10-03-2022 дата публикации
Номер: US20220074876A1
Принадлежит:
A method and a device for the detection of radioactive sources, based on the simultaneous use of two or more radiation detectors of different types and the composition of the data collected by the two or more radiation detectors. 1. A method for identifying a radioactive source comprising the steps of:detecting, from said radioactive source, gamma emitting sources with a gamma spectroscopic, type I, detector;detecting, from said radioactive source, the plurality of impulses associated with respective neutron emissions and gamma emissions with a gamma/neutron, type II, detector;identifying a first portion of said plurality of impulses associated with respective neutron emissions and a second portion of said plurality of impulses associated with respective gamma emissions, said step of identifying said first and second portion of impulses including the calculation for each impulse of a respective total integral Ltot of the impulse, and further comprising the steps of:{'sub': ['n', 'γ'], '#text': 'determining a first number nof impulses belonging to the first portion and a second number nof impulses belonging to the second portion;'}{'sub': ['n', 'γ', 'n', 'Nn', 'n', 'γ', 'Ng', 'γ'], '#text': 'calculating a first average value Eand a second average value Eof the total integral Ltot, wherein E=Σ(Ltot/n), and E=Σ(Ltot/n);'}{'sub': ['γ', 'n', 'γ', 'n'], '#text': 'calculating parx=n/nand pary=E/E;'}identifying if the radioactive source belongs to a first group of neutron sources or to a second group of gammas sources by the data parx, pary;if the radioactive source belongs to the first group of neutron sources, perform identification of the gamma sources detected with a type I detector, through spectroscopy;double confirmation of the identification if both gamma and neutron are detected;detection of masking condition of neutrons in presence of gamma, performed by merging the results of the identification of the Type I detector with the results of the identification of the ...
Подробнее