نتایج جستجو برای: scintillation detector
تعداد نتایج: 63384 فیلتر نتایج به سال:
We are developing a new type of photon detector in preparation of an experiment to search for muons decaying into positrons and gamma rays. In the experiment, the photon detector will utilize liquid xenon (Xe) as the scintillation material because of its fast response, large light yield, and high density. The scintillation light emitted in liquid Xe will be observed directly by positioning phot...
ArDM is a new-generation WIMP detector which will measure simultaneously light and charge from scintillation and ionization of liquid argon. Our goal is to construct, characterize and operate a 1 ton liquid argon underground detector. The project relies on the possibility to extract the electrons produced by ionization from the liquid into the gas phase of the detector, to amplify and read out ...
We are exploring the possibility of using PIN photodiodes to readout the scintillation crystals used in Positron Emission Tomography (PET) detector designs. Solid state photodetectors typically have a lower signal to noise ratio than photomultiplier tubes (PMTs). However, they have the advantage of compactness, and, thus, scintillation crystal readout schemes not available to PMTs because of th...
Results of tests on NaI scintillation crystals operated at cryogenic temperatures are described. Crystals grown using both the Bridgeman-Stockbarger and Czochralski techniques were tested. Light output and scintillation pulse shape properties are assessed as functions of temperature using gamma and 252 Cf neutron sources and the results are interpreted with a view to optimising detector perform...
The radioisotope techniques used for the measurement of gastric emptying of solid meals in man require complex and expensive scintiscanners of cameras. We have evaluated a simple technique which uses a fixed scintillation detector and compared the results with those obtained from a gamma camera. The rates and patterns of gastric emptying recorded by the two methods correlated well in both healt...
Microstructured optical fibers containing alkali halide scintillation materials of CsI(Na), CsI(Tl), and NaI(Tl) are presented. The scintillation materials are grown inside the microstructured fibers using a modified BridgmanStockbarger technique. The x-ray photon counts of these fibers, with and without an aluminum film coating are compared to the output of a collimated CdTe solid state detect...
An 800 l liquid xenon scintillation γ ray detector is being developed for the MEG experiment which will search for μ → eγ decay at the Paul Scherrer Institut. Absorption of scintillation light of xenon by impurities might possibly limit the performance of such a detector. We used a 100 l prototype with an active volume of 372×372×496 mm to study the scintillation light absorption. We have devel...
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