CN101256240A - Small-sized 4 pi beta proportional counter - Google Patents
Small-sized 4 pi beta proportional counter Download PDFInfo
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- CN101256240A CN101256240A CNA2008100080528A CN200810008052A CN101256240A CN 101256240 A CN101256240 A CN 101256240A CN A2008100080528 A CNA2008100080528 A CN A2008100080528A CN 200810008052 A CN200810008052 A CN 200810008052A CN 101256240 A CN101256240 A CN 101256240A
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- small
- proportional counter
- shell
- copper pipe
- proportional
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000010949 copper Substances 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004809 Teflon Substances 0.000 claims description 5
- 229920006362 Teflon® Polymers 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 230000005684 electric field Effects 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 5
- -1 polytetrafluoroethylene Polymers 0.000 abstract 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract 1
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- AXGTXDWPVWSEOX-UHFFFAOYSA-N argon methane Chemical compound [Ar].[H]C[H].[H]C[H] AXGTXDWPVWSEOX-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004347 surface barrier Methods 0.000 description 1
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Abstract
The invention discloses a small 4 pi beta proportional counter, which mainly comprises an upper 2 pi proportional counter and a lower 2 pi proportional counter which are symmetrical in a columnar structure, wherein a gold-plated tungsten wire in the proportional counter is used as an anode, two ends of the gold-plated tungsten wire respectively penetrate through a copper pipe and are welded with the copper pipe, a shell of the proportional counter is used as a cathode, the copper pipe penetrates through the shell and is insulated from the shell through a polytetrafluoroethylene sleeve, the lower part of the device is connected with a base through a bolt, a spring is arranged between the copper pipe and the shell, and a sample support is arranged between the upper 2 pi proportional counter and the lower 2 pi. The invention provides a small 4 pi beta proportional counter which has the advantages of uniform electric field distribution, high signal-to-noise ratio and narrow pulse width and is suitable for the requirement of high counting rate measurement.
Description
Technical field
The present invention relates to a kind of radionuclide specific activity absolute measurement field, particularly a kind of small-sized 4 π β proportional counters.
Background technology
At present, prohibit the Related Experimental Study of examining under the strip spare and be badly in need of providing the accurate data of short-lived nuclide nuclear decay parameter, need set up corresponding measurement mechanism, at first must solve the design of detector under the narrow condition in space, the semiconductor detector of available technology adopting surface barrier type as beta rediation detector or two thin plastic scintillants as beta rediation detector, these two kinds of detectors are not suitable for surveying VYNS film source and its beta detection efficient is lower, be about 70～80%, can not satisfy the requirement of radioactivity absolute measurement well.Last century, the nineties 4 π β proportional counters were applied in the measurement mechanism, its 4 π β proportional counter the about 200V of plateau length, plateau slope because its Electric Field Distribution homogeneity is relatively poor, can not obtain better technical feature less than 1%/100V.
Summary of the invention
The present invention has overcome deficiency of the prior art, provides that a kind of Electric Field Distribution is even, signal to noise ratio (S/N ratio) is high, pulse width is narrow, has been applicable to that high count rate measures a kind of small-sized 4 π β proportional counters of demand.
In order to solve the problems of the technologies described above, the present invention realizes by the following technical programs:
This device mainly is made up of two 2 π proportional counters up and down of column structure symmetry, the gold-plated tungsten wire of proportional counter inside is as anode, the gold-plated tungsten wire two ends pass copper pipe and with its welding, the shell of proportional counter is as negative electrode, copper pipe passes shell and by teflon sleeve and its insulation, the device bottom is connected with base by bolt, key is to be provided with spring between described copper pipe and the shell, regulating the suffered tension force of gold-plated tungsten wire, describedly be provided with the sample holder between two 2 π proportional counters up and down.
In order to reduce the loaded down with trivial details work of welding between high-voltage power supply plug and the anode, the present invention is provided with the Female plug on described copper pipe.
