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2 edition of Comparison if CdTe and CdZnTe crystals for radiation detection found in the catalog.

Comparison if CdTe and CdZnTe crystals for radiation detection

Lee Talbot

Comparison if CdTe and CdZnTe crystals for radiation detection

by Lee Talbot

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Published .
Written in English


Edition Notes

Thesis (M.Sc.) - University of Surrey,1994.

StatementLee Talbot.
ContributionsUniversity of Surrey. Department of Physics.
ID Numbers
Open LibraryOL19592373M

Comparison of characterization methods for CdTe/ CdZnTe radiation detector materials and development of an automated test system Winkler, Alexander GND Single crystal cadmium telluride (CdTe) and cadmium zinc telluride (CZT) are semiconductors with a suitable band gap to operate as room temperature radiation detectors with low noise. Piero L. Chirco, MariaPia Morigi, Martina Zanarini, Anna D.M. Cavallini, B. Fraboni, Natalia Auricchio, Ezio Caroli, Waldes Dusi, Paul Fougeres, Makram Hage-Ali, and Paul Siffert "Comparison of the radiation damage induced by thermal neutrons in CdTe and CdZnTe detectors", Proc. SPIE , Hard X-Ray, Gamma-Ray, and Neutron Detector Physics.

  Over the last two decades, the II–VI semiconductors CdTe and CdZnTe (CZT) has emerged as the material of choice for room temperature detection of hard X-rays and soft techniques of growing the crystals, the design of the detectors, and the electronics used for reading out the detectors have been considerably improved over the last few years. Inclusions Elimination and Resistivity Restoration of CdTe:Cl Crystals by Two-Step Annealing - IEEE Trans. Nucl. Sci. CdZnTe and CdTe materials for X-ray and gamma ray radiation detector applications - physica status solidi (b) In-text: (Szeles, ) Your Bibliography: Szeles, C., CdZnTe and CdTe materials for X-ray and.

  We obtained high-quality CdTe x Se 1−x (CdTeSe) crystals from ingots grown by the vertical Bridgman technique. The compositional uniformity of the ingots was evaluated by X-ray fluorescence at BNL’s National Synchrotron Light Source X27A beam line. The compositional homogeneity was highly uniform throughout the ingot, and the effective segregation coefficient of Se . In recent years, room temperature semiconductor detectors like CdTe and CdZnTe have been proposed for several scientific, industrial and medical applications. In some cases, these applications require the capability to operate for a long time in intense, sometimes mixed, radiation fields while retaining full spectroscopic performances. In spite of its importance, a detailed characterization of.


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Comparison if CdTe and CdZnTe crystals for radiation detection by Lee Talbot Download PDF EPUB FB2

Among the compound semiconductors, CdTe and CdZnTe have attracted growing interests in the development of X-ray and gamma ray detectors [5,6].Due to the high atomic number, the high density and the wide band gap, CdTe and CdZnTe detectors ensure high detection efficiency, good room temperature performance and are very attractive for X-ray and gamma ray by:   We developed a new concept of X- and γ-ray radiation semiconductor detectors based on a large area graphene/semi-insulating single crystal CdTe Cited by: 1.

CdTe(Cl) detectors from CdTe single crystals, grown by the Bridgman method from Te-rich melt, were fabricated. The quality of the detectors was tested with 57 Co and Am sources. In the 57 Co spectrum low noise is demonstrated by the presence of a 14 keV peak and good resolution ≈7 keV (FWHM) evident from the separation of and keV peaks.

A review is given of the state-of-the Cited by:   Cadmium telluride (CdTe) crystals exceeding 1 kg in size were synthesized from elemental Cd and Te sources with purity comparable to state-of-the-art gamma ray detector crystals. In addition, synthesis of highly-doped CdTe feedstock for thin film photovoltaics applications demonstrating effective incorporation of group V (As, Sb) dopants was Author: Tawfeeq K.

Al-Hamdi, Tawfeeq K. Al-Hamdi, Seth W. McPherson, Santosh K. Swain, Joshah Jennings, Joel. The best radiation detector crystals corresponded to those grown with an excess tellurium of % (by weight in the starting CdZnTe charge) grown at a rate of to mm/h with an imposed.

The charge transport properties and radiation detector performance of semi-insulating CdTe single crystals grown by the conventional vertical Bridgman technique are reported in this paper.

