Radioactive source detection and measurement device

Abstract

The utility model relates to a radioactive source detecting and measuring device which comprises detector supporting frames, a sliding rail, a graduated scale, a shielding assembly and a radioactive source fixing piece, the two detector supporting frames are oppositely arranged, a gamma detector and a beta detector are arranged on the two detector supporting frames respectively, and the emission direction of the gamma detector is right opposite to the emission direction of the beta detector; the detector supporting frames are slidably arranged on the sliding rails and slide oppositely or relatively, the graduated scale is arranged on the front side of the detector support, the two detector supporting frames are each provided with a measuring piece, the measuring pieces abut against the graduated scale, and the spacing distance between the gamma detector and the beta detector is measured. The shielding group assembly and the radioactive source fixing piece are arranged between the two detector supporting frames, shield ray emission of the gamma detector and the beta detector and are suitable for containing a radioactive source, two or more different detectors are used for recording two or more atomic nucleuses which occur at the same time and are associated with each other, and the radiation source fixing piece is suitable for containing the radioactive source. The device is used for measuring and reacting energy and angular distribution of released particles.

Description

Technical Field

[0001] This application relates to the technical field of experimental instruments, and particularly to a radioactive source detection and measurement device. Background Art

[0002] In the field of nuclear physics research, the coincidence measurement technique has a wide range of applications in various fields of nuclear physics experiments. In the study of nuclear reactions, it can be used to determine the energy and angular distribution of reactants; in nuclear decay measurements, it can be used to study nuclear decay mechanisms, angular correlations between cascade radiations, half-lives of short-lived radioactive nuclides, etc.; in the field of cosmic ray research, it can be used to measure the observation of cosmic ray shower phenomena. Due to the development of fast electronics, multi-channel analyzers, and multi-parameter analysis systems, as well as the application of electronic computers in nuclear experiments, the coincidence method has become an essential experimental means for realizing multi-parameter measurements. Through this experiment, the basic method of coincidence measurement can be learned and the absolute activity of a radioactive source can be determined using the coincidence method. Using two or more different detectors to record two or more simultaneously occurring and mutually related nuclear events is called coincidence measurement. The coincidence measurement technique is a commonly used measurement technique in nuclear physics experiments, and it can be used to measure the energy and angular distribution of particles emitted in reactions. Radioactive activity refers to the number of atoms decayed per second by a radioactive element or isotope, and it is an important radiation quantity used to describe the characteristics of radioactive nuclides. Therefore, there is an urgent need for a convenient-to-use detection bracket. Utility Model Content

[0003] In view of this, this application proposes a radioactive source detection and measurement device for measuring a radioactive source.

[0004] According to one aspect of this application, a radioactive source detection and measurement device is provided, including: a detector support frame, there are two detector support frames, the two detector support frames are arranged oppositely, and a γ detector and a β detector are respectively arranged on the two detector support frames, and the emission direction of the γ detector is directly opposite to the emission direction of the β detector;

[0005] A slide rail, the two detector support frames are slidably arranged on the slide rail, and the two detector support frames can slide towards each other or away from each other;

[0006] A scale, the scale is arranged on the front side of the detector support, and measuring parts are arranged on both detector support frames, and the measuring parts are in contact with the scale to measure the interval distance between the γ detector and the β detector;

[0007] A shielding assembly, the shielding assembly is arranged between the two detector support frames to shield the ray emissions of the γ detector and the β detector;

[0008] Radioactive source fixing member, which is arranged between two detector support frames and is suitable for placing a radioactive source.

[0009] In a possible implementation manner, the detector support frame includes: a support fixing plate, a support fixing column, and a support mounting member;

[0010] The support fixing plate is a plate-like structure, arranged along the length direction of the slide rail, and the support fixing plate is horizontally arranged on the slider of the slide rail and can slide relative to the length direction of the slide rail;

[0011] The support fixing column is a columnar structure, vertically arranged on the top plate surface of the support fixing plate;

[0012] The support mounting member is an openable and closable ring structure, and the outer side of the support mounting member is fixedly connected to the top of the support fixing column.

