Appraisement of the correction factors for neutron reaction in the manganese bath using Monte Carlo calculation

In this work, the Monte Carlo method has been used to simulate the manganese sulfate bath calibration system, in order to evaluate the different interaction of neutron with all nuclei of the components of the solution, i.e., hydrogen, manganese, sulfur, and oxygen nuclei for 241Am-Be and 252Cf neutron sources. Also, the leakage probability of neutron has been calculated for various radiuses of spherical bath containing a solution with weight concentration of 93.68 g/(kg of solution). The simulations performed by MCNPX, included a detailed description of the geometry and material of the system (tank, holder and source). The calculations were evaluated using neutron cross sections from several libraries. The results of calculation show that the proper radiuses of spherical manganese bath with this concentration, for 252Cf and 241Am-Be sources, are about 35 and 60-65 cm, respectively. (author)