CN112068183A - 4 pi multi-filament proportional chamber for 4 pi beta-gamma coincidence measurement - Google Patents
4 pi multi-filament proportional chamber for 4 pi beta-gamma coincidence measurement Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/18—Measuring radiation intensity with counting-tube arrangements, e.g. with Geiger counters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/185—Measuring radiation intensity with ionisation chamber arrangements
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Abstract
The invention discloses a 4 pi multi-wire proportional chamber for 4 pi beta-gamma coincidence measurement, which comprises a frame, an upper cover plate, a lower cover plate, a supporting plate and an anode wire, wherein the upper cover plate is arranged on the frame; the upper cover plate covers the top surface of the frame, and the lower cover plate covers the bottom surface of the frame; the side surface of the frame is provided with a guide groove matched with the supporting plate; the supporting plate is used for placing radioactive sources, penetrates through the guide groove and is arranged in the frame; the interior of the frame is divided into an upper chamber and a lower chamber by the supporting plate; the upper chamber and the lower chamber are internally provided with anode wires; and two ends of the anode wire are fixed on the frame. The invention is used for the 4 pi multi-filament proportional chamber for 4 pi beta-gamma coincidence measurement, reduces the source preparation difficulty of the absolute measurement method for the radioactivity activity of the 4 pi beta-gamma coincidence measurement, and enables the 4 pi beta-gamma coincidence measurement method to be capable of directly measuring the radioactivity of large-area radioactive sources like plane sources.
Description
Technical Field
The invention relates to the technical field of ionizing radiation measurement, in particular to a 4 pi multi-filament proportional chamber for 4 pi beta-gamma coincidence measurement.
Background
The 4 pi beta-gamma coincidence measuring method is an absolute measuring method for measuring radioactivity. Because the method adopts coincidence technology and has extremely high accuracy on most beta-gamma nuclides, the corresponding 4 pi beta-gamma coincidence measuring device is established by the main metering institutions (NIMs) of various countries and is used as a reference device for measuring the radioactivity of one country. The 4 pi beta-gamma coincidence measuring device comprises two types of detectors which respectively detect two types of radioactive particles emitted in the same decay process. Among them, a detector for detecting β particles is called a β detector, and a detector for detecting γ particles is called a γ detector.
The beta detector in a 4 pi beta-gamma coincidence measurement device is typically a 4 pi proportional counter. The 4 pi proportional counter adopts the arrangement mode of a single anode wire, and the electric field distribution of the counter is divergent, so that the detection efficiency of radioactive substances at different positions in a radioactive source with a large area is inconsistent, and the measurement result is influenced.
In order to make the influence of the area of the radioactive source negligible, when preparing the radioactive source to be measured, people usually need to control the source diameter of the radioactive source within 3mm, so that the technical difficulty is high. In addition, for a planar source used in the application fields of nuclear technologies such as medical treatment, isotope production, environmental monitoring, industrial control and the like, the source diameter is usually larger than 10mm, so that the 4 pi beta-gamma coincidence measurement method cannot directly measure the radioactivity of the source without damaging a radioactive source.
Disclosure of Invention
The invention aims to solve the technical problem that in the prior art, a planar source with a larger source diameter is difficult to directly and effectively measure the radioactivity, and aims to provide a 4 pi multi-filament proportional chamber for 4 pi beta-gamma coincidence measurement to solve the problem.
The invention is realized by the following technical scheme:
the 4 pi multi-wire proportional chamber for 4 pi beta-gamma coincidence measurement comprises a frame, an upper cover plate, a lower cover plate, a supporting plate and an anode wire; the upper cover plate covers the top surface of the frame, and the lower cover plate covers the bottom surface of the frame;
the side surface of the frame is provided with a guide groove matched with the supporting plate; the supporting plate is used for placing radioactive sources, penetrates through the guide groove and is arranged in the frame;
the interior of the frame is divided into an upper chamber and a lower chamber by the supporting plate; the upper chamber and the lower chamber are internally provided with anode wires; and two ends of the anode wire are fixed on the frame.