[0013] In a possible implementation manner, there are two or more support fixing columns, and the two or more support fixing columns are arranged at intervals along the length direction of the support fixing plate.

[0014] In a possible implementation manner, the support fixing member includes: a first fixing member and a second fixing member;

[0015] The first fixing member has a fan-shaped structure, with fixing ears on both sides, and the structure of the second fixing member is the same as that of the first fixing member;

[0016] The fixing ears on both sides of the first fixing frame are bolted to the fixing ears on both sides of the second fixing member.

[0017] In a possible implementation manner, one end of the measuring ruler in the length direction is fixedly connected to the support fixing plate, and the other end abuts against the scale of the scale ruler, and the measuring ruler moves relative to the scale ruler as the detector support member slides.

[0018] In a possible implementation manner, the shielding assembly includes: a shielding plate and a shielding mounting member;

[0019] The shielding mounting member has a "U" - shaped structure, with mounting grooves respectively opened at both ends along the inner side. The shielding plate matches the mounting grooves, and the shielding plate is embedded inside the mounting grooves, separating the γ detector and the β detector.

[0020] In a possible implementation manner, the opening directions of the two mounting grooves are opposite, and the mounting grooves are open structures along the opening direction of the shielding mounting member;

[0021] The cross - section of the mounting groove is square;

[0022] The baffle is a square structure with a preset thickness.

[0023] In a possible implementation manner, the radiation source fixing member includes: a mounting portion and a fixing portion;

[0024] The fixing portion is a columnar structure, vertically located in the middle of the two detector support frames and on one side of the slide rail. The mounting portion is a strip-shaped structure, with a through radiation source mounting groove opened in the middle, and the mounting portion is rotatably arranged on the top of the fixing portion and rotates around the circumferential direction of the fixing portion.

[0025] In a possible implementation manner, it further includes: a rotating portion;

[0026] A first fixing hole is opened at one end of the length direction of the mounting portion, and the fixing hole is located below the radiation source mounting groove. A rotating hole is opened at the top of the fixing portion, and a second fixing hole is opened at the bottom. The fixing portion is suitable for being fixedly installed on the operation table. The rotating portion is a columnar structure, one end is embedded and fixedly connected inside the first fixing hole, and the other end is embedded and rotatably connected inside the rotating hole;

[0027] The cross-section of the rotating portion along the direction perpendicular to the circumferential direction is a "convex" shape structure, and the rotating portion includes a fixed end with a smaller cross-section in the length direction and a rotating end with a larger cross-section. The cross-section of the fixed end is square, and the cross-section of the rotating end is circular.

[0028] In a possible implementation manner, it further includes: a movable member and an operation table;

[0029] The scale, the detector support frame, the movable member and the slide rail are arranged on the panel of the operation table;

[0030] The movable member is a plate-shaped structure with a cross-section in a "U" shape, and the movable member covers the upper part of the slide rail, is detachably connected to the operation table, and the movable member is located in the middle position of the slide rail. The shielding assembly and the radiation source fixing member are arranged on the top of the movable member.

[0031] Advantages of the radiation source detection and measurement device according to the embodiments of the present application: A long-strip-shaped slide rail is provided on the panel of the operation console, and two detector support frames that can slide relative to the slide rail are provided on the slide rail. The γ detector and the β detector are respectively arranged on the two detector support frames and can slide relative to the slide rail. The scale is fixedly arranged on the panel of the console and is located on the front side of the slide rail. The measuring ruler is arranged on the detector support frame and abuts against the scale of the scale. Using two or more different detectors to record two or more simultaneous and correlated nuclear events is called coincidence measurement. Coincidence measurement technology is a commonly used measurement technology in nuclear physics experiments, and it can be used to measure the energy and angular distribution of particles emitted in a reaction. Radioactivity refers to the number of atoms decayed per second by a radioactive element or isotope, and it is an important radiation quantity used to describe the characteristics of a radionuclide, which reflects the nuclear decay rate of the radionuclide. This experimental device uses the dual-probe β-γ coincidence measurement method to measure the activity of the 60Co source in the laboratory. Moreover, an obstacle is usually required to be arranged between the β detector and the γ detector, mainly to prevent the gamma rays emitted from the radiation source from directly entering the inside of the β detector. This obstacle can be lead or other radiation shielding materials with an appropriate thickness, which can effectively absorb or scatter most of the gamma rays, thereby reducing its influence on the β detector. A rotatable radiation source fixing member is arranged between the two detectors. When installing the radiation source, the two detectors can be slid towards each other through the slide rail, and there is a distance that allows the radiation source fixing member to rotate. Then, the radiation source is rotated relative to the slide rail to the outside of the two detectors. At this time, the radiation source is arranged on the radiation source installation groove of the radiation source fixing frame and rotated to between the two detectors, so that the radiation source can be conveniently and efficiently arranged between the two detectors for use.