The measured room-temperature electrical resistivity of the crystals (ρ ≅ × Ωcm) is below the theoretical maximum allowed by the band gap of CdTe (ρ. @article{osti_, title = {Characterization of Etch Pit Formation via the Everson-Etching Method on CdZnTe Crystal Surfaces from the Bulk to the Nano-Scale}, author = {}, abstractNote = {A combination of atomic force microscopy, optical microscopy, and mass spectrometry was employed to study CdZnTe crystal surface and used etchant solution following exposure of the CdZnTe crystal to the.

Simulated photo peak efficiency of CdTe and CdZnTe gamma cameras Physical model Simulation results 7. Radiation hardness issues Dose determination CMOS electronics Silicon detectors CdTe and CdZnTe detectors 8. Conclusions References. Cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) have been regarded as promising semiconductor materials for hard X-ray and /spl gamma/-ray detection.

The high atomic number of the materials (Z/sub Cd/=48, Z/sub Te/=52) gives a high quantum efficiency in comparison with Si.

The large bandgap energy (Eg/spl sim/ eV) allows us to operate the detector at room temperature. leakage current for the CdTe detector measured at 5 C and the CdTe diode (described later) at 20 C.

The dimensions of the CdTe diode is 2 2 mm3 are shown for comparison. The CdZnTe detector was manufactured by eV Products and the CdTe detector was manufactured by ACRORAD.

properties of the wafer are very important aspect not only for. The edge surfaces of single crystal CdTe play an important role in the electronic properties and performance of this material as an X-ray and γ-ray radiation detector.

Cadmium telluride (CdTe) is a stable crystalline compound formed from cadmium and is mainly used as the semiconducting material in cadmium telluride photovoltaics and an infrared optical is usually sandwiched with cadmium sulfide to form a p–n junction solar PV cell.

Typically, CdTe PV cells use a n-i-p structure. Advances in the Crystal Growth of Semi-Insulating CdZnTe for Radiation Detector Applications.

IEEE Trans. Nucl. Sci. 49, (). ADS CAS Article Google Scholar. A. Winkler, Comparison of characterization methods for CdTe/ CdZnTe radiation detector materials and development of an automated test system, Diplomarbeit, Friedrich-Schiller-Universität Jena.

Google Scholar. Publications, Patents and Books. Patents. Patent title, “Low-cost, High Compositional Uniformity Cd 1-x Zn x Te 1-y Se y for Radiation Detector Applications”, Under Review by Office of Intellectual Property, ; Patent title, “Improved Contacts of Radiation Detectors for Detecting/Imaging X-rays and Gamma-rays”, Under Review by Office of Intellectual Property, 2 days ago  In contrast, the materials with the low deep-level density, like semiconductor radiation detector materials (e.g., CdTe, CdZnTe, etc.), usually exhibit a complex response to applied bias, depending on the surface conditions.

We show that a single exponential fit does not represent the true relaxation time and resistivity, in this case. Cadmium zinc telluride selenide (CdZnTeSe) is a new semiconductor material for gamma-ray detection and spectroscopy applications at room temperature.

It has very high crystal quality compared to similar materials such as cadmium telluride and cadmium zinc telluride. The consistency of peak position in radiation detection devices is important to practical applications. Purchase Semiconductors for Room Temperature Nuclear Detector Applications, Volume 43 - 1st Edition.

Print Book & E-Book. ISBNOver the last decade, cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) wide band gap semiconductors have attracted increasing interest as X-ray and gamma ray detectors. Among the traditional high performance spectrometers based on silicon (Si) and germanium (Ge), CdTe and CdZnTe detectors show high detection efficiency and good room temperature performance and are.

commercialization of both CdTe and CdZnTe crystals. Today, SI CdZnTe crystals are available commercially and the CdZnTe based room-temperature radiation detectors and detector arrays are steadily gaining acceptance in many medical, industrial, security, safeguards and scientific X-ray and γ-ray imaging and spectroscopic applications.1,2 3.

Afterwards, the crystal temperature was reduced to 15 K and then heated to K at the same heating rate, so that the dark current spectrum of CdZnTe crystal was obtained for comparison. The current spectrum under light irradiation was subtracted from the dark current spectrum to .The authors have developed an innovative method for eliminating the effects of hole trapping in radiation detectors made from compound semiconductors, such as CdTe or CdZnTe.

The technique involves placing one or more additional electrodes on or near the surface of the detector, biased for optimum charge collection at the signal electrode.for radiation detection: The device is designed for spectrometry of gamma-rays, quantitative and qualitative analysis of radio nuclides.

It includes CdTe or CdZnTe detector and low-noise preamplifier with comparators serving as integrated discriminators.