17-12-2020 дата публикации
Номер: US20200393391A1
Принадлежит:
The invention relates to a method for calibrating a radiometric apparatus for determining and/or monitoring density of a medium () located in a container (). The method includes method steps as follows: 1613434367614. Method for calibrating a radiometric apparatus for determining and/or monitoring density of a medium () located in a container () , wherein a transmitting unit () and a receiving unit () are provided , wherein the transmitting unit () transmits radioactive radiation of a predetermined intensity and wherein the receiving unit () receives radioactive radiation transmitted by the transmitting unit () after passage through the medium () , and wherein a control/evaluation unit () is provided , which determines density of the medium () located in the container () based on intensity measured by the receiving unit () , wherein the method comprises method steps as follows:{'sub': C', '0', '0', '0', 'C', '0', '0, 'b': 1', '1', '1', '1, 'sup': −μ', {'sub2': 'C'}, '·ρ1D, 'determining the mass attenuation coefficient μof the empty container () with application of the half value thickness N/N=0.5 of the radioactive radiation upon passage through the empty container () according to the formula: N/N˜I/I=e, with μ: mass attenuation coefficient, ρ: density of the material of the wall of the container, D: distance traveled by the radiation, or inner diameter of the container (), I: intensity of the measured radiation, Iintensity of the transmitted radiation, N measured counting rate, Ncounting rate of the transmitted radiation,'}{'sub': 'M', 'b': 1', '2', '1, 'determining the mass attenuation coefficient (μ) based on the measured intensity, or the counting rate, of the radioactive radiation after passage through the container (), when a calibration medium of known density (ρ) is located in the container (),'}{'b': '1', 'ascertaining the dependence of the linear absorption coefficient (p) on the geometric dimensions of the container () based on the two mass attenuation ...
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