| 摘要 |
FIELD: the proposed scintillative detecting arrangement refers to the field of the environment protection, precisely to the field of registration of radioactive radiation and may be used for radioactive analysis of air and other gaseous mediums. ^ SUBSTANCE: the given scintillative detecting arrangement allows to determine concentration of radioactive substances in a gaseous medium in each moment of time during the whole time of measuring, to increase accuracy of measuring of the levels of pollution of the gaseous medium and to increase reliability of its work. The proposed arrangement includes a body provided with input and output openings. Inside the body there is a scintillative detector divided by a slit opening consisting of identical upper and low semi-cylinders of an inorganic scintillator and also of upper and low plate of organic scintillator, a photo electronic multiplier connected with its optical window with the scintillative detector, a filtration unit. At that the exterior surfaces of the upper and low plates of the organic scintillator are covered by layers of protecting material. The filtration unit is completely located in the slit opening of the scintillative detector and includes as components a box-shaped body of the inflation unit in whose end walls there are input and output distributing openings and also input and output box-shaped sealing nozzles provided with input and output sockets. At that the filter holds substances capable to tie together volatile gaseous radioactive compounds and is located diagonally inside the box-shaped body of the filtration unit and the input and output box-shaped sealing nozzles are located over the end parts of the box-shaped body of the filtration unit, form with its end walls hermetic gas chambers and hermetically adjoin to the layers of the protective material covering the exterior surfaces of the upper and the low plates of the organic scintillator. ^ EFFECT: allows to determine concentration of radioactive substances in a gaseous medium. ^ 7 dwg
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