Conveners
O3.2 Radionuclide Technologies and Applications
- Anders Ringbom (Swedish Defence Research Agency (FOI))
- Nikolaus Helmut Hermanspahn (CTBTO Preparatory Commission)
An effort is underway to update the Radionuclide Aerosol Sampler Analyzer that is currently deployed by the International Monitoring System with one of the objectives being to increase the frequency of sample collection while maintaining or improving detection sensitivity. Detection efficiency will be increased using a pair of high purity germanium detectors, which will surround the sample...
The International Monitoring System (IMS) of CTBTO includes sixteen radionuclide laboratories, one of them is the Brazilian Laboratory (BRL04) at the Institute of Radiation Protection and Dosimetry in Rio de Janeiro, which is not certified to analyze IMS station filters but has consistently performed well in proficiency test exercises organized by the Provisional Technical Secretariat....
FRL08 operates a system for very low-level measurement of fission products, named Gamma3. In addition to classical gamma spectrometry, it can operate in coincidence mode by. The low probability of coincidence events is compensated by high signal-to-noise ratio and much lower detection limits, facilitating the qualitative and quantitative characterisations of samples with a large number of...
This study presents a 4πβ (plastic scintillator)–γ coincidence detection system developed with the integration of machine learning to optimize the absolute activity measurement of radionuclides. A hardware setup utilizing a CAEN N5751 digitizer employed a pulse shape discrimination procedure to process signals from the detectors and generate binary list-mode files representing the measurement...
Laboratory measurements of air samples can be used as a complement to measurements at the IMS station. Such measurements are performed today on a regular basis for the particulate stations within the IMS. Laboratory re-measurements of radioxenon samples, however, are not yet fully implemented in the verification regime. To study the benefits and restrictions for re-measurements of radioxenon...
Creare has developed an electrostatic precipitator (ESP) for high volume atmospheric aerosol collection. Previously, we demonstrated a laboratory-based ESP system with limited flow rates. With this work, we have demonstrated well over 80% collection efficiencies of 0.2–0.3 µm particles at significantly higher flow rates and lower pressure drop than the current RASA system. The particles are...
