Sample element distribution measuring device and method based on prompt gamma-ray neutron activation analysis

A technology of gamma ray and activation analysis, which is applied in the direction of measuring devices, material analysis using wave/particle radiation, and material analysis, can solve the problems of element spatial distribution information not being given, detection influence, etc., and achieve important application value Effect

Inactive Publication Date: 2018-11-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0003] The traditional detection technology can only give the profile information and the overall composition information of the sample, but the

Method used

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  • Sample element distribution measuring device and method based on prompt gamma-ray neutron activation analysis
  • Sample element distribution measuring device and method based on prompt gamma-ray neutron activation analysis
  • Sample element distribution measuring device and method based on prompt gamma-ray neutron activation analysis

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Embodiment 1

[0031] Measurement of chlorine distribution within an inhomogeneous sample

[0032] In this example, a 10×10×2cm 3 The volume of sodium chloride solution sample is measured in 2×2×2cm 3 The unit is divided into 25 blocks, and the concentration of sodium chloride in different positions is different such as figure 2 shown. The sample is placed on the measurement platform, and the distance from the neutron collimation port and the lead shielding device is 10cm. Apply high voltage to the D-D neutron generator and measure from the far left. The energy spectrum was collected and analyzed by the prompt gamma ray neutron activation analysis technique. image 3 Prompt gamma ray energy spectra were recorded at two different measurement positions, and it can be clearly seen that the energy spectrum has a significant difference at the chlorine element. Carry out the same measurement and analysis for each position, and use the calibration curve method to calculate the concentration of...

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Abstract

The invention relates to a sample element distribution measuring device and a method based on prompt gamma-ray neutron activation analysis. The sample element distribution measuring device based on prompt gamma-ray neutron activation analysis comprises a neutron source system, a sample control system, and a data detection processing system; the neutron source system is used for generating neutrons, and slowing-down is carried out so as to obtain thermal neutrons, collimation is carried out so as to obtain neutron beams, a sample to be detected is subjected to bombardment, and radiation capturereaction with nuclide in the sample is carried out so as to generate characteristic gamma-ray; the characteristic gamma-ray is detected and processed by the data detection processing system, gamma-ray energy and intensity are analyzed so as to obtain the nuclide information of a corresponding measured point; a measuring platform is adopted for rotation and moving of the object to be detected based on preset measuring step length, measuring of different positions is carried out, the corresponding relationship of the sample positions with the nuclide content is obtained, and sample element space distribution information is obtained.

Description

technical field [0001] The invention belongs to the technical field of sample element content detection, and in particular relates to a device and method for measuring sample information by using prompt gamma ray neutron activation analysis. Background technique [0002] The detection and analysis of bulk samples such as cultural relics, space samples, alloy samples and other objects have always been the focus of attention. At present, nuclear technology has become a routine technology in the field of measurement analysis. It has many advantages that other analytical techniques do not have. The prompt gamma ray neutron activation analysis technique uses neutrons to capture and inelastically scatter reactions with nuclides in the sample, within a very short time (less than 10 -13 s) emit characteristic gamma rays, and detect the energy and intensity of the gamma rays so as to perform qualitative and quantitative analysis of the nuclides in the sample. Due to its non-destruc...

Claims

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Application Information

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IPC IPC(8): G01N23/222
CPCG01N23/222
Inventor 黑大千贾文宝程璨李佳桐蔡平坤孙爱赟汤亚军赵冬
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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