System for visualization of radionuclide distribution in samples of mountain rock

Author

Stepanov, V.E. ; Ivanov, O.P. ; Bahur, A.E.

Author_Institution

Russian Res. Centre, Kurchatov Inst., Moscow, Russia

Volume

48

Issue

4

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

1190

Lastpage

1193

Abstract

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

Keywords

X-ray imaging; natural radioactivity hazards; pollution measurement; radioactive pollution; rocks; solid scintillation detectors; charge-coupled device sensor; coordinate positioning; digital processing; image intensifier; mountain rock samples; natural radionuclides; radionuclide distribution visualisation; scintillating plate; technogenic pollution; Charge-coupled image sensors; Detectors; Image intensifiers; Optoelectronic and photonic sensors; Photonic crystals; Pollution measurement; Sensor systems; Spatial resolution; Visualization; Voltage;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.958748

Filename

958748