Title :
System for visualization of radionuclide distribution in samples of mountain rock
Author :
Stepanov, V.E. ; Ivanov, O.P. ; Bahur, A.E.
Author_Institution :
Kurchatov (I.V.) Inst. of Atomic Energy, Moscow, Russia
Abstract :
The system is based on combined detector: scintillating plate+image intensifier+CCD sensor. At optimal choice of voltages its sensitivity allows the detection of single photon with energy higher than 60 keV. The specially prepared samples are located directly on a thin metal holder of a crystal. The detector has the spatial resolution of 0.3 mm. The developed technique of measuring and digital processing of raw images resulted in 2D maps of the radionuclide distributions and shadow X-ray images of samples. Superposition of the images gives coordinate positioning in founded distributions. For separation of gamma and beta radiation of the samples the filters of various thickness were applied. Examples of the images of rock slices with natural radionuclides and samples with technogenic pollution are presented
Keywords :
CCD image sensors; X-ray detection; beta-ray detection; gamma-ray detection; geophysical techniques; pollution measurement; position sensitive particle detectors; radioactive pollution; radioisotopes; rocks; solid scintillation detectors; 2D maps; CCD sensor; beta radiation; combined detector; coordinate positioning; digital processing; gamma radiation; image intensifier; mountain rock; natural radionuclides; radionuclide distribution; raw images; rock slices; scintillating plate; shadow X-ray images; spatial resolution; technogenic pollution; Detectors; Filters; Optoelectronic and photonic sensors; Photonic crystals; Pollution measurement; Sensor systems; Spatial resolution; Visualization; Voltage; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949213
