 - 537 |
| Schriftenreihe | IAEA-CSP-26 |
| ISBN | 92-0-111305-X |
| Verlag | Vienna: IAEA |
| Konferenzangaben | International Conference on Isotopes in Environmental Studies - Aquatic Forum 2004, Monte-Carlo, 25-29, October, 2004, Monaco |
| Zusammenfassung | A new ultra low level background (ULB) gamma-ray spectrometry system has been installed 925 m below ground at the underground laboratory "UDO" of the Physikalisch-Technische Bundesanstalt, Braunschweig. This new system, consisting of a 95% coaxial HPGe-detector and a passive shielding (20 cm of low-activity lead, 10 cm electrolytic copper and radon suppression ny N2-flushing), will be described. Most of the peak count rates are less than 1 count per day and the integral background count rate in the energy range from 40 keV to 2750 keV is about 20 h-1. This system was especially used to determine very small concentrations of 60Co in environmental samples from Hirsohima and Tokai-mura and very small concentrations of long-lived radionuclides in meteorites. Results from these applications will be reported. |