When the method is applied, in order to reduce the source preparation difficulty of the 4 pi beta-gamma coincidence measurement method for the absolute measurement method of the radioactivity activity and simultaneously enable the 4 pi beta-gamma coincidence measurement method to be capable of directly measuring the radioactivity of large-area radioactive sources like plane sources, the 4 pi multi-filament proportional chamber is designed on the basis of the basic principle of the multi-filament proportional chamber and by utilizing the characteristic of uniform electric field of the multi-filament proportional chamber.
In the invention, the frame belongs to the main structure of the whole 4 pi multi-wire proportional chamber, and the upper end and the lower end of the frame are respectively fixed with an upper cover plate and a lower cover plate. The frame is of a symmetrical structure, the upper cover plate and the lower cover plate are completely the same, and an independent cavity which is symmetrical up and down is formed inside the frame after the three are connected. The support plate is a part for placing the radioactive source to be measured, and the radioactive source to be measured is moved from the outside to the inside of the 4 pi multifilament direct proportion room, so that the window-free measurement of the radioactive source is realized. The middle part of the frame is provided with a guide groove for the supporting plate to freely enter and exit in the independent cavity like a drawer. Meanwhile, the pallet divides the independent chamber into two completely symmetrical chambers, which are referred to as an upper chamber and a lower chamber, respectively.
In a working state, the frame, the upper cover plate, the lower cover plate and the supporting plate of the 4 pi multi-wire proportional chamber are used as cathodes, and the two rows of anode wires in the upper chamber and the lower chamber are used as anodes, so that independent electric fields are respectively formed in the upper chamber and the lower chamber. Since the radiation source is between two independent electric fields, the radioactive particles emitted into the 4 pi solid angle will be collected, thereby realizing the 4 pi solid angle detection.
The invention designs a 4 pi multi-wire proportional chamber which is specially used as a beta detector in a 4 pi beta-gamma coincidence measuring device based on the basic principle of the multi-wire proportional chamber and by utilizing the characteristic of uniform electric field of the multi-wire proportional chamber. The multi-wire proportional chamber is a detector developed successfully by Charpak et al in the sixties of the last century. The basic structure of the multi-wire proportional chamber is two cathode planes which are parallel to each other and an anode plane, wherein the anode plane is positioned between the two cathode planes and consists of a plurality of anode wires which are parallel to each other. Because the anode plane of the multi-wire proportional chamber is composed of a plurality of anode wires, compared with a proportional counter, the electric field distribution is uniform, and the sensitive area of the detector can be made larger, so that the multi-wire proportional chamber is an ideal choice for detecting a large-area radioactive source.
Further, the device also comprises a signal terminal and an adjusting terminal; one end of the anode wire is fixed on the frame through the adjusting terminal, and the other end of the anode wire is fixed on the frame through the signal terminal.
When the invention is applied, as an implementation mode, 7 equally-spaced signal terminals are respectively arranged on one side of the upper chamber and one side of the lower chamber and are used for leading out signals. And 7 adjusting terminals with equal intervals are respectively arranged on the other sides of the upper cavity and the lower cavity and used for adjusting the tightness degree of the anode wire. Each group of signal terminals and the adjusting terminals are coaxial, and anode wires are arranged on the axes of the signal terminals and the adjusting terminals for signal collection.
Furthermore, the signal terminal is used for leading out signals collected by the anode wire.
Furthermore, the adjusting terminal is used for adjusting the tightness degree of the anode wire.
Further, the device also comprises a protective cover; the protection casing set up in the frame side, just protection casing parcel signal terminal and regulation terminal.
Further, the device also comprises an air inlet nozzle and an air outlet nozzle; the air inlet nozzle is arranged on one side of the frame, and the air outlet nozzle is arranged on the other side of the frame;
and the air inlet direction of the air inlet nozzle and the air outlet direction of the air outlet nozzle are both parallel to the anode wire.
Furthermore, the air inlet nozzle is arranged at one end of a diagonal line of the frame, and the air outlet nozzle is arranged at the other end of the diagonal line of the frame.
