Method and system using the Compton effect to localise a plane separating two media of different densities

摘要

-Method and system making it possible to carry out high-precision measurements to localise a plane (7) separating two media (6) of different densities, making use of the Compton effect, as well as their application to measuring the thickness of layers. …??-A measurement assembly (14), consisting of a transceiver of X-rays or gamma -rays which are focused on transmission and reception, irradiates an elementary volume (12) of the said media (6) and is displaced perpendicularly to the plane (7) separating these media (6), and a fifth signal is calculated representing the excess, compared to a threshold, of the derivative, with respect to the displacement, of the detected signal, and then the centre of mass is calculated of the displacements corresponding to the last sequence of these fifth signals of the same sign, weighting these displacements by the corresponding said fifth signal. …IMAGE…