Radioactivity Calibrations With The 4 Pi Gamma Ionization Chamber And Other Radioactivity Calibration Capabilities
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Radioactivity Calibrations With The 4 Pi Gamma Ionization Chamber And Other Radioactivity Calibration Capabilities
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Author : Jacqueline M. Calhoun
language : en
Publisher:
Release Date : 1987
Radioactivity Calibrations With The 4 Pi Gamma Ionization Chamber And Other Radioactivity Calibration Capabilities written by Jacqueline M. Calhoun and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Ionization chambers categories.
Monthly Catalogue United States Public Documents
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Author :
language : en
Publisher:
Release Date : 1992-11
Monthly Catalogue United States Public Documents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992-11 with Government publications categories.
Monthly Catalog Of United States Government Publications
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Author :
language : en
Publisher:
Release Date :
Monthly Catalog Of United States Government Publications 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 Government publications categories.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1993
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Power resources categories.
Publications Of The National Institute Of Standards And Technology Catalog
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Author : National Institute of Standards and Technology (U.S.)
language : en
Publisher:
Release Date : 1988
Publications Of The National Institute Of Standards And Technology Catalog written by National Institute of Standards and Technology (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.
Publications Of The National Bureau Of Standards Catalog
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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1987
Publications Of The National Bureau Of Standards Catalog written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
Commerce Publications Update
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Author :
language : en
Publisher:
Release Date : 1987
Commerce Publications Update written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Industries categories.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1988
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Power resources categories.
Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.
Government Reports Announcements Index
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Author :
language : en
Publisher:
Release Date : 1993
Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Science categories.
Absorbed Dose To Water Calibration Of Ionization Chambers In A 60co Gamma Ray Beam
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Author : nist
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2013-12-11
Absorbed Dose To Water Calibration Of Ionization Chambers In A 60co Gamma Ray Beam written by nist and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-11 with Law categories.
Absorbed-dose-to-water calibrations are important to the medical community to facilitate the accurate determination of doses delivered to tumors during external-beam cancer therapy. The first version of this document offered an absorbed-dose-to-water calibration service based on a graphite calorimeter as the primary standard. However, the use of this calorimeter necessitated calculations to convert the measurement from graphite to water. In 1989, a water calorimeter was introduced at the National Institute of Standards and Technology (NIST), which was to replace the graphite calorimeter as the primary standard. Though the calculations necessary for conversion factors were eliminated with this new technology, a calibration service based on the water calorimeter was not developed at this time. Despite the fact that the service was available, the medical physics community did not take advantage of it and used chambers calibrated in terms of exposure (in units of roentgen) to calibrate their radiotherapy 60Co and high-energy electron accelerator x-ray. A protocol, commonly known as TG21, developed by the American Association of Physicists in Medicine (AAPM), involves many calculations to arrive at the quantity desired by the medical physicist in the practicing clinic, cGy/MU (centiGray/monitor unit). The AAPM has initiated a new protocol through Task Group 51 which involves absorbed-dose-to-water calibrations of ion chambers commonly used in the calibration of the clinical radiotherapy photon and electron beams.NIST has developed and is now prepared to offer the absorbed-dose-towater calibration service for ionization chambers based on a water calorimeter standard developed by Steve Domen at NIST. This document outlines the steps that have been taken to develop this service including a brief description of the Domen water calorimeter. The procedures that are involved in the calibration of an ionization chamber for this quantity are presented along with results from recent comparisons of the NIST with the Bureau International des Poids et Mesures (BIPM) in France and the National Radiation Council Canada (NRCC).