Position Sensitive Germanium Detectors For Gamma Ray Imaging And Spectroscopy
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Position Sensitive Germanium Detectors For Gamma Ray Imaging And Spectroscopy
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Author :
language : en
Publisher:
Release Date : 2000
Position Sensitive Germanium Detectors For Gamma Ray Imaging And Spectroscopy written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Three Dimensional Position Sensitive Germanium Detectors Annual Report For Emsp Project Number 65015
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Author :
language : en
Publisher:
Release Date : 2000
Three Dimensional Position Sensitive Germanium Detectors Annual Report For Emsp Project Number 65015 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
This study focuses on the radioactive materials characterization needs of DOE's decontamination and decommissioning effort. Gamma-ray imaging and spectroscopy together form a potentially powerful tool for the passive, non-destructive and non-intrusive identification and spatial mapping of contaminated structures. Germanium position-sensitive gamma-ray detectors offer the advantage of excellent energy resolution required for clear isotopic identification combined with potentially high spatial resolution. The authors propose a program of research to develop three-dimensional position-sensitive germanium detectors with the ultimate goal of improving image resolution without cameras. With the addition of depth-of-interaction sensing to conventional two-dimensional position-sensitive detectors, they will be able to greatly reduce the image degradation effects caused by Compton scattering and parallax, thereby increasing the resolving power of the detectors. The technology developed will form the basis for the design and fabrication of future high-performance gamma-ray imaging cameras.
Gamma Ray Imaging For Environmental Remediation Grier
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Author :
language : en
Publisher:
Release Date : 2000
Gamma Ray Imaging For Environmental Remediation Grier written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Germanium detector systems with both high spectral resolution and good imaging capabilities to the problems of environmental remediation. Over the last year, much progress has been made. We have (1) developed and built amorphous-contact germanium detectors of increasing sophistication, (2) built and tested an array of four position sensitive germanium detectors, (3) demonstrated spectroscopy and imaging uses with 235U, and Results from this research were presented at the EMSP's first workshop in Chicago in 1998, at the SPIE Session in July 1999, and at the IEEE Nuclear Science Symposium in November 1998 and 1999. AMORPHOUS CONTACTS The goal of the amorphous contact effort was to extend the single element (pixel) amorphous technology developed by Luke et al. (1994) to double-sided orthogonal strip detectors. Amorphous contact provides multiple advantages over the current lithium contact technology. We have fabricated the first orthogonal strip detector with dimensions appropriate for field use. The detector has an active volume of 50 mm x 50 mm x 10 mm and has 25 x 25 strips (see Figure 1). It is currently undergoing tests. The resolution is (almost equal to)12 keV FWHM, which is dominated by electronic noise. The noise was high because of the large capacitance and the non-optimal electronics used with the test cryostat.
Three Dimensional Position Sensitive Germanium Detectors
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Author :
language : en
Publisher:
Release Date : 2001
Three Dimensional Position Sensitive Germanium Detectors written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Critical to the DOE effort to deactivate and decommission the weapons complex facilities is the characterization of contaminated equipment and building structures. This characterization includes the isotopic identification of radioactive contaminants and the spatial mapping of these deposits. The penetrating nature of the gamma rays emitted by the radioactive contaminants provides a means to accomplish this task in a passive, non-destructive and non-intrusive manner. Through conventional gamma-ray spectroscopy, the radioactive isotopes in the contaminants can be identified by their characteristic gamma-ray signatures and the amount of each isotope by the intensity of the signature emission. With the addition of gamma ray imaging, the spatial distributions of the isotopes can simultaneously be obtained. The ability to image radioactive contaminants can reduce waste as well as help ensure the adequate protection of workers and the environment. For example, if equipment and building materials have been subjected to radionuclide contamination, the entire structure must be treated as radioactive waste during demolition. However, only partial removal may be necessary if the contamination can be accurately located and identified. Hand-held survey instrumentation operated in the near vicinity of the contaminated objects is a common method to accomplish this task. This method necessitates long data acquisition times, direct close access, and considerable worker exposure, as well as leads to imprecise information. In contrast, imaging devices operated at a distance from the contaminated objects can accurately acquire the spatially dependent gamma-ray emission information in a single measurement. Consequently, the devices can more efficiently discriminate between contaminated and non-contaminated areas of heterogeneous objects while at the same time reducing worker exposure.
