Method for realizing energy scale of gas proportional detector based on thick radioactive source
An energy calibration and detector technology, which is applied in the directions of radiation measurement, radiation intensity measurement, X-ray energy spectrum distribution measurement, etc., can solve the problem that the energy calibration of the gas proportional detector cannot be carried out normally, so as to improve the accuracy of energy measurement, Prolong service life and reduce the effect of radiation damage
Pending Publication Date: 2022-05-20
NORTHWEST INST OF NUCLEAR TECH
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] The invention provides a method for realizing the energy calibration of the gas proportional detector based on the thick radioactive source, which mainly solves the problem that the self-absorption is more obvious when the radioactive source is thicker in the measurement system, which leads to the problem that the energy calibration of the gas proportional detector cannot be carried out normally.
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
[0044] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Those skilled in the art will appreciate that these embodiments are used only to explain the technical principles of the present invention, and are not intended to limit the scope of protection of the present invention.
[0045]Detectors generally require an energy scale from a radioactive source of known energy to be physically used, and since the gas proportional detector in the measurement system cannot deposit the full energy of the calibration ray (i.e. α ray), the energy scale needs to be carried out in accordance with the measurement method. The conforming event measured by the measurement system is formed by the calibration ray passing through the gas proportional detector and finally shooting into the semiconductor detector, and the calibrated ray energy is deposited in the gas proportional detector and the semiconductor detector at the same ti...
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 provides a method for realizing energy calibration of a gas proportional detector based on a thick radioactive source, and mainly solves the problem that the energy calibration of the gas proportional detector cannot be normally carried out due to obvious self-absorption when the radioactive source in a coincidence measurement system is thick. According to the method, by limiting the irradiation area of the radioactive source on the semiconductor detector, only rays with large deposition energy in the gas proportional detector can reach the semiconductor detector to generate coincidence events. Meanwhile, in all coincidence events, only a part of events with relatively high energy of the semiconductor detector, namely an event with minimum self-absorption, are selected, so that the influence of self-absorption on energy scales is avoided, and the purpose of improving the energy measurement accuracy is achieved.
Description
Technical field [0001] The present invention relates to nuclear testing and nuclear instrumentation, specifically to a method of realizing a gas proportional detector energy scale based on a thick radioactive source, the method is a method of using a thick source to carry out a method that meets the energy scale of the gas proportional detector in the measurement system. Background [0002] Nuclear detectors typically undergo an energy scale to convert the output voltage or charge signal into the correct energy data. The energy scale is generally scaled using single-energy rays that deposit all the energy in the nuclear detector. as Figure 1 as shown, 3 The core of the He sandwich spectrometer consists of two opposed semiconductor detectors 2 and a charge between two semiconductor detectors 2 3 He's gas proportional detector 1 composition. Install a small one on the outside of the gas proportional detector cathode box 241 Am radioactive source, using the 5.486 MeVα rays emitted b...
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): G01T1/24G01T1/36
CPCG01T1/24G01T1/366Y02E30/30
Inventor 张文首阿景烨包利红邬泽鹏江新标
Owner NORTHWEST INST OF NUCLEAR TECH