R. Lorenzelli1 , A. Rizzo1 , S. Salvi1 , L. Sannino1 , P. Bartolomei1
1Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Rome, Italy
One major effort in OSI laboratory field activity is to ensure a high sample throughput for gamma spectrometry analysis. Most of the typical analysed samples, such as soils, are supposed to be within the environmental range of activity, and it is very important to screen out any anomaly in the gamma spectra of the samples. A multi-sample holder, with two separate layers, has been designed, fabricated and tested for the purpose of analysing simultaneously up to 13 samples with a defined geometry. This approach, allowing the screening of a large number of samples and the ganging of samples according to the OSI search logic strategy, has been tested effectively during IFE14. In this work the procedure for the identification of the sample with anomalous concentration has been further explored. Spiked samples have been measured in different positions of the holder (upper and lower layers) in order to record the response of the detector and to compare the different efficiencies of the positions. The analysis of the data will represent a starting point for the design of a fast and efficient screening procedure for sample ganging measurements.