Pulse Rise Time Characterization of a High Pressure Xenon Gamma Detector for use in Resolution Enhancement

Conference · Fri Aug 25 04:00:00 EDT 2000

OSTI ID:804476

TROYER, G L ^[1]

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1. FH

High pressure xenon ionization chamber detectors are possible alternatives to traditional thallium doped sodium iodide (NaI(Tl)) and hyperpure germanium as gamma spectrometers in certain applications. Xenon detectors incorporating a Frisch grid exhibit energy resolutions comparable to cadmium/zinc/telluride (CZT) (e.g. 2% {at} 662keV) but with far greater sensitive volumes. The Frisch grid reduces the position dependence of the anode pulse risetimes, but it also increases the detector vibration sensitivity, anode capacitance, voltage requirements and mechanical complexity. We have been investigating the possibility of eliminating the grid electrode in high-pressure xenon detectors and preserving the high energy resolution using electronic risetime compensation methods. A two-electrode cylindrical high pressure xenon gamma detector coupled to time-to-amplitude conversion electronics was used to characterize the pulse rise time of deposited gamma photons. Time discrimination was used to characterize the pulse rise time versus photo peak position and resolution. These data were collected to investigate the effect of pulse rise time compensation on resolution and efficiency.

• Research Organization: FH (US)
• Sponsoring Organization: USDOE Office of Environmental Management (EM) (US)
• DOE Contract Number: AC06-96RL13200
• OSTI ID: 804476
• Report Number(s): HNF-6815-FP, Rev.0
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ENERGY RESOLUTION
GAMMA DETECTION
GAMMA SPECTROMETERS
IONIZATION CHAMBERS
PERFORMANCE
PULSE RISE TIME
RESOLUTION
XENON