CN103344985A - Ocean in-situ anticoincidence shielding gamma energy spectrometer - Google Patents
Ocean in-situ anticoincidence shielding gamma energy spectrometer Download PDFInfo
- Publication number
- CN103344985A CN103344985A CN2013102908469A CN201310290846A CN103344985A CN 103344985 A CN103344985 A CN 103344985A CN 2013102908469 A CN2013102908469 A CN 2013102908469A CN 201310290846 A CN201310290846 A CN 201310290846A CN 103344985 A CN103344985 A CN 103344985A
- Authority
- CN
- China
- Prior art keywords
- anticoincidence
- detector
- energy spectrometer
- ocean
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The invention discloses an ocean in-situ anticoincidence shielding gamma energy spectrometer. The ocean in-situ anticoincidence shielding gamma energy spectrometer comprises two NaI (Tl) crystal detectors, wherein the two NaI (Tl) crystal detectors are arranged oppositely in an up-and-down mode, the NaI (Tl) crystal detector located on the upper portion is an anticoincidence detector, and the NaI (Tl) crystal detector located on the lower portion is a primary detector. A shielding cover made of composite materials is arranged outside the anticoincidence detector. Detection signals generated by the two detectors are transmitted to a signal processing circuit, the signal processing circuit carries out recording on the detection signals output by the primary detector, and when a same ray is received by both the two crystal detectors, the detection record of the ray is eliminated. According to the ocean in-situ anticoincidence shielding gamma energy spectrometer, substance shielding and the anticoincidence detector are arranged based on an existing ocean in-situ gamma energy spectrometer, the substance shielding is used for reducing the influences of rays of a carrying platform, cosmic rays and soft components of secondary rays of the cosmic rays, the anticoincidence detector is used for reducing the interference the cosmic rays and the high energy part in the secondary rays of the cosmic rays, therefore, the background of ocean environment is restrained, and the lower limit of the gamma energy spectrometer is reduced.
Description
Technical field
The invention belongs to Yu Haiyang radiological measuring technical field, specifically, relate to a kind of for the gamma energy spectrometer that marine environment is carried out radiological measuring.
Background technology
Radioactive nuclide in the ocean comprises natural radionuclide and artificial radionuclide.Natural radionuclide comprises three big natural radionuclides, independently long-lived primary nucleic and space are given birth to nucleic; Artificial radionuclide is the radioactive nuclide that has produced owing to human use's atomic energy since 20th century, and as nuclear power station, nuclear bomb, nuclear submarine etc., this just makes and the artificial radioactivity contact scar occurred in the marine environment.
When actinism that the radionuclide decay in the ocean produces is to the sea life body, its energy will be passed to molecule, cell, tissue and organ in the body, thereby the form and the function that cause molecule, cell, tissue and organ in the body change, even carcinogenesis or hereditary effect appear, cause marine food chain even human foods chain to be polluted thus, having a strong impact on human life security.Therefore, the radioactivity monitoring to the ocean is subject to people's attention day by day.
At present, known ocean original position gamma energy spectrometer only relies on single sensor to carry out gamma-ray testing, can't avoid carrying the secondary ray of the ray of platform and cosmic rays and cosmic rays for the influence of the ocean radioactive nuclide under the low sample-out count environment, thereby cause the inaccurate of measurement result.
Summary of the invention
The present invention is in order to solve the deficiency that the existing ray that can't avoid carrying platform of existing ocean original position gamma energy spectrometer and cosmic rays and secondary ray thereof disturb, original position anticoincidence shielding gamma energy spectrometer in a kind of ocean is provided, can suppress the background radiation of marine environment, reduce the detection limit of gamma energy spectrometer.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
Original position anticoincidence shielding gamma energy spectrometer in a kind of ocean comprises two NaI (Tl) crystal counter that is oppositely arranged up and down, and what be positioned at the top is the anticoincidence detector, is positioned at the main detector that is of below; Outer setting at the anticoincidence detector has radome; The detection signal that produces by two NaI (Tl) crystal counter transfers to signal processing circuit, described signal processing circuit is carried out record to the detection signal of main detector output, and when same ray is all received by described two NaI (Tl) crystal counter, eliminate this gamma-ray detection record.