When the invention is applied, the 4 pi multi-filament proportional chamber adopts a gas flow type structure, and a gas inlet nozzle and a gas outlet nozzle are respectively arranged on a frame of the proportional chamber. The direction of air inlet and air outlet is parallel to the anode wire, so that the anode wire is prevented from being damaged. The air inlet nozzle and the air outlet nozzle are arranged in a diagonal line, so that the air in the cavity is uniformly distributed.
Furthermore, the anode wires are multiple and are arranged in parallel.
Furthermore, counter bores for mounting the gamma detectors are arranged on the upper cover plate and the lower cover plate.
Furthermore, the supporting plate is provided with a through hole array penetrating through the supporting plate.
When the invention is applied, the through hole array can communicate the gas of the upper chamber and the lower chamber, so that the gas distribution of the upper chamber and the lower chamber is uniform and consistent.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention is used for the 4 pi multi-filament proportional chamber for 4 pi beta-gamma coincidence measurement, reduces the source preparation difficulty of the absolute measurement method for the radioactivity activity of the 4 pi beta-gamma coincidence measurement, and enables the 4 pi beta-gamma coincidence measurement method to be capable of directly measuring the radioactivity of large-area radioactive sources like plane sources.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a top view of the structure of the present invention.
Reference numbers and corresponding part names in the drawings:
the device comprises a frame 1, an upper cover plate 2, a lower cover plate 3, a supporting plate 4, a signal terminal 5, an adjusting terminal 6, an anode wire 7, an air inlet nozzle 8, an air outlet nozzle 9 and a protective cover 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
As shown in fig. 1 and 2, the 4 pi multi-wire proportional chamber for 4 pi β - γ coincidence measurement of the present invention includes a frame 1, an upper cover plate 2, a lower cover plate 3, a pallet 4, and an anode wire 7; the upper cover plate 2 covers the top surface of the frame 1, and the lower cover plate 3 covers the bottom surface of the frame 1;
a guide groove matched with the supporting plate 4 is formed in the side face of the frame 1; the supporting plate 4 is used for placing radioactive sources, and the supporting plate 4 penetrates through the guide groove and is arranged inside the frame 1;
the inside of the frame 1 is divided into an upper chamber and a lower chamber by the supporting plate 4; the upper chamber and the lower chamber are both provided with anode wires 7; and two ends of the anode wire 7 are fixed on the frame 1.
In the implementation of the embodiment, in order to reduce the source preparation difficulty of the 4 pi β - γ coincidence measurement method, and simultaneously enable the 4 pi β - γ coincidence measurement method to directly measure the radioactivity of large-area radioactive sources like planar sources, the 4 pi multi-filament proportional chamber is designed based on the basic principle of the multi-filament proportional chamber and by utilizing the characteristic of uniform electric field of the multi-filament proportional chamber.
In this embodiment, the frame is the main structure of the whole 4 pi multi-wire proportional chamber, and the upper end and the lower end of the frame are respectively fixed with an upper cover plate and a lower cover plate. The frame is of a symmetrical structure, the upper cover plate and the lower cover plate are completely the same, and an independent cavity which is symmetrical up and down is formed inside the frame after the three are connected. The support plate is a part for placing the radioactive source to be measured, and the radioactive source to be measured is moved from the outside to the inside of the 4 pi multifilament direct proportion room, so that the window-free measurement of the radioactive source is realized. The middle part of the frame is provided with a guide groove for the supporting plate to freely enter and exit in the independent cavity like a drawer. Meanwhile, the pallet divides the independent chamber into two completely symmetrical chambers, which are referred to as an upper chamber and a lower chamber, respectively.
In a working state, the frame, the upper cover plate, the lower cover plate and the supporting plate of the 4 pi multi-wire proportional chamber are used as cathodes, and the two rows of anode wires in the upper chamber and the lower chamber are used as anodes, so that independent electric fields are respectively formed in the upper chamber and the lower chamber. Since the radiation source is between two independent electric fields, the radioactive particles emitted into the 4 pi solid angle will be collected, thereby realizing the 4 pi solid angle detection.
