| 摘要 |
PURPOSE:To enhance the exactitude in the detection of a peak by comparing the value calculated by subtracting the value proportional to the square root of measuring output from said measuring output with the value calculated by subtracting the value proportional to the intensity of a background from said intensity of the background. CONSTITUTION:In the measurement of X-rays, when there is no statistical fluctuation in measuring output and the measured value of a background and the difference be tween them is positive number, it can be judged that there is a peak and the value of said difference shows peak intensity. However, in actual measurement, statistical fluctuation is present and the value calculated by subtracting the value proportional to the square root of the measuring output from said measuring output corresponds to the lower limit of irregularity of Poisson distribution. Therefore, when the difference between the value calculated by subtracting the value proportional to the square root of the measuring output from the measuring output and the value calculated by subtracting the value proportional to the square root of the background intensity measuring output from said background intensity measuring output is zero or less, a peak is within a statistical fluctuation range of measured value and the presence of the peak is not affirmed. When this difference is larger than a predetermined posi tive number, the presence of the peak can be affirmed. |