Wherein, the composite shielding cover of described radome decision design stratification structure, ecto-entad is followed successively by stainless steel casing, cadmium absorbing sheet, interior lead ring and oxygen-free copper liner, can reduce to carry the soft component of ray and cosmic rays and the secondary ray thereof of platform.
Further, be respectively arranged with a NaI (Tl) crystal in described anticoincidence detector and main detector, two NaI (Tl) crystal is oppositely arranged up and down; Be respectively arranged with photomultiplier at each NaI (Tl) crystal, by photomultiplier amplification detection signal and export described signal processing circuit to.
To pass the cosmic rays of looking NaI (Tl) crystal and can incide down as much as possible and look in NaI (Tl) crystal in order to make, the area shape of adjacent surface that two NaI (Tl) crystal preferably is set is identical, and up and down fully relatively.
For when satisfying waterproof requirement, artificial ray can be received as much as possible, the case that has acetal material with very little photoelectric absorption cross section to make in the outer setting of described main detector by main detector.
Further, be provided with leaded steel alloy dividing plate between described anticoincidence detector and main detector, described radome and case are fixed on the described leaded steel alloy dividing plate.The thickness of leaded steel alloy dividing plate can shield the ray of ocean radioactive nuclide, passes down with minimizing and looks crystal and enter the ray of looking crystal.
Further again, described gamma energy spectrometer is thrown in the seawater by carrying platform, and described lift-launch platform can be hull or buoy; When described lift-launch platform is buoy, in buoy, offer the vertical shaft of up/down perforation, support is installed in vertical shaft, in the bottom of described support described gamma energy spectrometer is installed.
Preferably, described detection signal is pulse signal, when described main detector or anticoincidence detector receive the incident ray, exports amplitude pulse signal corresponding with the energy of incident ray to described signal processing circuit; Described signal processing circuit is carried out record to the pulse signal of main detector output, analyzes the energy of ray according to the amplitude of pulse signal, and forming can spectrogram; When signal processing circuit detects anticoincidence detector and main detector simultaneously during output pulse signal, eliminate described pulse signal.
As a kind of preferred circuit teaming method of described signal processing circuit, in described signal processing circuit, be provided with two prime amplifiers, two controllable amplifiers, two analog to digital conversion circuits and a main control unit; The detection signal of described anticoincidence detector output carries out the signal amplification through first prime amplifier and first controllable amplifier successively, and after first analog to digital conversion circuit carries out analog to digital conversion, generates digital signal and export main control unit to; The detection signal of described main detector output carries out the signal amplification through second prime amplifier and second controllable amplifier successively, and after second analog to digital conversion circuit carries out analog to digital conversion, generates digital signal and export main control unit to; Described main control unit generates according to the digital signal that receives can spectrogram.
Further, be provided with master controller, programmable logic chip and D/A converting circuit in described main control unit, described programmable logic chip receives the digital signal of two analog to digital conversion circuit outputs, analyzes to generate the energy spectrogram.Master controller is finished the functions such as sequential control, command response and data communication of energy spectrometer, when master controller detects line drift, exportable enlargement factor is adjusted signal to D/A converting circuit, after D/A converting circuit converts simulating signal to, export two controllable amplifiers respectively to, the enlargement factor of two controllable amplifiers is adjusted.
Compared with prior art, advantage of the present invention and good effect are: the present invention increases material shielding and anticoincidence detector by the basis at existing ocean original position gamma energy spectrometer, utilize the material shielding to reduce to carry the ray of platform and the influence of cosmic rays and secondary ray soft component thereof, utilize the anticoincidence detector to reduce the interference of the high energy part in cosmic rays and the secondary ray thereof, the background that has effectively suppressed marine environment has thus reduced the detection limit of gamma energy spectrometer.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, other characteristics of the present invention and advantage will become clearer.