The invention designs a 4 pi multi-wire proportional chamber which is specially used as a beta detector in a 4 pi beta-gamma coincidence measuring device based on the basic principle of the multi-wire proportional chamber and by utilizing the characteristic of uniform electric field of the multi-wire proportional chamber. The multi-wire proportional chamber is a detector developed successfully by Charpak et al in the sixties of the last century. The basic structure of the multi-wire proportional chamber is two cathode planes which are parallel to each other and an anode plane, wherein the anode plane is positioned between the two cathode planes and consists of a plurality of anode wires which are parallel to each other. Because the anode plane of the multi-wire proportional chamber is composed of a plurality of anode wires, compared with a proportional counter, the electric field distribution is uniform, and the sensitive area of the detector can be made larger, so that the multi-wire proportional chamber is an ideal choice for detecting a large-area radioactive source.
For further explaining the working process of the embodiment, the device further comprises a signal terminal 5 and an adjusting terminal 6; one end of the anode wire 7 is fixed on the frame 1 through the adjusting terminal 6, and the other end of the anode wire 7 is fixed on the frame 1 through the signal terminal 5.
For further explanation of the operation of the present embodiment, the signal terminal 5 is used for leading out the signal collected by the anode wire 7.
For further explanation of the operation of the present embodiment, the adjustment terminal 6 is used for adjusting the tightness of the anode wire 7.
In this embodiment, as an implementation manner, 7 equally-spaced signal terminals are respectively arranged on one side of the upper chamber and one side of the lower chamber, and are used for leading out signals. And 7 adjusting terminals with equal intervals are respectively arranged on the other sides of the upper cavity and the lower cavity and used for adjusting the tightness degree of the anode wire. Each group of signal terminals and the adjusting terminals are coaxial, and anode wires are arranged on the axes of the signal terminals and the adjusting terminals for signal collection.
For further explanation of the working process of the embodiment, the protective cover 10 is further included; the protective cover 10 is arranged on the side surface of the frame 1, and the protective cover 10 wraps the signal terminal 5 and the adjusting terminal 6.
For further explaining the working process of the embodiment, the device further comprises an air inlet nozzle 8 and an air outlet nozzle 9; the air inlet nozzle 8 is arranged on one side of the frame 1, and the air outlet nozzle 9 is arranged on the other side of the frame 1;
the air inlet direction of the air inlet nozzle 8 and the air outlet direction of the air outlet nozzle 9 are both parallel to the anode wire 7.
For further explaining the working process of the embodiment, the air inlet nozzle 8 is disposed at one end of the diagonal line of the frame 1, and the air outlet nozzle 9 is disposed at the other end of the diagonal line of the frame 1.
When the embodiment is implemented, the 4 pi multi-wire proportional chamber adopts a gas flow type structure, and the frame of the chamber is respectively provided with the air inlet nozzle and the air outlet nozzle. The direction of air inlet and air outlet is parallel to the anode wire, so that the anode wire is prevented from being damaged. The air inlet nozzle and the air outlet nozzle are arranged in a diagonal line, so that the air in the cavity is uniformly distributed.
For further explaining the operation process of the present embodiment, the anode wires 7 are multiple, and the multiple anode wires 7 are all arranged in parallel.
For further explaining the working process of the embodiment, the upper cover plate 2 and the lower cover plate 3 are both provided with counter bores for mounting the gamma detectors.
For further explaining the working process of the embodiment, the supporting plate 4 is provided with an array of through holes penetrating through the supporting plate 4.
When the embodiment is implemented, the through hole array can be communicated with the gas in the upper chamber and the gas in the lower chamber, so that the gas distribution in the upper chamber and the gas distribution in the lower chamber are uniform.