Compared with prior art, the invention has the beneficial effects as follows: this device is by being provided with spring between copper pipe and the shell therein, utilize the tension force of spring to make more straight that gold-plated tungsten wire opens, thereby the Electric Field Distribution that it is produced under the plus high-pressure power supply is more even.Its described copper pipe also is provided with the Female plug, made things convenient for high-voltage power supply between repeat be connected.
Description of drawings
The small-sized 4 π β proportional counter structure cut-open views of Fig. 1
Fig. 2 uses
152The plateau curve that Eu film source records
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
A kind of small-sized 4 π β proportional counters, mainly form by two 2 π proportional counters up and down of the structural symmetry of column, the gold-plated tungsten wire 1a of proportional counter inside, 1b is as anode, gold-plated tungsten wire 1a, 1b passes at two ends copper pipe 2a, 2b, 3a, 3b and with its welding, the aluminium alloy of proportional counter or copper shell 4 are as negative electrode, copper pipe 2a, 2b, 3a, 3b passes shell 4 and passes through teflon sleeve 8a, 8b, 8c, 8d and shell 4 insulation, the device bottom is connected with base 9 by bolt, described copper pipe 2a, be provided with spring 5a between 2b and the shell 4,5b is provided with sample holder 6 between described up and down two 2 π proportional counters.Wherein Shang Fang 2 π proportional counter diameters are 90～200mm, highly be 20mm, the diameter of below 2 π proportional counters is 90～200mm, highly be 60mm, wherein the gold-plated tungsten wire 1 of anode is 20～50 μ m, need loaded down with trivial details welding job in order to reduce between high-voltage power supply plug and gold-plated tungsten wire 1a, the 1b, this device is provided with supporting Female plug 7a, 7b on described copper pipe 3a, 3b.The tension force of this device by coming regulating spring 5a, 5b at teflon sleeve 8a, 8b, the inner screw thread that is provided with of 8c, 8d and teflon bolt 10a, 10b, tension force by spring 5a, 5b can be regulated the suffered tension force of gold-plated tungsten wire 1a, 1b easily, can play that Electric Field Distribution is acted on uniformly.
Present embodiment adopts
152Physical Experiment has been carried out to its plateau characteristic in EuVYNS film source, and charges into argon methane in this device, records result such as Fig. 2, and its plateau length is near 300V, and plateau slope has technical feature preferably less than 1%/100V.
Claims (6)
1. small-sized 4 π β proportional counters, mainly form by two 2 π proportional counters up and down of the structural symmetry of column, gold-plated tungsten wire (the 1a of proportional counter inside, 1b) as anode, gold-plated tungsten wire (1a, 1b) copper pipe (2a is passed at two ends respectively, 2b, 3a, 3b) and with its welding, the shell of proportional counter (4) is as negative electrode, copper pipe (2a, 2b, 3a, 3b) pass shell (4) also by teflon sleeve (8a, 8b, 8c, 8d) with its insulation, the device bottom is connected with base (9) by bolt, it is characterized in that, described copper pipe (2a, 2b) and be provided with spring (5a between the shell, 5b), be provided with sample holder (6) between described up and down two 2 π proportional counters.
2. small-sized 4 π β proportional counters according to claim 1 is characterized in that described shell (4) is aluminium alloy or copper material.
3. small-sized 4 π β proportional counters according to claim 1 is characterized in that described copper pipe (3a, 3b) is provided with Female plug (7a, 7b).
4. small-sized 4 π β proportional counters according to claim 1 is characterized in that described gold-plated tungsten wire (1a, 1b) diameter is 20～50 μ m.
5. small-sized 4 π β proportional counters according to claim 1 is characterized in that the diameter of described top 2 π proportional counters is 90～200mm.
