Hyper pure gamma-ray spectrometry applied to low-level environmental sample measurements
P. Bouisset, D. Calmet
Esarda report EUR 17312 (1997) 73-81
Workshop on the status of measurement techniques for the identification of nuclear signatures, Geel, belgium, 25-27/02/1997
Because man made radioactivity in the environment has constantly decreased, efforts are made to develop ever more efficient equipment and procedures so as to lower the detection limits in measuring facilities. For direct measuring of environmental samples by germanium hyper-pure gamma-ray spectrometry, laboratory has resorted to detection devices and related shielding selected for their lowest possible contamination levels and to measuring with anticoincidence methods in order to reduce the impulse input not attribuable to photoelectric peaks that are characteristic of the studied radionuclides. This paper describes background levels from different measuring configurations as well as the results obtained for samples representing environmentally caracteristic matrices such as aerosols, plants and sediments.