To further illustrate the working process of the present embodiment, in the present embodiment:
as shown in fig. 1 and fig. 2, the frame is formed by hollowing out a whole stainless steel block, and the periphery of the frame is 240mm long and 200mm wide; the hollow part is 180mm long and 160mm wide; height 50 mm. The upper side and the lower side of the frame are provided with threaded holes for connecting the upper cover plate and the lower cover plate with the upper cover plate and the lower cover plate through screws. The inboard processing of screw hole has the seal groove for place the sealing washer, and when upper cover plate and lower apron passed through the screw connection on the frame, the pressure that the screw produced will compress tightly the sealing washer, thereby realizes sealedly. A counter bore is processed in the center of the upper cover plate and the lower cover plate, the size of the counter bore is the same as the size of the front end of a gamma detector of the 4 pi beta-gamma coincidence measuring device, and the counter bore is used for positioning the gamma detector. The frame is of a symmetrical structure, the upper cover plate and the lower cover plate are completely the same, and an independent cavity which is symmetrical up and down is formed inside the frame after the three are connected.
The middle part of the frame is provided with a guide groove for the supporting plate to freely enter and exit in the independent cavity like a drawer. Meanwhile, the pallet divides the independent chamber into two completely symmetrical chambers, which are referred to as an upper chamber and a lower chamber, respectively. The middle of the supporting plate is provided with a counter bore with a large area, through holes are processed at equal intervals, and the structure is used for placing a radioactive source to be detected. The rest areas of the supporting plate are processed with through hole arrays for communicating the gas of the upper chamber and the lower chamber, so that the gas distribution of the upper chamber and the lower chamber is uniform. The sealing mode between the supporting plate and the frame also adopts a mode of pressing the sealing ring by a screw to realize sealing.
And 7 equally-spaced signal terminals are respectively arranged on one side of the upper cavity and one side of the lower cavity and used for leading out signals, wherein the distance between the signal terminals is 18 mm. The main structure of the signal terminal is made of polytetrafluoroethylene, an external thread is machined, and the good plasticity of the polytetrafluoroethylene is utilized and matched with the pulling force generated by the external thread and the nut, so that the sealing between the signal terminal and the frame is realized.
And 7 adjusting terminals at equal intervals are respectively arranged on the other sides of the upper chamber and the lower chamber and used for adjusting the tightness degree of the anode wire, wherein the distance between the adjusting terminals is 18 mm. The adjusting terminal is provided with external threads which are matched with the internal threads processed on the frame to realize the connection of the adjusting terminal and the frame. At the same time, the pressure generated by the threads will compress the sealing ring between the adjustment terminal and the frame to effect a seal.
Each group of signal terminals and the adjusting terminals are coaxial, and copper parts are arranged at the axial centers of the signal terminals and the adjusting terminals and used for welding the anode wires. Because the upper chamber and the lower chamber are respectively provided with 7 groups of signal terminals and adjusting terminals, the upper anode wire plane and the lower anode wire plane are respectively composed of 7 anode wires. In a working state, the frame, the upper cover plate, the lower cover plate and the supporting plate of the 4 pi multi-wire proportional chamber are used as cathodes, and the two rows of anode wires in the upper chamber and the lower chamber are used as anodes, so that independent electric fields are respectively formed in the upper chamber and the lower chamber. Since the radiation source is between two independent electric fields, the radioactive particles emitted into the 4 pi solid angle will be collected, thereby realizing the 4 pi solid angle detection.
The 4 pi multi-wire proportional chamber adopts a gas flow type structure, and an upper chamber and a lower chamber are respectively provided with an air inlet nozzle and an air outlet nozzle. The air inlet nozzle or the air outlet nozzle is respectively arranged beside the adjusting terminal or the signal terminal, and the air inlet direction and the air outlet direction are parallel to the anode wire, so that the anode wire is prevented from being damaged. The air inlet nozzle and the air outlet nozzle are arranged in a diagonal line, so that the air in the cavity is uniformly distributed.
The protective covers are respectively arranged on two sides of the 4 pi multi-wire proportional chamber and used for protecting two easily damaged parts, namely the signal terminal and the adjusting terminal, and meanwhile, the high-voltage electrode of the signal terminal is prevented from being directly exposed outside so as to protect the safety of measuring personnel.