[0032] According to the following detailed description of the exemplary embodiments with reference to the accompanying drawings, other features and aspects of the present application will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are included in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the present application together with the specification, and are used to explain the principles of the present application.

[0034] Figure 1 Schematic diagram showing the radiation source detection and measurement device according to the embodiment of the present application;

[0035] Figure 2 Exploded view showing the radiation source detection and measurement device according to the embodiment of the present application;

[0036] Figure 3 Schematic diagram showing the shielding assembly of the radiation source detection and measurement device according to the embodiment of the present application;

[0037] Figure 4 Schematic diagram of a radioactive source fixing member of a radioactive source detection and measurement device according to an embodiment of the present application. Detailed implementation manners

[0038] Hereinafter, various exemplary embodiments, features and aspects of the present application will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0039] Among them, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0041] The special term "exemplary" here means "serving as an example, an embodiment or an illustration". Any embodiment described as "exemplary" here does not have to be construed as superior to or better than other embodiments.

[0042] In addition, in order to better illustrate the present application, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some instances, methods, means, elements and circuits well-known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0043] Refer to Figures 1 - 4, the radiation source detection and measurement device of the embodiment of the present application includes: detector support frames 200, slide rails 400, scales 500, shielding components 600, and radiation source fixing members 800. There are two detector support frames 200, which are arranged opposite to each other. Gamma detectors 300 and beta detectors 300 are respectively arranged on the two detector support frames 200. The emission direction of the gamma detector 300 is directly opposite to the emission direction of the beta detector 300. The detector support frames 200 are slidably arranged on the slide rails 400, and the two detector support frames 200 can slide towards or away from each other. The scale 500 is arranged on the front side of the detector 300 support frame, and measuring members 900 are arranged on both detector support frames 200. The measuring members 900 are in contact with the scale 500 to measure the distance between the gamma detector 300 and the beta detector 300. The shielding group component is arranged between the two detector support frames 200 to shield the ray emission of the gamma detector 300 and the beta detector 300. The radiation source fixing member 800 is arranged between the two detector support frames 200 and is suitable for placing a radiation source.

[0044] In this embodiment, a strip-shaped slide rail 400 is provided on the panel surface of the operation table 100, and two detector support frames 200 that can slide relative to the slide rail 400 are provided on the slide rail 400. The γ detector 300 and the β detector 300 are respectively arranged on the two detector support frames 200 and can slide relative to the slide rail 400. The scale 500 is fixedly arranged on the panel surface of the console, located on the front side of the slide rail 400. The measuring ruler is arranged on the detector support frame 200 and abuts against the scale of the scale 500. Using two or more different detectors 300 to record two or more simultaneously occurring and interrelated nuclear events is called coincidence measurement. Coincidence measurement technology is a commonly used measurement technology in nuclear physics experiments. It can be used to measure the energy and angular distribution of the particles emitted in the reaction. The radioactive activity refers to the number of atoms decayed per second by a radioactive element or isotope and is an important radiation quantity used to describe the characteristics of a radionuclide. It reflects the nuclear decay rate of the radionuclide. This experimental device uses the dual-probe β-γ coincidence measurement method to measure the activity of the 60Co source in the laboratory. Moreover, a shielding object is usually required to be arranged between the β detector 300 and the γ detector 300, mainly to prevent the gamma rays emitted from the radiation source from directly entering the interior of the β detector 300. This shielding object can be lead or other radiation shielding materials with an appropriate thickness, which can effectively absorb or scatter most of the gamma rays, thereby reducing its influence on the β detector 300. A rotatable radiation source fixing member 800 is arranged between the two detectors 300. When installing the radiation source, the two detectors 300 can be slid towards each other through the slide rail 400, and there is a distance that allows the radiation source fixing member 800 to rotate. Then, the radiation source is rotated relative to the slide rail 400 to the outside of the two detectors 300. At this time, the radiation source is arranged on the radiation source installation groove 811 of the radiation source fixing frame and rotated to between the two detectors 300, so that the radiation source can be conveniently and efficiently arranged between the two detectors 300 for use.

