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