As one or more alternative techniques to the present embodiment, the following variations may be employed:
if the mode of forming the independent chamber is changed into the mode of directly coupling the upper cover plate and the lower cover plate, the middle part of which is provided with the counter bore; changing the number or the spacing of the anode wires; the fixing mode of the anode wire does not adopt a signal terminal and an adjusting terminal, but adopts simple changes such as a mode of directly welding on surface metallization insulating ceramics and the like.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention, and do not indicate or imply that the components or mechanisms so referred to must be in a particular orientation, constructed and operated in a particular orientation, and thus are not to be considered as limiting the invention.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The 4 pi multi-wire proportional chamber for 4 pi beta-gamma coincidence measurement is characterized by comprising a frame (1), an upper cover plate (2), a lower cover plate (3), a supporting plate (4) and an anode wire (7); the upper cover plate (2) covers the top surface of the frame (1), and the lower cover plate (3) covers the bottom surface of the frame (1);
the side surface of the frame (1) is provided with a guide groove matched with the supporting plate (4); the supporting plate (4) is used for placing radioactive sources, and the supporting plate (4) penetrates through the guide groove and is arranged in the frame (1);
the interior of the frame (1) is divided into an upper chamber and a lower chamber by the supporting plate (4); the upper chamber and the lower chamber are both provided with anode wires (7); and two ends of the anode wire (7) are fixed on the frame (1).
2. The 4 pi multifilament proportional chamber for 4 pi beta-gamma coincidence measurements according to claim 1, characterized by further comprising a signal terminal (5) and an adjustment terminal (6); one end of the anode wire (7) is fixed on the frame (1) through the adjusting terminal (6), and the other end of the anode wire (7) is fixed on the frame (1) through the signal terminal (5).
3. 4 pi multi-wire proportional chamber for 4 pi beta-gamma coincidence measurement according to claim 2, characterized by the signal terminal (5) for extracting the signal collected by the anode wire (7).
4. 4 pi multifilament direct ratio chamber for 4 pi beta-gamma coincidence measurement according to claim 2, characterized by the fact that the adjustment terminal (6) is used for the adjustment of the tightness of the anodic filament (7).
5. The 4 pi multifilament proportional chamber for 4 pi beta-gamma coincidence measurements according to claim 2, characterized by further comprising a protective cover (10); the protection cover (10) is arranged on the side face of the frame (1), and the protection cover (10) wraps the signal terminal (5) and the adjusting terminal (6).
6. A 4 pi multifilament proportional chamber for 4 pi beta-gamma coincidence measurements according to claim 1, further comprising an inlet nozzle (8) and an outlet nozzle (9); the air inlet nozzle (8) is arranged on one side of the frame (1), and the air outlet nozzle (9) is arranged on the other side of the frame (1);
the air inlet direction of the air inlet nozzle (8) and the air outlet direction of the air outlet nozzle (9) are both parallel to the anode wire (7).
7. The 4 pi multifilar proportional chamber for 4 pi beta-gamma coincidence measurements according to claim 6, wherein the inlet nozzle (8) is arranged at one end of the diagonal of the frame (1) and the outlet nozzle (9) is arranged at the other end of the diagonal of the frame (1).
8. The 4 pi multifilar direct ratio chamber for 4 pi beta-gamma coincidence measurements according to claim 1, wherein said anodic wires (7) are multiple and multiple of said anodic wires (7) are all arranged in parallel.
9. The 4 pi multifilar proportional chamber for 4 pi beta-gamma coincidence measurement according to claim 1, wherein both the upper cover plate (2) and the lower cover plate (3) are provided with counter bores for mounting gamma detectors.
10. The 4 pi multifilament direct ratio chamber for 4 pi beta-gamma coincidence measurements according to claim 1, characterized in that the support plate (4) is provided with an array of through holes through the support plate (4).
