METHOD FOR DETERMINING THE ISOTOPE RATIO OF FISSILE MATERIAL CONTAINED IN A FISSION CHAMBER

摘要

The invention relates to a method for determining the isotope ratio of fissile material having a main isotope and at least one impurity isotope, characterized in that it includes the following steps: measuring (1) the net surface areas S(E1) and S(E2), at the respective energies E1 and E2, of gamma peaks of the fissile material (B); measuring (2) the total reference absorption efficiencies RO P(E1) and RO P(E2) at energies E1 and E2; calculating (3) the full transfer efficiency T (E1) and T (E2) of the fissile material; and calculating (4) the isotope ratio of fissile material R using the equation (A): where K1 is a known quantity which depends on the main isotope and the impurity isotope and K2 is a known quantity which depends on energies E1 and E2.