Author/Authors :
Alpat، نويسنده , , Behcet and Aisa، نويسنده , , Damiano and Bizzarri، نويسنده , , Marco and Blasko، نويسنده , , Sandor and Esposito، نويسنده , , Gennaro and Farnesini، نويسنده , , Lucio and Fiori، نويسنده , , Emmanuel and Papi، نويسنده , , Andrea and Postolache، نويسنده , , Vasile and Renzi، نويسنده , , Francesca and Ionica، نويسنده , , Romeo and Manolescu، نويسنده , , Florentina and Ozkorucuklu، نويسنده , , Suat and Denizli، نويسنده , , Haluk and Tapan، نويسنده , , Ilhan and Ercan Pilicer and Egidi، نويسنده , , Felice and Moretti، نويسنده , , Cesare and Dicola، نويسنده , , Luca، نويسنده ,
Abstract :
Terradex project aims to realise an accurate and programmable multiparametric tool which will measure relevant physical quantities such as observation time, energy and type of all decay products of three naturally occurring decay chains of uranium and thorium series present in nature as well as the decay products of man-made radioactivity. The measurements described in this work are based on the performance tests of the first version of an instrument that is designed to provide high counting accuracy, by introducing self-triggering, delayed time-coincidence technique, of products of a given decay chain. In order to qualify the technique and to calibrate the Terradex, a 222Rn source is used. The continuous and accurate monitoring of radon concentration in air is realised by observing the alpha and beta particles produced by the decay of 222Rn and its daughters and tag each of them with a precise occurrence time. The validity of delayed coincident technique by using the state of the art electronics with application of novel data sampling and analysis methods are discussed. The flexibility of sampling protocols and the advantages of online calibration capability to achieve the highest level of precision in natural and man-made radiation measurements are also described.
Keywords :
RADON , radiation , environment , Self-triggering , contamination , Silicon detector
