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Title: Optimised k0-instrumental neutron activation method using Triga Mark I IPR-R1 reactor at CDTN/CNEN, Belo Horizonte, Brazil
Title of periodic: Nuclear Instruments and Methods in Physics Research A Amsterdam
metadata.dc.title.subtitlejournal: Accellerators, Spectrometers, Detectors and Associated Equipment
Authors: Menezes, Maria Ângela de Barros Correia
Jacimovic, R.
Affiliation: Centro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil
Jozef Stefan Institute, Ljubljana, Slovenia
Issue Date: 2006
Keywords: Neutron activation analysis;reference materials;radiation detectors;calibration
Abstract: The Nuclear Technology Development Centre/Brazilian Commission for Nuclear Energy, CDTN/CNEN, is the only Brazilian Institution to apply the k0-standardisation method of instrumental neutron activation technique determining elements using its own nuclear reactor, TRIGA MARK I IPR-R1. After changes in the reactor core configuration, the reactor neutron flux distribution in typical irradiation channels had to be updated, as well as the parameters f and a, needed to apply the k0-method of neutron activation analysis. The neutron flux distribution in the rotary rack was evaluated through the specific count rate of 198Au and the parameters f and a, were determined in five selected channels applying the ''Cd-ratio for multi-monitor'' method, using a set of Al-(0.1 percent) Au and Zr (99.8 percent) monitors. Several reference materials were analysed, indicating the effectiveness of the improved method
Access: L
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