Mathematical Models of Radiation Transparency of Test Objects When Using Sandwich X-Ray Radiation Detectors

• Published in: Russian journal of nondestructive testing Vol. 56; no. 2; pp. 161 - 170
• Main Authors: Udod, V. A., Vorobeichikov, S. E., Nazarenko, S. Yu
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-02-2020; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Energy methods; Materials Science; Mathematical analysis; Mathematical models; Object recognition; Radiation detectors; Radiation Methods; Sensors; Structural Materials; material recognition; sandwich detector; dual-energy method; X-ray radiation; effective atomic number; inspection control
• ISSN: 1061-8309; 1608-3385
• DOI: 10.1134/S1061830920020096

A mathematical model of the output signals of an X-ray sandwich detector is presented. Based on this model, two mathematical models of the radiation transparency of the test object for a sandwich radiation detector have been developed. These models are the basis for a theoretical assessment of the accuracy of recognizing materials using the corresponding implementation scheme of the dual-energy method. The fundamental difference between the developed models is that one of them does and the other does not take into account statistical dependence between the output signals of the sandwich detector. Recommendations on the preference for using each of these models are given.