Method and device for measuring effective atomic number of substance

Abstract

The invention discloses a device for measuring an effective atomic number of a substance, which comprises an X ray source which emits X rays with different energy to a measured object, a Cerenkov detector which receives the X rays passing through the measured object and generates a first electrical signal, an energy depositing detector which receives the X rays passing through the measured object and generates a second electrical signal, and a processor which is used for acquiring the effective atomic number of the measured object according to the first electrical signal and the second electrical signal. The invention also discloses a method for measuring the effective atomic number of the substance. The method for measuring the effective atomic number of the substance by combining the Cerenkov detector and the energy depositing detector ensures that X-ray photons with high energy are more easy to form large signals during the detection of the Cerenkov detector compared with the X-ray photons with low energy, so the resolution effect of the acquired effective atomic number of the substance is enhanced.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a method and device for measuring the effective atomic number of a substance. Background technique [0002] At present, gas detectors, scintillation detectors and semiconductor detectors are commonly used in the field of radiation imaging, and the magnitude of the signal generated by the above detectors is proportional to the energy of the radiation in its sensitive volume. At present, two high-energy and low-energy detectors are generally used to measure the effective atomic number of a substance. The way to realize it is to use two detectors with energy deposition properties. The detector for measuring low-energy X-rays is placed on the side close to the X-ray source and the detected On the material side, behind it is the one that measures the high-energy X-rays, ie the X-rays must first pass through the low-energy detectors and then reach the high-energy detectors. [00...

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Problems solved by technology

[0004] The problem to be solved by the embodiments of the present invention is to provide a method and device for measuring the effective atomic number of a substance, so as to overcome the discrimination effect of the obtained effective atomic number of a substance in the prior art due to the use of two detectors with properties of energy deposition poor defect

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