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System for visualization of radionuclide distribution in samples of mountain rock

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3 Author(s)
Stepanov, V.E. ; Russian Res. Centre, Kurchatov Inst., Moscow, Russia ; Ivanov, O.P. ; Bahur, A.E.

The system for visualization of radionuclide distribution in samples of mountain rock is based on a combined detector: scintillating plate + image intensifier + charge-coupled device sensor. At optimal choice of voltages, its sensitivity allows the detection of single photons with energy higher than 60 keV. The specially prepared samples are located directly on a thin metal holder of a crystal. The detector has a spatial resolution of 0.3 mm. The developed technique of measuring and digital processing of raw images resulted in two-dimensional maps of the radionuclide distributions and shadow X-ray images of samples. Superposition of the images gives coordinate positioning in measured distributions. For separation of gamma and beta radiation of the samples, filters of various thickness were applied. Examples of images of rock slices with natural radionuclides and samples with technogenic pollution are presented

Published in:

Nuclear Science, IEEE Transactions on  (Volume:48 ,  Issue: 4 )

Date of Publication:

Aug 2001

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