Instruments and detectors on the base of scintillator crystals ZnSe(Te), CWO, CsI(Tl) for systems of security and customs inspection systems

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 537; no. 1-2; pp. 424 - 430
• Main Authors: Ryzhikov, V.D., Opolonin, A.D., Pashko, P.V., Svishch, V.M., Volkov, V.G., Lysetskaya, E.K., Kozin, D.N., Smith, C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 21-01-2005
• Subjects: Multi-energy radiography; Two-energy detection method; X-ray digital radiography; Multi-energy radiography; 29.40.Mc; Two-energy detection method; X-ray digital radiography
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2004.08.056

Results of experimental studies of detector arrays scintillator-photodiode (S-PD) and scintillator-photoreceiving device (S-PRD) used for X-ray digital radiography have shown that there exist further possibilities to increase spatial resolution of this system up to 2–3 line pairs per mm. Theoretical analysis and experimental studies show that the two-energy detection method not only allows one to detect organics on the background of metal, but also substantially increases (by 3–5 times) the detection ability of the system as a whole, especially if parameters of the S-PD pair are optimized, in particular, when ZnSe(Te) is used in the low-energy circuit. A possibility to distinguish, in principle, between substances with insignificant differences in atomic number has been theoretically proven—by transition to multi-energy radiography. 3D-imaging has been realized using S-PD detector arrays. On base of theoretical and experimental search was installation of several types of inspection systems for control objects with square size 0.4×0.6–2.5×3.5m.