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AbstractAbstract
[en] The present invention relates to a method and apparatus for studying the spatial distribution of the radioactivity of a radiating object. According to the invention, use is made of a proportional particle counter, the anode of which is constituted by a resistive wire in a parallel direction with the object surface and placed in a gas-filled chamber under high potential. The pulses provided by the same electron avalanche, hitting the anode and reaching both ends thereof are compared. The difference between these pulses corresponds to the difference between their paths along the anode, and thus gives the avalanche position. The detection is improved by placing the object inside the chamber and by using the descriminator for eliminating those pulses corresponding to particles with inclined paths. This can be applied to the study of phenomena in which the tracer used is tritium or carbon 14
[fr]
La presente invention est relative a un procede et un appareillage pour l'etude de la repartition spatiale de la radioactivite d'un objet emettant un rayonnement. Selon l'invention, on utilise un compteur proportionnel de particules dont l'anode est constituee d'un fil resistant tendu parallelement a la surface de l'objet placee a l'interieur d'une chambre remplie de gaz, et mise sous tension elevee. On compare les impulsions provenant de la meme avalanche electronique sur l'anode et parvenant aux deux extremites de celle-ci. La difference entre ces impulsions correspond a la difference du trajet qu'elles ont parcouru le long de l'anode, et fournit donc la position de l'avalanche. On ameliore la detection en placant l'objet a l'interieur de la chambre et en eliminant a l'aide d'un discriminateur les impulsions correspondant a des particules a trajectoires obliques. Ceci est applicable a l'etude de phenomenes ou l'on utilise comme marqueur le tritium ou le carbone 14Original Title
Procede et appareillage pour l'etude de la repartition spatiale de la radioactivite d'un objet emettant un rayonnement
Source
25 Apr 1974; 10 p; FR PATENT DOCUMENT 2279114/A/; Available from Institut National de la Propriete Industrielle, Paris (France).
Record Type
Patent
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