Patent ID: 7702067
Filing Date: 2010-04-20
Classification: G01N

Abstract:
1. A method for characterizing a sample with respect to the presence of a specified element, the sample having a surface and characterized by a bulk, the method comprising: a. illuminating the surface of the sample with x-ray excitation radiation; b. measuring a first intensity of a first characteristic emission line of the specified element at a first energy; c. measuring a second intensity of a second characteristic emission line of the specified element at a second energy; d. comparing the first intensity to the second intensity to establish whether the specified element is disposed above the bulk of the sample; e. in the case where the specified element is disposed above the bulk of the sample, determining an areal density of the specified element; and f. in the case where the specified element is within the bulk of the sample, determining a volumetric concentration of the specified element within the sample; and g. outputting at least one of the areal density and volumetric concentration of the specified element.