On the fission interference correction and its dependence on the epithermal to thermal neutron flux ratio in thermal NAA of molybdenum.
The present work aims at the following: (1) analyzing the experimental fission interference factor for molybdenum, FMo, obtained by the authors, who have described the irradiation conditions used as concerns the epithermal to thermal neutron flux ratio, phi epi/phi 0; (2) establishing a simple calculation model that describes the dependence of FMo on phi epi/phi 0 in an adequate way, to provide a satisfactory basis to explain the scatter found in the existing experimental data; and (3) clearly indicating the basic recommendations to take into account in order to obtain with high accuracy the concentration of molybdenum in samples containing uranium.
Martinho
E
E
Instituto Tecnológico e Nuclear, Sacavém, Portugal.
Freitas
M C
MC
D008982:Molybdenum / Q000032:analysis*; D009501:Neutron Activation Analysis / Q000379:methods*
D008982:Molybdenum