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Title: High-pressure operation of a xenon-GPSC/MSGC hybrid detector for hard X-ray spectrometry
Authors: Coelho, L. C. C. 
Veloso, J. F. C. A. 
Covita, D. S. 
Ferreira, L. F. Requicha 
Santos, J. M. F. dos 
Keywords: Gas scintillation; High pressure; Csl photocathode; Gamma-rays
Issue Date: 2006
Citation: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 569:3 (2006) 796-802
Abstract: The performance of a high-pressure xenon gas proportional scintillation counter/microstrip gas chamber (GPSC/MSGC) hybrid detector has been investigated for filling pressures from 1 up to 10 bar, for 22-, 30- and 60-keV photons. GPSC/MSGC hybrid detectors are based on a xenon-GPSC instrumented with a CsI-coated microstrip plate photosensor placed directly within the xenon envelope, as a substitute for the photomultiplier tube. This design avoids the constraints due to the use of a quartz scintillation window for GPSC-photosensor coupling, which absorbs a significant amount of scintillation and is a drawback for applications where large detection areas and high filling pressures are needed. The lowest energy resolutions are achieved for 2 bar (5.5% and 3.4%, FWHM, for 22- and 60-keV photons, respectively). Increasing the pressure to the 5-6 bar range, competitive energy resolutions of 7% and 4.5% are still achieved for 22- and 60-keV photons, respectively. This detector could be a compelling alternative in applications where compactness, large detection area, insensitivity to strong magnetic fields, room temperature operation, large signal-to-noise ratio and good energy resolution are important requirements.
DOI: 10.1016/j.nima.2006.09.061
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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