Description of drawings
Fig. 1 is the physical construction synoptic diagram that ocean original position anticoincidence proposed by the invention shields a kind of embodiment of gamma energy spectrometer;
Fig. 2 is the structural representation that carries a kind of embodiment of platform;
Fig. 3 is the schematic block circuit diagram that ocean original position anticoincidence proposed by the invention shields a kind of embodiment of gamma energy spectrometer.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
The ocean original position anticoincidence shielding gamma energy spectrometer of present embodiment is in order to eliminate the interference that the ray that carries platform and cosmic rays and secondary ray thereof produce the ocean radiological measuring, in gamma energy spectrometer, be provided with two NaI (Tl) crystal counter, and two NaI (Tl) crystal counter is arranged to relative up and down position relation, what be positioned at the top is called the anticoincidence detector, is positioned at the main detector that is called of below.In order to reduce to carry the ray of platform and the soft component of cosmic rays enters detector, present embodiment also is provided with radome in the outside of anticoincidence detector, utilizes described radome to shield effectively the ray of lift-launch platform and the soft component of cosmic rays; Utilize described anticoincidence detector can reduce the interference of the high energy part in cosmic rays and the secondary ray thereof, thereby suppressed the background of marine environment, reduced the detection limit of gamma energy spectrometer.
A kind of preferred design as present embodiment, in described main detector and anticoincidence detector, be respectively arranged with a NaI (Tl) crystal 1,2, be respectively arranged with for the faint optical signal with two NaI (Tl) crystal 1,2 output at two NaI (Tl) crystal 1,2 and change electric signal into, and the photomultiplier 3,4 that is amplified pro rata, referring to shown in Figure 1.For describe clear for the purpose of, the NaI in the main detector (Tl) crystal 1 is referred to as down to look crystal, the NaI in the anticoincidence detector (Tl) crystal 2 is referred to as to look crystal.Will on look crystal 2 and down look crystal 1 and be oppositely arranged up and down, the area that the adjacent surface of looking crystal 2 and looking crystal 1 down preferably is set is identical with shape, and complete relative up and down, as shown in Figure 1.For example: two cylindrical NaI (Tl) crystal that can select to wait radius as look on described crystal 2 and under look crystal 1, and stack setting up and down, form described gamma energy spectrometer.In the bottom surface of looking crystal 1 down photomultiplier 3 is set, the area of the light-sensitive surface of described photomultiplier 3 is should be as far as possible suitable with the base area of looking crystal 1 down, with effective reception by looking the light signal that crystal 1 sends down.In like manner, at the end face of looking crystal 2 photomultiplier 4 is set, preferably adopts the photomultiplier 4 of a plurality of small sizes to be distributed in the end face of looking crystal 2, reception as much as possible is by looking the light signal of crystal 2 conversion output when reducing the radome size.
In the present embodiment, the composite shielding cover of described radome decision design stratification structure, cover is buckled in the outside of looking crystal 2 and photomultiplier 4, and ecto-entad is followed successively by stainless steel casing 11, cadmium absorbing sheet 10, interior lead ring 9 and oxygen-free copper liner 8, referring to shown in Figure 1.Wherein, stainless steel casing 11 can play the effect of waterproof, anticorrosion and mechanical support; Cadmium absorbing sheet 10 is as the thermal neutron screen layer; Interior lead layer 9 is used for shielding and carries the ray of platform and the soft component of cosmic rays and secondary ray thereof; Oxygen-free copper liner 8 is mainly used in shielding
210The Pb daughter
210The bremsstrahlung that the β ray of Bi produces.
In order to adapt to the underwater operation environment of gamma energy spectrometer, also cover in the described outside of looking crystal 1 and photomultiplier 3 down and to be buckled with case 5, referring to shown in Figure 1.The described case 5 preferred materials with very little photoelectric absorption cross section that adopt are made, for example acetal material or PVC material etc.When main detector being played waterproof, withstand voltage effect, guarantee that as much as possible the injecting down of ray of ocean radioactive nuclide generation looked crystal 1, improve main detector to the gamma-ray detection efficiency of ocean radioactive nuclide.
Look crystal 2 and under look and also be provided with dividing plate 7 between the crystal 1, as shown in Figure 1, preferably adopt the leaded steel alloy material to make described dividing plate 7.Stainless steel casing 11 and the case 5 of radome are installed on the leaded steel alloy dividing plate 7 by securing member 6 respectively, to realize radome and case 5 installing and fixing on leaded steel alloy dividing plate 7.Utilize described leaded steel alloy dividing plate 7 can also shield the gamma-rays of ocean radioactive nuclide, pass down with minimizing and look crystal 1 and enter the ray of looking crystal 2.