[0045] In a specific embodiment, the detector support frame 200 includes: a support fixing plate 230, a support fixing column 220, and a support mounting member 210. The support fixing plate 230 is a plate-like structure, arranged along the length direction of the slide rail 400, and is horizontally arranged on the slider of the slide rail 400, capable of sliding relative to the length direction of the slide rail 400. The support fixing column 220 is a columnar structure, vertically arranged on the top plate surface of the support fixing plate 230. The support mounting member 210 is an openable and closable ring structure, and the outer side of the support mounting member 210 is fixedly connected to the top of the support fixing column 220. Thus, the support fixing plate 230 is used to be arranged on the slider of the slide rail 400 to provide the installation positions for the support fixing column 220 and the support mounting member 210. The support fixing column 220 is used to arrange the support mounting member 210 above the support fixing plate 230. The support mounting member 210 is used to install and fix the detector 300.

[0046] In this embodiment, there are two or more support fixing columns 220. The two or more support fixing columns 220 are arranged at intervals along the length direction of the support fixing plate 230. At least two support fixing columns 220 are respectively arranged on both sides in the length direction, and a support mounting member 210 is arranged on the top of each support fixing column 220 to provide stable installation and support for the detector 300.

[0047] In this embodiment, the support fixing member includes: a first fixing member and a second fixing member. The first fixing member is in a fan-shaped structure, with fixing ears on both sides. The structure of the second fixing member is the same as that of the first fixing member. The fixing ears on both sides of the first fixing frame are bolt-connected to the fixing ears on both sides of the second fixing member. Before installing the detector 300, remove the bolts at the positions of the fixing ears on the first fixing member and the second fixing member, then arrange the columnar detector 300 between the first fixing member and the second fixing member, and use bolts to bolt-fix the fixing ears on the first fixing member and the second fixing member.

[0048] Among them, it should be noted that the support fixing member installed by the first fixing member and the second fixing member matches the columnar detector 300.

[0049] In a specific embodiment, one end of the measuring ruler in the length direction is fixedly connected to the support fixing plate 230, and the other end abuts against the scale of the scale ruler 500. The measuring ruler moves relative to the scale ruler 500 as the detector 300 support slides. Thus, the relative spacing distance between the two detector support frames 200 and the sliding distance of the detector 300 can be obtained.

[0050] In a specific embodiment, the shielding assembly 600 includes: a shielding plate 610 and a shielding mounting member 620. The shielding mounting member 620 is in a "U"-shaped structure, and mounting grooves are respectively provided along the two ends of the inner side. The shielding plate 610 matches the mounting groove. The shielding plate 610 is embedded in the interior of the mounting groove to separate the γ detector 300 and the β detector 300.

[0051] In this embodiment, the two installation grooves are opened in opposite directions, and the installation grooves are open structures along the opening direction of the shielding installation member 620. The cross-section of the installation grooves is square, and the shielding plate 610 is a square structure with a preset thickness.

