Inconsistencies of neutron flux parameters for k0 standardization in neutron activation analysis determined with the use of Au+Zr and Au+Mo+Cr monitor sets at the LVR-15 reactor in Řež

2012 ◽  
Vol 293 (2) ◽  
pp. 665-674 ◽  
Author(s):  
Marie Kubešová ◽  
Jan Kučera
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Neutron Flux ◽  
Neutron Flux Parameters ◽  
K0 Standardization

Interferences in instrumental neutron activation analysis by threshold reactions and uranium fission for miniature neutron source reactor

2013 ◽  
Vol 101 (9) ◽  
pp. 601-606
Author(s):  
M. Wasim
Keyword(s):  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Neutron Flux ◽  
Neutron Source ◽  
Fission Products ◽  
Correction Factors ◽  
Uranium Fission ◽  
Instrumental Neutron Activation

Summary Miniature neutron source reactors (MNSR) are known for their stable neutron flux characteristics and are mostly employed for neutron activation analysis (NAA). Interfering reactions are sometimes observed in instrumental neutron activation analysis (INAA). Failure to correct for these interferences produces significant systematic positive errors. This paper provides correction factors for the interferences caused by the threshold reactions and fission products of 235U. These factors were calculated by using the experimentally determined thermal, epithermal and fast neutron flux and epithermal neutron flux shape factor and the nuclear data from the literature using the Høgdahl convention. Correction factors were calculated for (n, p) and (n, α) reactions for the most commonly observed radionuclides in INAA. Similarly, correction factors for uranium fission were calculated for 9 elements (Ce, Ba, La, Mo, Nd, Pd, Ru, Sm and Zr). The correction factors were validated by analyzing different materials. A comparison of uranium fission factors with those published in the literature showed a good agreement except for 97Zr, 99Mo and 131Ba which is due to difference in the flux characteristics. In general, these factors can be used with confidence.

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