The gamma energy spectrometer of present embodiment is rendered in the waters to be detected by carrying platform, gamma energy spectrometer is immersed under water fully, detect the gamma-rays of ocean radioactive nuclide.In the present embodiment, described lift-launch platform can be hull (for example ocean monitoring ship etc.), also can be buoy 12, referring to shown in Figure 2.If adopt hull as carrying platform, then can directly by support described gamma energy spectrometer be thrown in the seawater, carry out boating type and measure.Behind to be detected the finishing, pack up support, can realize that the safety of gamma energy spectrometer reclaims.If adopt buoy 12 as carrying platform, then can offer the vertical shaft 13 of up/down perforation at buoy 12, as shown in Figure 2, mounting bracket 14 in vertical shaft 13 is installed described gamma energy spectrometer 15 in the bottom of support 14 then.Like this, when putting into buoy 12 in the waters to be detected, can make gamma energy spectrometer 15 immerse the water surface fully below 16, detect the gamma-rays of ocean radioactive nuclide.Behind to be detected the finishing, mention support 14, i.e. recoverable gamma energy spectrometer 15.
After rendering in to be detected waters by the lift-launch platform gamma energy spectrometer 15, the seawater that is positioned at gamma energy spectrometer 15 tops can mask part from the ray that carries platform and neutron and the soft component of cosmic rays and secondary ray thereof.Cosmic rays or its secondary ray higher for energy may penetrate radome, inject and look crystal 2.If this ray can penetrate leaded steel alloy dividing plate 7 and injects down when looking crystal 1 again, the photomultiplier 3,4 by main detector and anticoincidence detector all can output detection signal, transfers to signal processing circuit.Described signal processing circuit is carried out record to the detection signal of main detector output, and when detecting same ray and received by two NaI (Tl) crystal 1,2, thinks that this ray is from cosmic rays or its secondary ray.Because this cosmic rays and secondary ray thereof are not the gamma-rays that the ocean radioactive nuclide produces, therefore, signal processing circuit is eliminated the detection record of this ray, is not used in follow-up power spectrum map generalization process.Just overcome the ray that carries platform and cosmic rays and secondary ray thereof thus to the influence that radioactive nuclide under the low background environment of Yu Haiyang detects, significantly reduced the detection limit of gamma energy spectrometer.
In the present embodiment, main detector and anticoincidence detector are exported the detection signal that collects with the form of pulse signal, namely export the amplitude pulse signal corresponding with described gamma-ray energy.When signal processing circuit detects main detector pulse signal output is arranged, and the anticoincidence detector is not when having pulse signal output, the pulse signal of record main detector output is effective; If when signal processing circuit detects main detector and has pulse signal to export, the anticoincidence detector also has pulse signal output, think that then main detector that this incides and the ray of anticoincidence detector are from same cosmic rays or its secondary ray, this moment, the signal processing circuit judgement this time was recorded as invalid record, eliminate this record, and then reach and eliminate the influence that cosmic rays and secondary ray thereof detect radioactive nuclide under the low sample-out count environment in ocean.
A kind of preferred design as described signal processing circuit, in order to realize the reliable reception to the pulse signal of main detector and the output of anticoincidence detector, in the present embodiment, described signal processing circuit mainly adopts two prime amplifiers, two controllable amplifiers, two analog to digital conversion circuits (A/D circuit) and main control units to set up and form, referring to shown in Figure 3.Wherein, pulse detection signals by the conversion of the photomultiplier PMT1 in anticoincidence detector output, at first transfer to first prime amplifier, after the amplification of carrying out signal via first prime amplifier is handled, export first controllable amplifier to and do further to amplify to handle; Amplified pulse signal transfers to an A/D circuit, analog signal conversion is become digital signal after, export main control unit to and handle.In like manner, carrying out signal via second prime amplifier, second controllable amplifier successively by the pulse detection signals of the conversion of the photomultiplier PMT2 in main detector output amplifies, and after carrying out analog-to-digital conversion process by the 2nd A/D circuit, generate digital data transmission to main control unit, generate the energy spectrogram to analyze.