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072268A (en) * | 1992-10-13 | 1993-05-19 | 四川材料与工艺研究所 | High-efficiency alpha beta detector |
| CN1710701A (en) * | 2005-06-23 | 2005-12-21 | 中国科学院紫金山天文台 | Position-sensitive multi-chamber directratio counter tube |
| CN101256240A (en) * | 2008-03-05 | 2008-09-03 | 中国原子能科学研究院 | Small-sized 4 pi beta proportional counter |
| CN102928864A (en) * | 2012-11-01 | 2013-02-13 | 成都理工大学 | Method and system for measuring gas tritium based on multi-wire proportional chamber |
| CN103926615A (en) * | 2014-04-23 | 2014-07-16 | 中国原子能科学研究院 | Two-pi multi-wire gas-flow proportional counter |
| CN105629285A (en) * | 2016-01-19 | 2016-06-01 | 中国计量科学研究院 | Multifilament proportional counter |
| CN108152846A (en) * | 2017-12-05 | 2018-06-12 | 中国原子能科学研究院 | A kind of digitalization radiation inert gas133Xe activity coincidence measurement devices |
| CN207717993U (en) * | 2017-12-19 | 2018-08-10 | 北京中合宏信科技有限公司 | Flow gas radioactive source activity measuring device |
| CN109358358A (en) * | 2018-09-10 | 2019-02-19 | 中国原子能科学研究院 | A kind of cylinder internal gas proportional counter |
| CN109490023A (en) * | 2018-11-09 | 2019-03-19 | 中国核动力研究设计院 | A kind of activity metering unit for the sampling of gas on-line continuous |
| JP2019190848A (en) * | 2018-04-18 | 2019-10-31 | キヤノン電子管デバイス株式会社 | Radiation position detector |
-
2020
- 2020-09-15 CN CN202010976486.8A patent/CN112068183A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072268A (en) * | 1992-10-13 | 1993-05-19 | 四川材料与工艺研究所 | High-efficiency alpha beta detector |
| CN1710701A (en) * | 2005-06-23 | 2005-12-21 | 中国科学院紫金山天文台 | Position-sensitive multi-chamber directratio counter tube |
| CN101256240A (en) * | 2008-03-05 | 2008-09-03 | 中国原子能科学研究院 | Small-sized 4 pi beta proportional counter |
| CN102928864A (en) * | 2012-11-01 | 2013-02-13 | 成都理工大学 | Method and system for measuring gas tritium based on multi-wire proportional chamber |
| CN103926615A (en) * | 2014-04-23 | 2014-07-16 | 中国原子能科学研究院 | Two-pi multi-wire gas-flow proportional counter |
| CN105629285A (en) * | 2016-01-19 | 2016-06-01 | 中国计量科学研究院 | Multifilament proportional counter |
| CN108152846A (en) * | 2017-12-05 | 2018-06-12 | 中国原子能科学研究院 | A kind of digitalization radiation inert gas133Xe activity coincidence measurement devices |
| CN207717993U (en) * | 2017-12-19 | 2018-08-10 | 北京中合宏信科技有限公司 | Flow gas radioactive source activity measuring device |
| JP2019190848A (en) * | 2018-04-18 | 2019-10-31 | キヤノン電子管デバイス株式会社 | Radiation position detector |
| CN109358358A (en) * | 2018-09-10 | 2019-02-19 | 中国原子能科学研究院 | A kind of cylinder internal gas proportional counter |
| CN109490023A (en) * | 2018-11-09 | 2019-03-19 | 中国核动力研究设计院 | A kind of activity metering unit for the sampling of gas on-line continuous |
Non-Patent Citations (5)
| Title |
|---|
| 复旦大学，清华大学，北京大学 合编: "《原子核物理实验方法》", 30 April 1981 * |
| 放射性核素强度的绝对测量讨论会与会人员: "《放射性核素强度的绝对测量（1979年讨论会资料选编）》", 30 November 1981 * |
| 李琦 等: "《一个用于4πβ＋4πγ活度测量的小型流气式正比计数器》", 《核电子学与探测技术》 * |
| 王汝赡 等: "《核辐射测量与防护》", 30 June 1990 * |
| 王贻芳: "《探索微世界•北京正负电子对撞机》", 31 May 2018 * |
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