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Characterization of low power research reactor neutrons for the validation of k0-INAA standardization based on k0-IAEA software

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by Baidoo, I.K. (Nuclear Reactors Research Centre, National Nuclear Research Institute, Ghana Atomic Energy Commission, Box LG 80, Legon-Accra (Ghana); Department of Nuclear Sciences and Applications, School of Nuclear and Allied Sciences, University of Ghana, P.O. Box AE1, Atomic, Accra (Ghana)); Nyarko, B.J.B. (Nuclear Reactors Research Centre, National Nuclear Research Institute, Ghana Atomic Energy Commission, Box LG 80, Legon-Accra (Ghana); Department of Nuclear Sciences and Applications, School of Nuclear and Allied Sciences, University of Ghana, P.O. Box AE1, Atomic, Accra (Ghana)); Akaho, E.H.K. (Department of Nuclear Engineering, School of Nuclear and Allied Sciences, University of Ghana, P.O. Box AE1, Atomic, Accra (Ghana)); Dampare, S.B. (Department of Nuclear Sciences and Applications, School of Nuclear and Allied Sciences, University of Ghana, P.O. Box AE1, Atomic, Accra (Ghana)); Sogbadji, R.B.M. (Nuclear Reactors Research Centre, National Nuclear Research Institute, Ghana Atomic Energy Commission, Box LG 80, Legon-Accra (Ghana)); Poku, L.O. (Department of Nuclear Sciences and Applications, School of Nuclear and Allied Sciences, University of Ghana, P.O. Box AE1, Atomic, Accra (Ghana)), E-mail: baidooisaac51@yahoo.co.uk 

Channel Bsite2 of Ghana research reactor-1 has been characterized for k0-INAA application. Cadmium ratio and baremulti-monitor were used to determine flux parameters using 0.1%Au–Al, Fe, and Zr wire as flux monitors. The parameters determined were 18.36±1.91, 0.0479±0.012, 5.12×1011±0.42×1011 ncm−2 s−1, 2.74×1010±0.14×1010 ncm−2 s−1, 7.73×1010±0.16×1010 ncm−2 s−1 and 16.75±1.58, −0.034±0.0028, 4.28×1011±1.71×1011 ncm−2 s−1, 2.55×1010±0.15×1010ncm−2 s−1 respectively for thermal-to-epithermal flux ratio, alpha, thermal neutron, epithermal neutron and fast neutron flux using cadmium ratio and multi-monitor method accordingly. The k0-INAA performance assessment based on z-score distributions showed most results within |z|<2. – Highlights: • We characterized the irradiation site of Ghana Research Reactor-1 (GHARR-1) for k0-INAA application. • Both bare and Cd-ratio method were used for the characterization. • α, f and thermal, epithermal and fast neutron flux values were found to agree largely with earlier reports. • We developed an irradiation method to detect and quantify up to 32 elements in plants, rock and lake sediment matrices. • The z-score analysis showed 90% o

Source/Report: Applied Radiation and Isotopes; v. 79; ISSN 0969-8043; Worldcat; CODEN ARISEF; Sep 2013; p. 85-93; S0969-8043(13)00244-3; Available from http://dx.doi.org/10.1016/j.apradiso.2013.05.005; Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)

Publ. Year: 2013

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