In described main control unit, be provided with master controller, programmable logic chip CPLD and D/A converting circuit (D/A circuit), referring to shown in Figure 3.Wherein, programmable logic chip CPLD receives the digital signal of two analog to digital conversion circuits outputs, and carry out that filtering and noise reduction, baseline recover, the anticoincidence power spectrum is synthetic and a series of processing such as pulse amplitude analysis after, generating can spectrogram; Master controller is finished the functions such as sequential control, command response and data communication of energy spectrometer.Because photomultiplier PMT1, PMT2 are when work, its enlargement factor can change because of the temperature variation of working environment, and then cause the drift of spectral line, when master controller detects spectral line generation drift, produce control signal according to drift value and export the D/A circuit to, after the D/A circuit converts digital signal to simulating signal, transfer to two controllable amplifiers respectively, enlargement factor to two controllable amplifiers is adjusted, and realizes the spectrum stabilization function.
Certainly, the above only is a kind of preferred implementation of the present invention, should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. an ocean original position anticoincidence shields gamma energy spectrometer, it is characterized in that: comprise two NaI (Tl) crystal counter that is oppositely arranged up and down, what be positioned at the top is the anticoincidence detector, is positioned at the main detector that is of below; Outer setting at the anticoincidence detector has radome; The detection signal that produces by two NaI (Tl) crystal counter transfers to signal processing circuit, described signal processing circuit is carried out record to the detection signal of main detector output, and when same ray is all received by described two NaI (Tl) crystal counter, eliminate the detection record of this ray.
2. ocean original position anticoincidence according to claim 1 shields gamma energy spectrometer, and it is characterized in that: be respectively arranged with a NaI (Tl) crystal in described anticoincidence detector and main detector, two NaI (Tl) crystal is oppositely arranged up and down; Be respectively arranged with photomultiplier at each NaI (Tl) crystal, by photomultiplier amplification detection signal and export described signal processing circuit to.
3. ocean original position anticoincidence according to claim 2 shields gamma energy spectrometer, and it is characterized in that: the area shape of the adjacent surface of described two NaI (Tl) crystal is identical, and up and down fully relatively.
4. ocean original position anticoincidence according to claim 1 shields gamma energy spectrometer, it is characterized in that: described radome is the composite shielding cover of layer structure, and ecto-entad is followed successively by stainless steel casing, cadmium absorbing sheet, interior lead ring and oxygen-free copper liner.
5. ocean original position anticoincidence according to claim 1 shields gamma energy spectrometer, and it is characterized in that: the outer setting at described main detector has the case of being made by the acetal material.
6. ocean original position anticoincidence according to claim 5 shields gamma energy spectrometer, and it is characterized in that: be provided with leaded steel alloy dividing plate between described anticoincidence detector and main detector, described radome and case are fixed on the described leaded steel alloy dividing plate.
7. according to each described ocean original position anticoincidence shielding gamma energy spectrometer in the claim 1 to 6, it is characterized in that: described gamma energy spectrometer is thrown in the entry by carrying platform, and described lift-launch platform is hull or buoy; When described lift-launch platform is buoy, in buoy, offer the vertical shaft of up/down perforation, support is installed in vertical shaft, in the bottom of described support described gamma energy spectrometer is installed.
8. according to each described ocean original position anticoincidence shielding gamma energy spectrometer in the claim 1 to 6, it is characterized in that: described detection signal is pulse signal, when described main detector or anticoincidence detector receive the incident ray, export amplitude pulse signal corresponding with the energy of incident ray to described signal processing circuit; Described signal processing circuit is carried out record to the pulse signal of main detector output, analyzes the energy of ray according to the amplitude of pulse signal, and forming can spectrogram; When signal processing circuit detects anticoincidence detector and main detector simultaneously during output pulse signal, eliminate described pulse signal.
