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Title: Application of the microhole and strip plate detector for neutron detection
Authors: Veloso, J. F. C. A. 
Amaro, F. 
Santos, J. M. F. dos 
Mir, J. A. 
Derbyshire, G. E. 
Stephenson, R. 
Rhodes, N. J. 
Schooneveld, E. M. 
Issue Date: Oct-2004
Publisher: IEEE
Citation: IEEE Transactions on Nuclear Science 51:5 (2004) 2104-2109
Abstract: We introduce the microhole and strip plate (MHSP) detector as a micropattern detector for the detection of thermal and epithermal neutrons. Detection sensitivity is obtained by filling these detectors with 3He at high pressures. We propose the use of argon-xenon penning mixtures as the stopping gas as opposed to the usual carbon based stopping gases. These argon-xenon mixtures provide suitable gas gains for the high pressure/high resolution neutron detector applications. With these mixtures it is possible to obtain a sealed detector with only rare-gas filling which is simple to purify and not subject to ageing. An MHSP gas detector filled with a 3-bar argon/50-mbar xenon/6-bar helium mixture can achieve gains above 2×103. This mixture allows neutron detection efficiencies of about 70% at 1 Å for a 2.5-cm thick absorption region and intrinsic position resolution (full-width at half-maximum) of about 1.8 mm. The sensitivity to γ-rays of the present mixture will be the same when compared to that of 2.6-bar CF4
ISSN: 0018-9499
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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