[0052] Specifically, since a shielding object is usually required between the β detector 300 and the γ detector 300, mainly to prevent the gamma rays emitted from the radiation source from directly entering the inside of the β detector 300, the shielding object can be lead or other radiation shielding materials of appropriate thickness, which can effectively absorb or scatter most of the gamma rays, thereby reducing their impact on the β detector 300. Specifically, the present application provides a shielding plate 610 and a shielding mounting member 620 at the middle position of the two detector support frames 200100. The shielding plate 610 is a "U"-shaped structure with a mounting groove, so that the shielding plate 610 can be conveniently installed on the mounting groove of the shielding support frame, so that it is located between the β detector 300 and the γ detector 300, thereby preventing the gamma rays emitted from the radiation source from directly entering the inside of the β detector 300. The shielding mounting member 620 is a "U"-shaped structure, and will not affect the test of measuring the activity of the radioactive source by the β-γ coincidence method after the shielding is removed. Therefore, the cooperation between the shielding plate 610 and the shielding mounting member 620 can quickly install and remove the shielding plate 610 on the shielding mounting member 620.

[0053] In a specific embodiment, the radiation source fixing member 800 includes: a mounting portion 810 and a fixing portion 820, wherein the fixing portion 820 is a columnar structure, vertically disposed in the middle of the two detector support frames 200 and located on one side of the slide rail 400, and the mounting portion 810 is an elongated structure with a radiation source mounting groove 811 extending through the middle, and the mounting portion 810 is rotatably disposed on the top of the fixing portion 820 and rotates around the circumferential direction of the fixing portion 820.

[0054] In this embodiment, it further includes: a rotating part 840. A first fixing hole 812 is provided at one end of the mounting part 810 in the length direction, and the fixing hole is located below the radiation source mounting groove 811. A rotating hole 821 is provided at the top of the fixing part 820, and a second fixing hole is provided at the bottom. The fixing part 820 is suitable for being fixedly installed on the operating table 100. The rotating part 840 is of a columnar structure. One end is embedded and fixedly connected inside the first fixing hole 812, and the other end is embedded and rotatably connected inside the rotating hole 821. The cross-section of the rotating part 840 along the vertical circumferential direction is in a "convex" shape structure. The rotating part 840 includes a fixed end with a smaller cross-section in the length direction and a rotating end with a larger cross-section. The cross-section of the fixed end is square, and the cross-section of the rotating end is circular.

[0055] Specifically, before the radiation source detection and measurement, it is necessary to place the radiation source between the two detectors 300 by using a fixing member. Since the two radiation sources are located in the exact middle position between the two detectors 300, it is difficult to place the radiation source on the fixing member even if the two detectors 300 slide towards each other through the lower slide rail 400. In this application, a rotatable radiation source fixing member 800 is provided between the two detectors 300. When installing the radiation source, the two detectors 300 can be first slid towards each other through the slide rail 400, and there is a distance that allows the radiation source fixing member 800 to rotate. Then, the radiation source is rotated relative to the slide rail 400 to the outside of the two detectors 300. At this time, the radiation source is set on the radiation source mounting groove 811 of the radiation source fixing frame and rotated to between the two detectors 300. In this way, the radiation source can be conveniently and efficiently set between the two detectors 300 for use.

[0056] In a specific embodiment, it further includes: a movable member 700 and an operating table 100. The scale 500, the detector support frame 200, the movable member 700, and the slide rail 400 are arranged on the surface of the operating table 100. The movable member is a plate-like structure with a cross-section in a "U" shape, and the movable member 700 covers the upper part of the slide rail 400 and is detachably connected to the operating table 100, and the movable member 700 is located in the middle position of the slide rail 400. The operating table 100 provides an operable platform for the experiment. The movable member 700 can arrange the shielding assembly 600 and the radiation fixing member above the slide rail 400 without directly contacting the slide rail 400, so that the setting of the radiation source fixing member 800 and the shielding assembly 600 does not affect the use of the slide rail 400.

[0057] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to technologies in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A radiation source detection and measurement device, characterized in that: include: A detector support frame, wherein there are two detector support frames, the two detector support frames are arranged opposite to each other, and a γ detector and a β detector are respectively arranged on the two detector support frames, and the emission direction of the γ detector is opposite to the emission direction of the β detector; A slide rail, on which the two detector support frames are slidably arranged, and the two detector support frames can slide toward or relative to each other; A scale, the scale is arranged at the front side of the detector bracket, and the two detector support brackets are both provided with a measuring piece, the measuring piece abuts against the scale to measure the interval distance between the gamma detector and the beta detector; A shielding assembly, wherein the shielding assembly is disposed between the two detector support frames to shield the ray emission of the gamma detector and the beta detector; A radiation source fixing piece is arranged between the two detector support frames and is suitable for placing a radiation source.