9. according to each described ocean original position anticoincidence shielding gamma energy spectrometer in the claim 1 to 6, it is characterized in that: in described signal processing circuit, be provided with two prime amplifiers, two controllable amplifiers, two analog to digital conversion circuits and a main control unit; The detection signal of described anticoincidence detector output carries out the signal amplification through first prime amplifier and first controllable amplifier successively, and after first analog to digital conversion circuit carries out analog to digital conversion, generates digital signal and export main control unit to; The detection signal of described main detector output carries out the signal amplification through second prime amplifier and second controllable amplifier successively, and after second analog to digital conversion circuit carries out analog to digital conversion, generates digital signal and export main control unit to; Described main control unit generates according to the digital signal that receives can spectrogram.
10. original position anticoincidence shielding gamma energy spectrometer in ocean according to claim 9 is characterized in that: be provided with master controller, programmable logic chip and D/A converting circuit in described main control unit; Described programmable logic chip receives the digital signal of two analog to digital conversion circuit outputs, analyzes to generate the energy spectrogram; Master controller is finished sequential control, command response and the data communication function of energy spectrometer, when master controller detects line drift, output is used for adjusting the D/A converting circuit that controls signal to of enlargement factor, after D/A converting circuit converts simulating signal to, export two controllable amplifiers respectively to, the enlargement factor of two controllable amplifiers is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102908469A CN103344985A (en) | 2013-07-11 | 2013-07-11 | Ocean in-situ anticoincidence shielding gamma energy spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102908469A CN103344985A (en) | 2013-07-11 | 2013-07-11 | Ocean in-situ anticoincidence shielding gamma energy spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103344985A true CN103344985A (en) | 2013-10-09 |
Family
ID=49279798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102908469A Pending CN103344985A (en) | 2013-07-11 | 2013-07-11 | Ocean in-situ anticoincidence shielding gamma energy spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103344985A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104199080A (en) * | 2014-09-09 | 2014-12-10 | 中国科学院上海应用物理研究所 | Detection system and detection method for measuring beta-ray generated by radioactive gas |
| CN105425275A (en) * | 2015-07-19 | 2016-03-23 | 成都理工大学 | Anti-coincidence output discrimination system and anti-coincidence discrimination algorithm thereof |
| CN105487100A (en) * | 2015-12-31 | 2016-04-13 | 中国科学院青海盐湖研究所 | Fixed-type plastic crystal potassium tester |
| CN105510956A (en) * | 2015-07-19 | 2016-04-20 | 成都理工大学 | Anti-Compton scattering detector |
| CN105496432A (en) * | 2015-11-24 | 2016-04-20 | 中国原子能科学研究院 | Anti-universe ray system for internal exposure measurement and anti-coincidence method |
| CN106094002A (en) * | 2016-07-28 | 2016-11-09 | 中国船舶重工集团公司第七〇九研究所 | A kind of Miniature Buoy formula water body region gamma activity monitor |
| CN107219548A (en) * | 2017-07-31 | 2017-09-29 | 四川省核工业地质调查院 | A kind of portable anti-Compton survey meter |
| CN107290773A (en) * | 2017-07-31 | 2017-10-24 | 四川省核工业地质调查院 | A kind of device and method of spectral measurement |
