Accession Number : ADA179816


Title :   Wall Attenuation and Scatter Characteristics of Ionization Chambers at Armed Forces Radiobiology Research Institute


Descriptive Note : Technical rept.


Corporate Author : ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD


Personal Author(s) : Dooley, M ; Eagleson, D M ; Mohaupt, T H


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD= ADA179816


Report Date : Dec 1986


Pagination or Media Count : 24


Abstract : 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.


Descriptors :   *ATTENUATION , *DOSIMETRY , *IONIZATION CHAMBERS , CALIBRATION , CHAMBERS , CORRECTIONS , DOSAGE , ELECTRON ENERGY , ERRORS , GAMMA RAYS , HIGH ENERGY , MEASUREMENT , MILITARY RESEARCH , MIXING , NEUTRONS , RADIATION , RADIATION ATTENUATION , RADIATION DOSAGE , RADIATION SIMULATION TESTS , RADIOBIOLOGY , RESPONSE , SCATTERING , SOURCES , WALLS


Subject Categories : Nuclear Instrumentation


Distribution Statement : APPROVED FOR PUBLIC RELEASE