Patent ID: 8275567
Filing Date: 2012-09-25
Classification: G01T,G01V

Abstract:
1. A method of determining an amount of radioactive material within a body of material, the method comprising: determining a preliminary measure of an amount of radioactive material within a body of material by directly and/or indirectly measuring emissions generated by the radioactive material; detecting muons and/or electrons generated by muons which have not passed through the body of material to give a first value; detecting muons and/or electrons generated by muons which have passed through the body of material to give a second value; processing the first value and second value to determine a factor, the factor being an expression of density and being a function of the second value divided by a product of a calibration factor and the first value; and applying the factor to the preliminary measure of the amount of radioactive material within the body of material to obtain a corrected measure of the amount of radioactive material within the body of material.