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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"Semiconductor Detectors"”.
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Thin-Film Semiconductor Detectors for 10.6 Microns Radiation
Made available in DSpace on 2014-12-12T20:54:20Z (GMT). No. of bitstreams: 1 7607023.pdf: 4583930 bytes, checksum: c9bcb9d18a0d8188b9ebceaa1295affa (MD5) Previous issue date: 1975
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Evaluation of room-temperature semiconductor detectors for ultrahigh resolution pet imaging
The evaluation of a room-temperature semiconductor detector for ultrahigh resolution positron emission tomography (PET) imaging is presented. The approach is based on the use of a CdTe semiconductor detector. The detector is a 2mm thick cadmium telluride (CdTe) detector with a pixel pitch of 350μm …
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Characterization of p-type silicon semiconductor detectors for use in in vivo dosimetry
… and/or the results of others using similar detectors. Variations in excess of +/-12 % were observed in high-energy wedged fields over the source-to-surface distances investigated. Reductions in local dose directly behind the diode due to electron shielding ranged from 8 to 12%. Entrance and …
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Multi-pixel charge sharing energy reconstruction (MCSER) algorithm with application in small-pixel semiconductor detectors
Small-pixel CdTe/CZT semiconductor detectors have shown great potential in medical imaging. However, most of current CZT detectors used in medical imaging applications still suffer serious performance degradation partially due to incomplete charge-collection. In this paper, we discuss a multi-pixel …
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Hybrid pixel-waveform semiconductor detectors: novel detector readout for semiconductor pet imaging of small animal neurodegenerative models
… of small pixel hybrid pixel-waveform (HPWF) CdTe detectors for PET by experimentally evaluating common performance criteria such as timing resolution, energy resolution, and spatial resolution with efforts aimed at deconstructing the performance limitations as a PET detector module intended for …
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Photoproduction of pi�� mesons from He3 with 340 MeV bremsstrahlung
… The recoil nuclei were observed with silicon semiconductor detectors. At least one gamma ray from the pion decay was detected with a lead glass Cherenkov counter. A coincidence between a semiconductor detector and the Cherenkov counter triggered an oscilloscope on which all pulses were then …
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Optimization Studies for the COBRA Neutrinoless Double-Beta Decay Experiment and Results from a Prototype
… Cadmium Zinc Telluride: CZT) room-temperature semiconductor detectors to search for the neutrinoless double-beta decay of cadmium-116. While the experiment has produced globally competitive half-life limits with data from coplanar-grid CZT detectors, a future ton-scale iteration could set …
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Position sensitive detectors in GaAs
… of gallium arsenide position sensitive detectors. These are aimed at various applications with the original motivation being experimental particle physics. An account is given of basic semiconductor physics relevant to particle detectors. A review of electronics applicable to reading out …
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Differential cross sections for the reaction He4(gamma, p)H3 from 55 to 165 MeV
… The triton detection system consisted of three semiconductor detectors followed by a plastic scintillator. The proton detection system consisted of four plastic scinti11ators and was large enough to cq11ect all protons correlated with tritons in the triton system. The pulses from the calibrated …
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Spectral Computed Tomography at High Photon Fluxes
The development of pixelated photon counting semiconductor detectors enables to resolve the spectral composition of the incident photons in X-ray imaging, provided that the detector is operated in the absence of pulse pile-up and sensor polarisation. The purpose of this study is to examine the …
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Absolute Quantification of Tc-99M Activity Distributions Using A Planar Molecular Breast Imaging Commercial System
… breast imaging (MBI) uses two dedicated-breast semiconductor detectors to visualize the preferential uptake of technetium-99m-sestamibi (<sup>99m</sup>Tc-sestamibi) by breast cancer cells relative to surrounding benign breast tissues. Clinically, MBI is used primarily as a supplementary tool to …
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Examining Thin Film AlSb for Room Temperature Gamma Detectors
A thin film semiconductor device was grown by MBE methods, characterized for material quality and evaluated for suitability as a room temperature gamma radiation detector. The objective was to produce a device that was superior to current semiconductor detectors, namely HPGe and CZT which have …
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Experimental study of the reaction He3 ([v], [pi+])H3 up to 260 MeV
… pions and four tl'ansmiss10ntype semiconduc1;or detectors for the tritons. Pulses froln the 'semiconductor detectors and the scintillators were displayed on a dual beam oscilloscope -.nd photographed. E and dE/dx relations were used for 'particle identification. Tritons with enere;ies between 9.7 …
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Development of high performance single photon emission computed tomography systems for simultaneous nuclear molecular imaging and magnetic resonance imaging
… photon-counting, and highly-pixelated CdTe semiconductor detectors. Preliminary studies demonstrated the system ability to track as few as 400 neural stem cells in a mouse brain with a sub-500 µm resolution. Although the MRC-SPECT-I was a state-of-the-art SPECT system, to further improve …
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Development of the MRC-SPECT-II system: a MR-compatible small-animal SPECT system based on semiconductor imaging spectrometers and a Synthetic Compound-Eye gamma camera design
… still mainly based on cumbersome scintillation detectors, characterized by poor energy and spatial resolution, the demand of high-performance SPECT instrumentation continues to rise. We have designed and fully developed the second-generation of a Magnetic Resonance (MR)-Compatible SPECT system, …
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Differential cross sections for the reaction He[superscript 3] ([gamma],[rho]) H[superscript 2] from 45 to 150 MeV
… detection system, which was a telescope of three semiconductor detectors followed by a plastic scintillator, actually defined the solid angle. The proton telescope of four plastic scintillators was large enough to intercept all protons correlated with deuterons in the deuteron telescope. …
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Development of novel emission tomography system
… the detector properties, both scintillation and semiconductor detectors are under active investigation for high resolution X-ray and gamma ray photon detection. The desired detector properties include high intrinsic spatial resolution, high energy resolution, and high detection efficiency. In …
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Establishment of the Physical and Technical Prerequisites for the Determination of the Relative Biological Effectiveness of Low-energy Monochromatic X-rays
… spectral dose distribution determination using semiconductor detectors have been performed. In addition, an unconventional system based on thermally stimulated exoelectron emission (TSEE) detectors, allowing to measure dose in a small volume and in the real cell environment has been tested and …
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The Security of Self-Differencing Avalanche Photodiodes for Quantum Key Distribution
… to being hacked are the single-photon detectors, often avalanche photodiodes (APDs), as they are directly exposed to the optical channel. Whilst measurement-device-independent QKD removes detector vulnerability from the system, secure key rates with this technique can be much lower than …