LS-PGNAA set up for CL determination in water samples using MCNP simulation

The Monte Carlo code has been used to optimize the design of a PGNAA facility which was subsequently constructed for quantification of chlorine in water to simulate neutron transport from the 241AmBe source into a PGNAA set-up. Modeling calculations were performed to optimizing the experimental set up for Cl measurements in 5 liter of water. The optimization with MCNP4C was focused on maximizing the sensitivity of the measure which leads to improving the accuracy of salinity determination in a 5 L sample. Different materials used for the neutron collimation, length of neutrons collimators materials and dimensions as well as sample size together with different dimensions of neutrons collimators were studied.