| 摘要 |
The present invention relates to a method and device for measuring by compensation alpha and/or beta radioactivity in a gamma background noise comprising a compensation probe comprising a first sensor allowing the alpha and/or beta and gamma radioactivity (a, b, g) to be measured and a second sensor not allowing the alpha and/or beta radioactivity to be measured but allowing the gamma radioactivity (g) to be measured; characterized in that the sensors are arranged so as to be exposed substantially to the same gamma background noise; measurement bias being associated with the geometric arrangement of the sensors because of the anisotropy of the gamma radiation; and the measurement system determines the alpha and/or beta radioactivity (a, b) by compensation, said compensation comprising a subtraction between the measurement of alpha and/or beta and gamma radioactivity (a, b, g) and the gamma measurement (g), said compensation minimising the measurement biases associated with the geometric arrangement of the sensors. Other improvements are described for improving the reliability of radioactivity measurements. |
