Quantification of gamma-ray Compton-scatter nondestructive testing

Abstract

Your lSk, vcno r c i f Q r mOur lYe Notre reYrenu?The Carlo simulations. An inversion process of the measurement model was developed to determine the density of a discontinuity in an object by inverting the detector response within the energy range of interest, after compensating for photon attenuation in the surroundings.The quantification process was applied to independently-obtained experimental indications, with considerable success. A normalization process relating the experimental measurements to the measurement mode1 was developed, and the inversion algorithm was slightly modified to accommodate the background subtraction process involved in obtaining the expenmental indications.

Monte Carlo study of a 3D Compton imaging device with GEANT4

“…In the last fifty years Compton scattering has found a broad range of applications in medicine, as imaging tool [2]- [6] or to measure the human tissue density [8]. Compton scattering is also widely used in the field of non destructive testing (NDT) for quality control to detect defects like cracks, inclusions and voids inside industrial manufactures [9]- [12]. The possibility of using backscattered radiation has made Compton scattering very attractive also in those situations where the access to the object to be examinated is restricted to one side, like inspection of airframes [13] and soil density determination [14].…”