6. small-sized 4 π β proportional counters according to claim 1 is characterized in that the diameter of described below 2 π proportional counters is 90～200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100080528A CN101256240A (en) | 2008-03-05 | 2008-03-05 | Small-sized 4 pi beta proportional counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100080528A CN101256240A (en) | 2008-03-05 | 2008-03-05 | Small-sized 4 pi beta proportional counter |
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| Publication Number | Publication Date |
|---|---|
| CN101256240A true CN101256240A (en) | 2008-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100080528A Pending CN101256240A (en) | 2008-03-05 | 2008-03-05 | Small-sized 4 pi beta proportional counter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354648A (en) * | 2011-09-26 | 2012-02-15 | 南京三乐电子信息产业集团有限公司 | Novel double-anode counting tube and preparation method thereof |
| CN103308935A (en) * | 2013-05-16 | 2013-09-18 | 中国原子能科学研究院 | Electronics system of portable low-power-consumption tissue-equivalent proportional counter |
| CN103487823A (en) * | 2013-09-30 | 2014-01-01 | 山西中辐核仪器有限责任公司 | Manufacturing process of closed-gas large-area proportional counter used for measuring alpha and beta radioactive surface contamination |
| CN107272046A (en) * | 2017-06-09 | 2017-10-20 | 东莞中子科学中心 | Detector for measuring beam profile |
| CN109683187A (en) * | 2019-02-26 | 2019-04-26 | 中国测试技术研究院 | X/ γ and β personal dose equivalent measurement method based on stacked detecting structure |
| CN112068182A (en) * | 2020-09-15 | 2020-12-11 | 中国核动力研究设计院 | Multi-wire proportional chamber-based 4 pi beta-gamma coincidence measurement device and measurement method |
| CN112068183A (en) * | 2020-09-15 | 2020-12-11 | 中国核动力研究设计院 | 4 pi multi-filament proportional chamber for 4 pi beta-gamma coincidence measurement |
-
2008
- 2008-03-05 CN CNA2008100080528A patent/CN101256240A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354648A (en) * | 2011-09-26 | 2012-02-15 | 南京三乐电子信息产业集团有限公司 | Novel double-anode counting tube and preparation method thereof |
| CN103308935A (en) * | 2013-05-16 | 2013-09-18 | 中国原子能科学研究院 | Electronics system of portable low-power-consumption tissue-equivalent proportional counter |
| CN103308935B (en) * | 2013-05-16 | 2015-12-02 | 中国原子能科学研究院 | The electronic system of portable low power-consumption tissue-equivalent proportional counter |
| CN103487823A (en) * | 2013-09-30 | 2014-01-01 | 山西中辐核仪器有限责任公司 | Manufacturing process of closed-gas large-area proportional counter used for measuring alpha and beta radioactive surface contamination |
| CN103487823B (en) * | 2013-09-30 | 2015-06-03 | 山西中辐核仪器有限责任公司 | Manufacturing process of closed-gas large-area proportional counter used for measuring alpha and beta radioactive surface contamination |
| CN107272046A (en) * | 2017-06-09 | 2017-10-20 | 东莞中子科学中心 | Detector for measuring beam profile |
| CN107272046B (en) * | 2017-06-09 | 2023-10-03 | 东莞中子科学中心 | Detector for measuring beam profile |
| CN109683187A (en) * | 2019-02-26 | 2019-04-26 | 中国测试技术研究院 | X/ γ and β personal dose equivalent measurement method based on stacked detecting structure |
| CN112068182A (en) * | 2020-09-15 | 2020-12-11 | 中国核动力研究设计院 | Multi-wire proportional chamber-based 4 pi beta-gamma coincidence measurement device and measurement method |
| CN112068183A (en) * | 2020-09-15 | 2020-12-11 | 中国核动力研究设计院 | 4 pi multi-filament proportional chamber for 4 pi beta-gamma coincidence measurement |
| CN112068182B (en) * | 2020-09-15 | 2022-05-17 | 中国核动力研究设计院 | Multi-wire proportional chamber-based 4 pi beta-gamma coincidence measurement device and measurement method |
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Open date: 20080903 |