Download or read book Ionization Chamber Intercomparison in Mixed Neutron and Gamma ray Radiation Fields by National Bureau of Standards and Armed Forces Radiobiology Research Institute written by and published by . This book was released on 1986 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1987 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Reports Awareness Circular TRAC written by and published by . This book was released on 1987-05 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1991 with total page 1644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1987 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wall Attenuation and Scatter Characteristics of Ionization Chambers at Armed Forces Radiobiology Research Institute written by M. Dooley and published by . This book was released on 1986 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ion chambers are used at AFFRI as the primary method of dosimetry. These chambers are calibrated with a cobalt-60 radiation source and are used for dose measurements in high-energy electron, mixed neutron, /gamma, and cobalt-60 radiation fields. Radiation attenuation and scattering in the ion chamber wall depends on the radiation field and affects the chamber response. A wall correction factor, KW, is used to help eliminate this source of error. The wall correction factor was experimentally determined for cobalt-60 and typical AFRRI mixed neutron/gamma fields. Keywords: calibration; Radiation dosage; Radiation simulation tests.
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1991 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the International Commission on Radiological Units and Measurements ICRU 1956 written by International Commission on Radiological Units and Measurements and published by . This book was released on 1957 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Ionization Chamber Method for Absolute Gamma Ray Dose Measurements written by Ira Thomas Myers and published by . This book was released on 1953 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Absorbed Dose to Water Calibration of Ionization Chambers in a 60co Gamma ray Beam written by nist and published by Createspace Independent Publishing Platform. This book was released on 2013-12-11 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Download or read book Neutron Generators for Analytical Purposes written by International Atomic Energy Agency and published by IAEA Radiation Technology Repo. This book was released on 2012 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication addresses recent developments in neutron generator (NG) technology. It presents information on compact instruments with high neutron yield to be used for neutron activation analysis (NAA) and prompt gamma neutron activation analysis in combination with high count rate spectrometers. Traditional NGs have been shown to be effective for applications including borehole logging, homeland security, nuclear medicine and the on-line analysis of aluminium, coal and cement. Pulsed fast thermal neutron analysis, as well as tagged and timed neutron analysis, are additional techniques which can be applied using NG. Furthermore, NG can effectively be used for elemental analysis and is also effective for analysis of hidden materials by neutron radiography. Useful guidelines for developing NG based research laboratories are also provided in this publication.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1989 with total page 1672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determination of Absorbed Dose in Reactors written by and published by . This book was released on 1971 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiological Safety Aspects of the Operation of Proton Accelerators written by Ralph H. Thomas and published by . This book was released on 1988 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report serves as a guide for the planning and implementation of radiation protection programmes for all types of positive ion accelerators. The basic types of accelerators are briefly described, followed by a detailed description of several installations covering the energy range from 10 MeV to 500 GeV. Special emphasis is given to the production of ionizing radiation and its transmission through shielding, computer techniques for shield design, radiation measurement and interpretation, and the radiological impact of accelerators on the environment. Extensive references are given so the book can serve as a source to the published literature.
Download or read book Implementation of the International Code of Practice on Dosimetry in Radiotherapy TRS 398 written by International Atomic Energy Agency and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Health and Performance Risks of Space Exploration Missions written by Jancy C. McPhee and published by U. S. National Aeronautics & Space Administration. This book was released on 2009 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
