A New Technique for Gaseous Radiation Detectors: The Multigrid High-Pressure Xenon Gas Proportional Scintillation Counter

A new technique is presented for high-pressure gaseous radiation detectors leading to pulse amplitudes at least one order of magnitude larger than in ionization-chamber-based gamma-ray detectors. The technique uses room-temperature pure Xe or Xe-based gaseous mixtures at pressures of about 5-20 bar...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2010-08, Vol.57 (4), p.2205-2209
Main Authors: Borges, Filipa I G M, do Carmo, Sergio J C, Mariquito, João C R, Trindade, Alexandre M F, Conde, Carlos A N
Format: Article
Language:English
Subjects:
Cathodes
Electroluminescence
Gamma ray detectors
gaseous detectors
high-pressure xenon
Ionizing radiation
multigrid detector
Production
proportional scintillation
Prototypes
Radiation detectors
Scintillation counters
secondary scintillation
Solid scintillation detectors
Stimulated emission
Xenon
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Summary:A new technique is presented for high-pressure gaseous radiation detectors leading to pulse amplitudes at least one order of magnitude larger than in ionization-chamber-based gamma-ray detectors. The technique uses room-temperature pure Xe or Xe-based gaseous mixtures at pressures of about 5-20 bar (or higher) to detect ionizing radiation in a multigrid high-pressure gas proportional scintillation counter (MGHP-GPSC) with a CsI deposit as the photocathode in direct contact with the gas, with no optical windows. The detector relies on secondary scintillation as the amplification stage followed by photoelectron production in a CsI photocathode layer. Experimental results are presented for a small prototype filled with pure Xe up to 5 bar, showing that the principle of operation of the detector works. The maximum detector gain obtained so far is about 10.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2010.2052930