arXiv subjects

Craig F. Smith

Publications and source records attributed to Craig F. Smith.

2 recordsLinked to original sources

arXiv2006

Multi-Energy Radiography Against Terrorism. Theory and Experiments

Multi-energy radiography is a new direction in non-destructive testing. Its specific feature is separate detection of penetrating radiation in several energy channels. Multi-energy radiography allows quantitative determination of the atomic composition of objects. This is its principal advantage over conventional radiography. In particular, dual-energy radiography allows determination of the effective atomic number of a material with an accuracy of up to 80-90%. Development of three-energy radiography and radiography of higher multiplicity makes it possible to further improve the reconstruction of an objects chemical composition. This presents the possibility, for example, of detection of explosives and other illegal objects in luggage with a reliability approaching 100%. These developments can find application not only in anti-terrorist activities, but also in areas such as industrial testing and nuclear medicine.

physics.ins-det↗

arXiv2003

Direct reconstruction of the effective atomic number of materials by the method of multi-energy radiography

A direct method is proposed for reconstruction of the effective atomic number by means of multi-energy radiography of the material. The accuracy of the method is up to 95% . Advantages over conventional radiographic methods, which ensure accuracy of just about 50%, are discussed. A physical model has been constructed, and general expressions have been obtained for description of the effective atomic number in a two-energy monitoring scheme. A universal dependence has been predicted for the effective atomic number as a function of relative (two-energy) radiographic reflex. The established theoretical law is confirmed by the experimental data presented. The proposed development can find multiple applications in non-destructive testing and related fields, including those in the civil sphere as well as anti-terrorist activities.

physics.acc-ph↗