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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 11 of 11 for “"Cadmium zinc telluride"”.
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Photoluminescence study of cadmium zinc telluride
… defects in bulk CdZnTe, (2) determining the zinc concentration in these crystals, and (3) identifying the nature of room-temperature PL. PL spectra at 5 K was used to determine the bandgap and hence the zinc concentrations. In the current state-of-the-art CZT grown for radiation detectors, it …
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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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Modeling and control of cadmium zinc telluride grown via an electro-dynamic gradient freeze furnace.
… processing methods to grow 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 …
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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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X-ray diagnostics for the Levitated Dipole Experiment
… by a four channel pulse height analyzer using cadmium zinc telluride detectors. In addition, a single sodium iodide detector, which views energies up to 3 MeV, measures the intensity of the hot electron population. The electron temperature may be inferred from the x-ray energy. X-ray …
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Purification of Cd, Zn and Te for CdZnTe growth
Purification of cadmium, zinc and tellurium was attempted to improve the quality of cadmium-zinc-telluride (CdZnTe) crystal growth. Specifically, vacuum distillation, zone refining and H[subscript]2 gas flow assisted zone refining were all investigated as methods to purify the constituent elements …
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Substrate cleaning using a remote hydrogen rf-plasma
… function of exposure to the hydrogen plasma. For cadmium mercury 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 …
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Enhancing PEPT: high fidelity analysis techniques with augmented detection systems
… Previous work 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 …
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Enhancing PEPT: high fidelity analysis techniques with augmented detection systems
… Previous work 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 …
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Measurements and modeling of Lower Hybrid Driven fast electrons on Alcator C-Mod
… the plasma cross-section. 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 …
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Pulse-shape studies with coplanar grid CdZnTe detectors and searches for rare nuclear decays with the COBRA experiment
… COBRA experiment searching 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 …