Gamma Ray Imaging For Environmental Remediation Grier
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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.
Gamma Ray Imaging For Environmental Remediation
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Author : E. A. Wulf
language : en
Publisher:
Release Date : 2004
Gamma Ray Imaging For Environmental Remediation written by E. A. Wulf 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.
This program is the development of germanium strip detectors for environmental remediation. It is a collaboration between the Naval Research Laboratory and Lawrence Berkeley National Lab. The goal is to develop detectors that are simultaneously capable of excellent spectroscopy and imaging of gamma radiation.
Suomen Historia
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Author :
language : en
Publisher:
Release Date :
Suomen Historia 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.
Gamma Ray Imaging For Environmental Remediation 1998 Annual Progress Report
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Author :
language : en
Publisher:
Release Date : 1998
Gamma Ray Imaging For Environmental Remediation 1998 Annual Progress 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 1998 with categories.
The objective of this research is the development of high resolution germanium detector systems for direct imaging of spent nuclear fuels and fissile materials and Compton scatter imaging of large objects of arbitrary size. A small configuration of detectors shall be assembled to demonstrate the performance of such a system. The efforts in this first year of a three year program have been focused on the design and procurement of a four detector array of germanium strip detectors. The basic detector is a 5 cm x 5 cm x 1 cm thick planar germanium detector with segmented anode and cathode. These segmentations are in the form of strips with a pitch of 2 millimeters. The strips on the anode side run orthogonal to the strips on the cathode side so that, in a gamma-ray interaction, the collection of electrons and holes on opposite electrodes produces signals which identify the interaction position in two dimensions. Each detector in the array has 25 anode contacts and 25 cathode contacts. The detector array has been designed as a planar array providing 100 square centimeters of active area mounted in a single cryostat. To reduce electronics channel count, parallel strips from adjacent detectors are electrically joined together effectively making strips that are 10 cm long. In this configuration, 100 channels of electronics are required to readout the array. In a related project, the authors are investigating processes to produce improved contacts for germanium strip detectors which would offer both more reliable extended use and the potential for finer strip pitch or position resolution. Investigating amorphous contacts, they have, to date, prepared two Ge test detectors. One was produced using n-type Ge and the other p-type Ge. The p-type detector has a Li diffused contact on one side while the n-type detector has a B ion-implanted contact. Amorphous contacts have been formed on the opposite side of each detector by RF sputtering. They are currently conducting a series of leakage current versus operating temperature measurements in order to determine the barrier heights of the amorphous contacts. The use of n and p type detectors will allow us to measure the electron and hole blocking behavior of the contacts respectively. This will provide important information on the nature of these contacts and will determine if double-sided strip detectors can be produced using only amorphous contacts.
Environmental Assessment For Gamma Imaging Inspection Systems
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Author :
language : en
Publisher:
Release Date : 2007
Environmental Assessment For Gamma Imaging Inspection Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Gamma rays categories.
Gamma Ray Imaging System Innovative Technology Summary Report
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Author :
language : en
Publisher:
Release Date : 1998
Gamma Ray Imaging System Innovative Technology Summary 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 1998 with categories.
The RadScan 600 gamma-ray imaging system is designed to survey large surface areas for radiological contamination with accuracy and efficiency. The resulting survey data are clear, concise, and precise in describing how much contamination is present at exact locations. Data can be permanently stored electronically and on video tape, making storage and retrieval economical and efficient. This technology can perform accurate measurements in high radiation contamination areas while minimizing worker exposure. The RadScan 600 system is a safe and effective alternative to hand-held radiation detection devices. Performance data of the demonstrated survey area of the RadScan 600 system versus the baseline, which is the hand-held radiation detection devices (RO-2 and RO-7) for a given survey, production rate is 72% of the baseline. It should be noted that the innovative technology provides 100% coverage at a unit cost of $8.64/m2 versus a static measurement of a unit cost of $1.61/m2 for the baseline.
Quantitative Nuclear Medicine Imaging
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Author : International Atomic Energy Agency
language : en
Publisher:
Release Date : 2014
Quantitative Nuclear Medicine Imaging written by International Atomic Energy Agency and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Medical categories.
This publication reviews the current state of the art of image quantification and provides a solid background of tools and methods to medical physicists and other related professionals who are faced with quantification of radionuclide distribution in clinical practice. It describes and analyses the physical effects that degrade image quality and affect the accuracy of quantification, and describes methods to compensate for them in planar, single-photon emission computed tomography (SPECT) and positron emission tomography (PET) images.
Environmental Degradation Causes And Remediation Strategies
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Author : Vinod Kumar
language : en
Publisher: Agro Environ Media, Publication Cell of AESA, Agriculture and Environmental Science Academy,
Release Date : 2020-03-10
Environmental Degradation Causes And Remediation Strategies written by Vinod Kumar and has been published by Agro Environ Media, Publication Cell of AESA, Agriculture and Environmental Science Academy, this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-10 with Young Adult Nonfiction categories.
The compliance of this book is helpful for academicians, researchers, students, as well as other people seeking the relevant material in current trends of studies on the topic of environmental degradation.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Radiation Protection And Management Of Norm Residues In The Phosphate Industry
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Author : International Atomic Energy Agency
language : en
Publisher:
Release Date : 2013
Radiation Protection And Management Of Norm Residues In The Phosphate Industry written by International Atomic Energy Agency and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Technology & Engineering categories.
This Safety Report is a compilation of detailed information on the processes and materials associated with the phosphate industry and on the radiological considerations that need to be taken into account by the regulatory body when determining the nature and extent of radiation protection measures. It has been developed as part of the IAEA's programme on the application of its safety standards in the field of radiation, transport and waste safety. The information provided will assist in the implementation of a graded approach to regulation, in terms of which the application of the requirements of the safety standards is commensurate with the characteristics of the practice or source and with the magnitude and likelihood of the exposures. The publication also provides information on expected radionuclide concentrations, exposure levels and the most appropriate regulatory approach in the phosphate industry and covers the mining and beneficiation of phosphate ore, phosphoric acid production, phosphogypsum, and the manufacture and use of phosphatic fertilizers among others.