Measurements of D2O-concentration in D2O-H2O mixture using neutron radiography technique

This study is based on the optical density results measured from neutron radiographs of different samples of light water (H 2 O) and heavy water (D 2 O), taken separately, and also in the D 2 O-H 2 O mixture. A calibration curve was drawn through the results, extracted from a series of standard mixtures of D 2 O-H 2 O, with the known D 2 O concentration The scale along the abscissa is to be explained as percentage of deuterium atoms present in the liquid compared with all atoms of hydrogen isotopes present. It may be concluded that, as D 2 O concentration added to light water increases, the optical density also increases, i.e., optical density is a function of D 2 O concentration. Neutron radiographs were then taken from two other samples of D 2 O-H 2 O mixture with different and unknown D 2 O concentration. Concentration of D 2 O was determined using the calibration curve via measurement of average optical density values.