Improvement of compaction rate of radioactive samples for gamma spectrometry using high power ultrasound

As interest of environmental radiation has increased, accurate analysis of the environmental radioactive sample has been demanded. The gamma ray spectroscopy is generally used to analyze the environmental radiation for solid radioactive samples such as soil compacted in a standard container. To improve the accuracy of the analysis, it is necessary to compact as much sample of the powder state as possible. Compacted amount of the sample and its density could be different depending on the force from measuring person in the case of conventional method using a compacting rod. In this study, we propose a method to improve the compacting rate with high power ultrasound for solid radioactive sample of powder state.