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Neutron Irradiation in Activation Analysis: A New Rabbit for the NBSR

Published

Author(s)

Richard M. Lindstrom, Rolf L. Zeisler, Elizabeth A. Mackey, P J. Liposky, Rachel S. Popelka-Filcoff, Robert E. Williams

Abstract

Elementary activation analysis assumes that the reaction rate is proportional to the number of atoms of analyte present in the sample. On close examination, this is not always true, even within a set of samples irradiated together. For accurate analysis, it is necessary to consider neutron flux gradients in three dimensions, neutron self-shielding, and sometimes changes in neutron spectrum by the sample. Gamma radiation from the reactor core and from neutron activation raises the temperature, induces recoil reactions, and otherwise degrades the sample and its container. These issues are all important in the design and experimental characterization of irradiation facilities, as exemplified in the installation of a new rabbit facility in the NIST reactor.
Citation
Journal of Radioanalytical and Nuclear Chemistry

Keywords

epithermal neutrons, fluence measurement, neutron actiation analysis, neutron irradiation, reactor characterization, thermal neutrons

Citation

Lindstrom, R. , Zeisler, R. , Mackey, E. , Liposky, P. , Popelka-Filcoff, R. and Williams, R. (2008), Neutron Irradiation in Activation Analysis: A New Rabbit for the NBSR, Journal of Radioanalytical and Nuclear Chemistry (Accessed April 25, 2024)
Created October 16, 2008