| CN107884804A (en) * | 2017-11-27 | 2018-04-06 | 中核控制系统工程有限公司 | A kind of β measurement apparatus based on anticoincidence technique |
| CN108008440A (en) * | 2018-02-01 | 2018-05-08 | 北京中科核安科技有限公司 | low background α, β measuring device |
| CN108287362A (en) * | 2017-12-14 | 2018-07-17 | 卡迪诺科技(北京)有限公司 | The ultralow background HPGe gamma ray spectrometers of anticoincidence |
| CN108845517A (en) * | 2018-04-26 | 2018-11-20 | 上海飞来信息科技有限公司 | Anticoincidence circuit and pulse signal detection circuit |
| CN111307837A (en) * | 2020-03-20 | 2020-06-19 | 中国核动力研究设计院 | Radioactive substance content measuring device clamped in flow channel and model establishing method |
| CN111999775A (en) * | 2020-08-06 | 2020-11-27 | 中国石油天然气集团有限公司 | Coincidence measurement energy spectrum processing method |
| CN112068180A (en) * | 2020-09-15 | 2020-12-11 | 成都理工大学 | Online measuring device and method for alpha and beta radioactive nuclides in water body |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0815441A (en) * | 1994-06-24 | 1996-01-19 | Genshiryoku Eng:Kk | Gamma-ray detector |
| JPH11311677A (en) * | 1998-04-28 | 1999-11-09 | Aloka Co Ltd | Radioactive gas monitor and fuel rod surveillance device |
| CN1421708A (en) * | 2002-12-26 | 2003-06-04 | 中国科学院紫金山天文台 | Special gamma spectrograph for moon exploration |
| CN101251601A (en) * | 2008-04-07 | 2008-08-27 | 西北核技术研究所 | Dispersion type scintillation detector for impulse gamma detection |
| CN103197338A (en) * | 2013-04-19 | 2013-07-10 | 清华大学 | Underwater radiation monitoring method and system |
-
2013
- 2013-07-11 CN CN2013102908469A patent/CN103344985A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0815441A (en) * | 1994-06-24 | 1996-01-19 | Genshiryoku Eng:Kk | Gamma-ray detector |
| JPH11311677A (en) * | 1998-04-28 | 1999-11-09 | Aloka Co Ltd | Radioactive gas monitor and fuel rod surveillance device |
| CN1421708A (en) * | 2002-12-26 | 2003-06-04 | 中国科学院紫金山天文台 | Special gamma spectrograph for moon exploration |
| CN101251601A (en) * | 2008-04-07 | 2008-08-27 | 西北核技术研究所 | Dispersion type scintillation detector for impulse gamma detection |
| CN103197338A (en) * | 2013-04-19 | 2013-07-10 | 清华大学 | Underwater radiation monitoring method and system |
Non-Patent Citations (3)
| Title |
|---|
| 刁立军 等: "用反符合和热中子屏蔽降低γ谱仪本底", 《核技术》 * |
| 罗耀耀: "航空γ能谱系统中自动稳谱的研究与实现", 《中国优秀硕士学位论文全文数据库 基础科学辑》 * |
| 苏琼 等: "反符合屏蔽γ谱仪中宇宙线辐射本底的减弱", 《原子能科学技术》 * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104199080A (en) * | 2014-09-09 | 2014-12-10 | 中国科学院上海应用物理研究所 | Detection system and detection method for measuring beta-ray generated by radioactive gas |
| CN105425275A (en) * | 2015-07-19 | 2016-03-23 | 成都理工大学 | Anti-coincidence output discrimination system and anti-coincidence discrimination algorithm thereof |
| CN105510956A (en) * | 2015-07-19 | 2016-04-20 | 成都理工大学 | Anti-Compton scattering detector |
| CN105425275B (en) * | 2015-07-19 | 2017-04-19 | 成都理工大学 | Anti-coincidence output discrimination system |
| CN105510956B (en) * | 2015-07-19 | 2017-05-24 | 成都理工大学 | Anti-Compton scattering detector |
| CN105496432A (en) * | 2015-11-24 | 2016-04-20 | 中国原子能科学研究院 | Anti-universe ray system for internal exposure measurement and anti-coincidence method |
| CN105487100A (en) * | 2015-12-31 | 2016-04-13 | 中国科学院青海盐湖研究所 | Fixed-type plastic crystal potassium tester |
| CN106094002A (en) * | 2016-07-28 | 2016-11-09 | 中国船舶重工集团公司第七〇九研究所 | A kind of Miniature Buoy formula water body region gamma activity monitor |
| CN107219548B (en) * | 2017-07-31 | 2023-10-27 | 四川省核地质调查研究所 | Portable anti-Compton detector |
| CN107219548A (en) * | 2017-07-31 | 2017-09-29 | 四川省核工业地质调查院 | A kind of portable anti-Compton survey meter |
| CN107290773A (en) * | 2017-07-31 | 2017-10-24 | 四川省核工业地质调查院 | A kind of device and method of spectral measurement |
