Positron annihilation life spectrum measuring method and system
A technique of positron annihilation, measurement method, applied in the fields of nuclear spectroscopy and nuclear detection
Active Publication Date: 2018-06-01
INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
It can be seen that at least half of the effective positron annihilation events are not collected due to the requirements of the detector energy window selection
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0055] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details being omitted, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solution...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the technical field of nuclear spectrums, and discloses a positron annihilation life spectrum measuring method. The method comprises the steps of receiving a first start signal and a second start signal obtained by a first judgment signal and a second judgment signal through amplitude judgment; running or operating the first start signal and the second start signal to generate a trigger signal; receiving a first detection signal and a second detection signal in the set time in response to the trigger signal; judging whether the amplitude of the first detection signal and the amplitude of the second detection signal are matched with the first amplitude and the second amplitude to obtain a first judgment result and a second judgment result, calculating a first time difference and a second time difference between the first detection signal and the second detection signal; obtaining a first service life graph by counting the first time difference according to the first judgment result, obtaining a second service life graph by counting the second time difference according to the second judgment result, and obtaining the positron annihilation life spectrum by superposing the first service life graph and the second service life graph. According to the method, the utilization rate of the detection signals is improved.
Description
technical field [0001] The present disclosure relates to the technical field of nuclear spectroscopy and nuclear detection, in particular, to a positron annihilation lifetime spectrum measurement method and a positron annihilation lifetime spectrum measurement system. Background technique [0002] Positron annihilation measurement technology provides a unique nondestructive characterization method for studying the internal microstructure of materials. Among them, the most commonly used and characteristic positron annihilation lifetime spectroscopy measurement technology can not only determine the The type and size of defects in the medium can be measured, and the relative concentration of different defects can be measured. refer to figure 1 The schematic diagram of the structure of the positron annihilation lifetime spectrometer shown; the positron annihilation lifetime spectrometer (hereinafter referred to as the spectrometer) usually uses two BaF 2 The detectors are resp...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/36G01N23/00
CPCG01N23/00G01T1/36
Inventor 王宝义韩振杰刘福雁况鹏张鹏曹兴忠章志明魏龙
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI