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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 18 of 18 for “"Czt"”.
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Emission tomography through advanced 3-D position-sensitive CZT spectrometers
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Experimental evaluation of Compton-enhanced PET imaging with 3-D CZT imaging sensors
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01
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Optimization Studies for the COBRA Neutrinoless Double-Beta Decay Experiment and Results from a Prototype
The COBRA experiment uses 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 …
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Characterization of single-sided cadmium zinc telluride strip detectors for high energy astrophysics applications
<p>Cadmium zinc telluride (CdZnTe or CZT) was introduced as a new room temperature semiconductor detector due to its good energy resolution, high atomic number, high density and good stopping power in the early 1990s. UNH has focused on developing CZT strip detector designs for astrophysical …
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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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Photoluminescence study of cadmium zinc telluride
… concentrations. In the current state-of-the-art CZT grown for radiation detectors, it is common to observe 5-K PL spectra dominated by donor-bound exciton emission (D 0, X). Also, a deep acceptor-bound exciton (A0, X) related to a complex associated with Cd vacancies is usually detected. Thus, it …
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Substrate cleaning using a remote hydrogen rf-plasma
… telluride (CMT) and cadmium zinc telluride (CZT) the hydrogen plasma readily removes the oxide and an amorphous Te overlayer left behind by standard wet chemical processing of these substrates. Following the removal of these layers the H-plasma etches HgTe, in the case of CMT, and CdTe, in …
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Building a Hybrid Compton Camera System for Improving Medical Imaging Applications
… a hybrid setup, combining a commercial Polaris-J CZT de-tector as the scatterer layer with a 2” × 2” LaBr3:Ce detector as the absorber. CC2 and CC3 incorporated novel MacroPixel LB-14x25c-SiPM-T scintillation detector assemblies using a va-riety of different physical configurations. CC2 was …
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Pulse-shape studies with coplanar grid CdZnTe detectors and searches for rare nuclear decays with the COBRA experiment
… for 0νββ-decays with cadmium zinc telluride (CZT) solid state detectors. The detector material CZT acts as a semiconductor at room temperature and contains intrinsically several candidates for rare nuclear transitions. The experiment is located at the LNGS underground facility in Italy, which …
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Modeling and control of cadmium zinc telluride grown via an electro-dynamic gradient freeze furnace.
… bulk, single crystal cadmium zinc telluride (CZT) in a vertical Bridgman (VB) furnace. Additionally, we investigate new mathematical algorithms for improved solving capability of equations that describe such crystal growth systems. A two-dimensional crystal growth model for the simulation of …
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Sub-Millimetre Positron-Emission Particle Tracking Using a CdZnTe Semiconductor Array
… resolution to implement PEPT. Using a PolarisJ CZT detector module array built by H3D Inc. (Ann Arbor, MI, USA) with a field-of-view of 40 × 60 × 20 mm3 , a positron-emitting 22Na source (1 mm diameter) with an activity of 20 kBq was located in three-dimensional space with a radial location …
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Examining Thin Film AlSb for Room Temperature Gamma Detectors
… current semiconductor detectors, namely HPGe and CZT which have different limitations due to intrinsic material characteristics. AlSb was chosen because of its desirable properties which include the high atomic number of antimony (Z = 51), relatively large band gap (Eg = 1.6 eV), and theorized …
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Elektrochemische Legierungsabscheidung zur Herstellung von Cu2ZnSnS4 Dünnschichtsolarzellen
… geeigneten Verbindungshalbleiter Cu2ZnSnS4 (CZTS) und Cu2ZnSnS(4-x)Sex (x<3, CZTSSe) konnten erfolgreich durch Kombination der elektrochemischen Legierungsabscheidung und der anschließenden Sulfurisierung in H2S-haltiger Atmosphäre hergestellt werden. In früheren Arbeiten wurden die viel …
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Enhancing PEPT: high fidelity analysis techniques with augmented detection systems
… with a pair of pixelated cadmium zinc telluride (CZT) room temperature semiconductors (9680 pixels of 1.8 x 1.8 x 0.5 mm3) exhibited potential in micro-scale PEPT, but achievable location rates and field of view (FOV) were limiting. To address these issues, a modular bismuth germanate oxide (BGO) …
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Enhancing PEPT: high fidelity analysis techniques with augmented detection systems
… with a pair of pixelated cadmium zinc telluride (CZT) room temperature semiconductors (9680 pixels of 1.8 x 1.8 x 0.5 mm3) exhibited potential in micro-scale PEPT, but achievable location rates and field of view (FOV) were limiting. To address these issues, a modular bismuth germanate oxide (BGO) …
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Measurements and modeling of Lower Hybrid Driven fast electrons on Alcator C-Mod
… Each chord ends at a cadmium zinc telluride (CZT) detector that detects individual x-ray photons as current pulses. The output from these detectors is shaped and digitized. Post-processing of the raw pulse train allows for flexible time and energy binning. Another diagnostic for detecting fast …
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Room temperature semiconductor detector performance enhancement for multi-energy spect imaging system development and its application in alpha emitter radiopharmaceutical therapy
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Development of high performance single photon emission computed tomography systems for simultaneous nuclear molecular imaging and magnetic resonance imaging
Simultaneous nuclear molecular imaging (NMI) and magnetic resonance imaging (MRI) have great potential for pre-clinical and clinical applications, especially for cell imaging in brain cancer models. We have pursued an intensive research effort to develop high-performance single-photon emission …