Gamma Ray Imaging With Position Sensitive Hpge Detectors
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Author :
language : en
Publisher:
Release Date : 2004
Gamma Ray Imaging With Position Sensitive Hpge Detectors written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Cdznte Position Sensitive Drift Detectors For Spectroscopy And Imaging Of Gamma Ray Sources
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Author :
language : en
Publisher:
Release Date : 2016
Cdznte Position Sensitive Drift Detectors For Spectroscopy And Imaging Of Gamma Ray Sources written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Three Dimensional Position Sensitive Geranium Detectors
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Author :
language : en
Publisher:
Release Date : 1999
Three Dimensional Position Sensitive Geranium Detectors written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
A critical component of the DOE decontamination and decommissioning effort is the characterization of radioactively contaminated equipment and structures. Gamma-ray spectroscopy and imaging with germanium (Ge) based detectors are powerful techniques that allow for the quick and accurate in-situ identification, spatial mapping, and quantification of radioactive contaminants. However, the image resolution obtained with a Ge detector can be limited by the accuracy to which the gamma-ray interaction events are spatially detected within the detector itself. Our primary objective is to develop the technologies necessary to produce Ge gamma-ray detectors with enhanced accuracy in locating gamma-ray interaction events thereby resulting in improved image resolution. Our approach is to locate the gamma ray interaction events within the detector in all three dimensions rather than just two. Additionally, we will base the detectors on known and tested LBNL fabrication technologies and utilize the simplest possible detector geometries and signal-readout electrode structures in order to reduce the system complexity and difficulties in fabrication. The technologies developed as a result of this research will form the basis for the design and construction of future high-performance gamma-ray imaging systems. These instruments will greatly facilitate DOE's radioactive materials characterization process.
Emsp Project Number 65015 Final Report
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Author :
language : en
Publisher:
Release Date : 2001
Emsp Project Number 65015 Final Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Critical to the DOE effort to deactivate and decommission the weapons complex facilities is the characterization of contaminated equipment and building structures. This characterization includes the isotopic identification of radioactive contaminants and the spatial mapping of these deposits. The penetrating nature of the gamma rays emitted by the radioactive contaminants provides a means to accomplish this task in a passive, non-destructive and non-intrusive manner. Through conventional gamma-ray spectroscopy, the radioactive isotopes in the contaminants can be identified by their characteristic gamma-ray signatures and the amount of each isotope by the intensity of the signature emission. With the addition of gamma-ray imaging, the spatial distributions of the isotopes can simultaneously be obtained. The ability to image radioactive contaminants can reduce waste as well as help ensure the adequate protection of workers and the environment. For example, if equipment and building materials have been subjected to radionuclide contamination, the entire structure must be treated as radioactive waste during demolition. However, only partial removal may be necessary if the contamination can be accurately located and identified. Hand-held survey instrumentation operated in the near vicinity of the contaminated objects is a common method to accomplish this task. This method necessitates long data acquisition times, direct close access, and considerable worker exposure, as well as leads to imprecise information. In contrast, imaging devices operated at a distance from the contaminated objects can accurately acquire the spatially dependent gamma-ray emission information in a single measurement. Consequently, the devices can more efficiently discriminate between contaminated and non-contaminated areas of heterogeneous objects while at the same time reducing worker exposure.
A 2d Position Sensitive Germanium Detector For Spectroscopy And Polarimetry Of High Energetic X Rays
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language : en
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A 2d Position Sensitive Germanium Detector For Spectroscopy And Polarimetry Of High Energetic X Rays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Imaging Characteristics Of Position Sensitive Germanium Detectors
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Author : Patrick Charles Rose
language : en
Publisher:
Release Date : 1980
Imaging Characteristics Of Position Sensitive Germanium Detectors written by Patrick Charles Rose and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Germanium diodes categories.