ISSN - 01689002, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1998, vol. 419, p. 290-294
Photon counting and integrating analog gaseous detectors for digital scanning radiography
In this paper we consider two types of gaseous detectors for radiography. The first one, the Multiwire Proportional Chamber, is used at present as a part of the digital radiographic system. It works in counting mode, has a quantum efficiency of 30% and a spatial resolution of 0.6 mm. Our new detector, the Multistrip Ionisation Chamber, is filled with Xe at 10 atm., has a quantum efficiency up to 70% and a spatial resolution of 0.4 mm. This method with integration of collected charge allows to avoid the problems of counting rate and gas ageing and considerably reduces the cost of electronics. © 1998 Elsevier Science B.V. All rights reserved.