| CN107884804A (en) * | 2017-11-27 | 2018-04-06 | 中核控制系统工程有限公司 | A kind of β measurement apparatus based on anticoincidence technique |
| CN108287362A (en) * | 2017-12-14 | 2018-07-17 | 卡迪诺科技(北京)有限公司 | The ultralow background HPGe gamma ray spectrometers of anticoincidence |
| CN108287362B (en) * | 2017-12-14 | 2019-12-31 | 卡迪诺科技(北京)有限公司 | Anti-coincidence ultra-low background HPGe gamma spectrometer |
| CN108008440A (en) * | 2018-02-01 | 2018-05-08 | 北京中科核安科技有限公司 | low background α, β measuring device |
| CN108008440B (en) * | 2018-02-01 | 2024-02-27 | 北京中科核安科技有限公司 | Low background alpha, beta measuring device |
| CN108845517A (en) * | 2018-04-26 | 2018-11-20 | 上海飞来信息科技有限公司 | Anticoincidence circuit and pulse signal detection circuit |
| CN111307837A (en) * | 2020-03-20 | 2020-06-19 | 中国核动力研究设计院 | Radioactive substance content measuring device clamped in flow channel and model establishing method |
| CN111307837B (en) * | 2020-03-20 | 2022-07-01 | 中国核动力研究设计院 | Radioactive substance content measuring device clamped in flow channel and model establishing method |
| CN111999775A (en) * | 2020-08-06 | 2020-11-27 | 中国石油天然气集团有限公司 | Coincidence measurement energy spectrum processing method |
| CN111999775B (en) * | 2020-08-06 | 2024-03-01 | 中国石油天然气集团有限公司 | Method for processing coincidence measurement energy spectrum |
| CN112068180A (en) * | 2020-09-15 | 2020-12-11 | 成都理工大学 | Online measuring device and method for alpha and beta radioactive nuclides in water body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103344985A (en) | Ocean in-situ anticoincidence shielding gamma energy spectrometer | |
| CN203502589U (en) | Sea original position anticoincidence shielding gamma energy disperse spectroscopy | |
| Nezrick et al. | Fission-antineutrino interaction with protons | |
| JP2009180660A (en) | Radiation monitor | |
| SE8404588L (en) | DEVICE FOR Saturation of nuclear radiation and gamma or scintillation chamber with such device | |
| ES465869A1 (en) | Instrumentation assembly for nuclear reactor | |
| Moss et al. | Neutron detectors for active interrogation of highly enriched uranium | |
| US20090114824A1 (en) | Mask for coded aperture systems | |
| Haga et al. | Gamma-ray sensitivity and shielding of a neutron imaging plate | |
| CN111736201A (en) | Nuclear fuel rod active detection system and method | |
| Sun et al. | A compact NaI (Tl) with avalanche photodiode gamma spectrometer for in situ radioactivity measurements in marine environment | |
| Bell et al. | Neutron detection with mercuric iodide | |
| Osvath et al. | Underwater gamma surveys of Mururoa and Fangataufa lagoons | |
| RU2158011C2 (en) | Neutron and gamma-ray recording detector | |
| Learned | Reactor Monitoring (near and far) with Neutrinos | |
| Ban et al. | SoLid: Search for Oscillations with Lithium-6 Detector at the SCK-CEN BR2 reactor | |
| Lee et al. | Conceptual development of sensing module applied to autonomous radiation monitoring system for marine environment | |
| RU99237U1 (en) | SETTING THE MEASUREMENT OF NUCLEAR FUEL BURNING | |
| Asai et al. | Detailed design of ex-vessel neutron yield monitor for ITER | |
| Wang et al. | A Miniaturized Gamma-ray Spectrometer based on CdZnTe Semiconductor and BGO Scintillator | |
| Watanabe et al. | Ocean Bottom Detector: frontier of technology for understanding the mantle by geoneutrinos | |
| CN217034267U (en) | On-line detection detector for content of plutonium dioxide in MOX fuel rod pellet | |
| CN208367221U (en) | A kind of nuclear radiation shield bracket used on transporting belt | |
| RU2435238C1 (en) | In-core control and protection system of reactor core of water-to-water power reactor | |
| Paulus et al. | Enhancement of peak-to-total ratio in gamma-ray spectroscopy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131009 |