Experimental determination of k
0
, Q
0
, \bar{E}_{r} factors and neutron cross-sections for 41 isotopes of interest in Neutron Activation Analysis |
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Authors: | F Farina Arboccò P Vermaercke K Smits L Sneyers K Strijckmans |
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Institution: | 1. Department of Analytical Chemistry, Ghent University, Krijgslaan 281 S12, 9000, Ghent, Belgium 2. k0-INAA Laboratory, Studiecentrum voor Kernenergie - Centre d’étude de l’énergie nucléaire (SCK?CEN), Belgian Nuclear Research Centre, Boeretang 200, 2400, Mol, Belgium
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Abstract: | The k 0 -literature has been reviewed every decade but some of its nuclear data is still more than 30 years old. Sometimes Q 0 values were adopted from the nuclear data at that time or were experimentally determined by only 1 laboratory. Other isotopes were listed with accurate pairs of (k 0 , Q 0 ) values but were also quoted as candidates for redetermination for different reasons (i.e. imprecise cadmium transmission factors, half-lives). In this work we aim at the experimental re-determination of k 0 and Q 0 values for 41 isotopes of analytical interest while introducing a methodology for simultaneous $ \bar{E}_{r} $ and Q 0 determination employing N irradiation channels. In order to satisfy the metrological level required, up to 12 repeats per standard were irradiated in up to 4 irradiation channels of the Belgian Reactor 1 (BR1, SCK?CEN) having a wide spread in neutron characteristics. Our relative percentile differences to the literature values were usually ≤10 % for Q 0 factors, ≥25 % for $ \bar{E}_{r} $ values and ≤4 % for k 0 values. Our precision and accuracy are discussed thoroughly. |
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