Patent ID: 11914087
Assignee: SOLETANCHE FREYSSINET
Field: Environmental technology (Chemistry)
Classification: CPC G | IPC G

Claim 4:
5. The method according to claim 1, wherein the decomposition of the responses {Si} in step (b) comprising:
via factor analysis, determining, for each monoenergetic or pseudo-monoenergetic radionuclide i of the plurality of radionuclides, at least one correlation coefficient λi between the response Si of the scintillator to the radionuclide i and the factors, λi, depending on the energy Ei at which gamma rays are emitted by the radionuclide i,
computing, by interpolation of the coefficients {λi}, at least one correlation coefficient λij for each value of energy Eij at which gamma rays are emitted by a radionuclide i, where j=1, . . . , P with P being the number of possible values of energies for radionuclide i,
determining, for each radionuclide i and energy j at least one model component Xij representing the response of the scintillator for each value of energy Eij at which gamma rays are emitted by a radionuclide i, Xij being preferentially determined by regression analysis of the responses of the scintillator to monoenergetic or pseudo-monoenergetic radionuclides and/or other primary responses with similar energy, determining, for each radionuclide i, from coefficients λij, the decomposition of the signal Si into primary responses Sij=ƒ(λij, Yij, Xij).