2. The radiation source detection and measurement device according to claim 1, characterized in that: The detector support frame comprises: a support fixing plate, a support fixing column and a support mounting member; The supporting and fixing plate is a plate-shaped structure, which is arranged along the length direction of the slide rail, and the supporting and fixing plate is horizontally arranged on the slider of the slide rail and can slide relative to the length direction of the slide rail; The supporting and fixing column is a columnar structure, and is vertically arranged on the top surface of the supporting and fixing plate; The support mounting piece is an openable and closable annular structure, and the outer side of the support mounting piece is fixedly connected to the top of the support fixing column.

3. The radiation source detection and measurement device according to claim 2, characterized in that: There are more than two supporting and fixing columns, and the more than two supporting and fixing columns are arranged at intervals along the length direction of the supporting and fixing plate.

4. The radiation source detection and measurement device according to claim 3, characterized in that: The supporting fixing member comprises: a first fixing member and a second fixing member; The first fixing member is in a fan-shaped structure, with fixing ears on both sides, and the structure of the second fixing member is the same as that of the first fixing member; The fixing ears on both sides of the first fixing frame are connected with the fixing ears on both sides of the second fixing member by bolts.

5. The radiation source detection and measurement device according to claim 2, characterized in that: One end of the measuring ruler in the length direction is fixedly connected to the supporting fixing plate, and the other end is in contact with the scale of the scale, and the measuring ruler moves relative to the scale as the detector support slides.

6. The radiation source detection and measurement device according to claim 1, characterized in that: The shielding assembly comprises: a shielding plate and a shielding mounting member; The shielding mounting piece is in a "U"-shaped structure, with mounting grooves respectively opened along the two ends of the inner side. The shielding plate matches the mounting groove, and the shielding plate is embedded in the mounting groove to separate the gamma detector and the beta detector.

7. The radiation source detection and measurement device according to claim 6, characterized in that: The opening directions of the two installation grooves are opposite to each other, and the installation grooves are open structures along the opening direction of the shielding installation member; The cross section of the mounting groove is square; The shielding plate is a square structure with a preset thickness.

8. The radiation source detection and measurement device according to claim 1, characterized in that: The radiation source fixing member comprises: a mounting portion and a fixing portion; The fixing portion is a columnar structure, vertically located in the middle of the two detector support frames and on one side of the slide rail. The mounting portion is a long strip structure with a radiation source mounting groove penetrating the middle, and the mounting portion is rotatably arranged on the top of the fixing portion and rotates around the circumferential direction of the fixing portion.

9. The radiation source detection and measurement device according to claim 8, characterized in that: Also includes: Rotating part; A first fixing hole is provided at one end of the mounting portion in the length direction, and the fixing hole is located below the radiation source mounting slot; a rotation hole is provided at the top of the fixing portion, and a second fixing hole is provided at the bottom; the fixing portion is suitable for being fixedly mounted on an operating table; the rotating portion is a columnar structure, one end of which is embedded in the first fixing hole for fixed connection, and the other end of which is embedded in the rotating hole for rotation connection; The cross-section of the rotating part along the vertical circumferential direction is a "convex" shaped structure, and the rotating part includes a fixed end with a smaller cross-section in the length direction and a rotating end with a larger cross-section. The fixed end has a square cross-section and the rotating end has a circular cross-section.

10. The radiation source detection and measurement device according to claim 1, characterized in that: Also includes: Moving parts and operating table; The scale, the detector support frame, the movable part and the slide rail are arranged on the surface of the operating table; The movable part is a plate-like structure with a "U"-shaped cross-section, and the movable part cover is arranged above the slide rail and is detachably connected to the operating table. The movable part is located in the middle position of the slide rail, and the shielding assembly and the radiation source fixing part are arranged on the top of the movable part.

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