CN202013424U - Novel portable gamma energy spectrometer - Google Patents
Novel portable gamma energy spectrometer Download PDFInfo
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- CN202013424U CN202013424U CN2011200925589U CN201120092558U CN202013424U CN 202013424 U CN202013424 U CN 202013424U CN 2011200925589 U CN2011200925589 U CN 2011200925589U CN 201120092558 U CN201120092558 U CN 201120092558U CN 202013424 U CN202013424 U CN 202013424U
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Abstract
The utility model discloses a novel portable gamma energy spectrometer, comprising a gamma detector, a photoelectric conversion unit, an emitter follower, a high voltage power supply, a processing unit, a display unit and a power supply unit, wherein the gamma detector is connected with the photoelectric conversion unit, the photoelectric conversion unit is respectively connected with the emitter follower and the high voltage power supply, the emitter follower is connected with the processing unit, and the processing unit is respectively connected with the power supply unit and the display unit. The portable gamma energy spectrometer has the advantages of simple structure, small profile, light weight and more superior performance.
Description
Technical field
The utility model relates to the nucleic in monitoring field and analyzes identifier, is specifically related to a kind of novel portable gamma spectrometer.
Background technology
Discern, prevent in the work such as radioactive substance illegal transshipment and environmental law enforcement at the attack of terrorism, radioactive nuclide at multiple factors such as nuclear and radiation, need the radioactive kind of nuclide identification instrument energy quick identification, confirm the type of the radiation level and the identification radioactive source of radioactive source quickly and accurately.
At present, gamma radiation Detection Techniques level is all ripe relatively both at home and abroad, has developed a series of environment gamma monitor, gamma spectrometer, portable radiation gauge, megacryst is searched origin system etc., and they are in personal protection, environmental law enforcement, security control, fields such as medical safe all are widely used.
Current portable formula gamma spectrometer mainly is the portable nuclide identification instrument that adopts sodium iodide crystal, or adopt the pured germanium crystal spectrometer of electric refrigeration, the former is six the seventies crystal commonly used, because temperature effect is bigger, so energy spectrometer instability, time has temperature to float phenomenon, and it is stable often to need built-in nucleic to assist.And electric refrigeration pured germanium crystal spectrometer size is bigger, portable inconvenience, furthermore high purity germanium detector is relatively more expensive, is difficult in industry-by-industry and promotes widely.
In recent years, China's economy develops rapidly, cargoes imported and exported increase, port health quarantine core competence is built and the anti-increase of fearing in order to strengthen comprehensively, the reinforcement of environmental law enforcement ability, China's nuclear power cause is with fast development before the year two thousand twenty in addition, and nuclear industry and nuclear power station press for emergent and the radioactivity monitoring ability strengthened.Therefore, to portable energy spectrometer huge needs will be arranged.
At present, research and development along with crystal of new generation, detector based on cesium iodide (CsI) crystal counter is progressively accepted by the client, in addition because the encapsulation of cesium iodide detector is simple, be difficult for deliquescence, be processed into difformity easily, higher relatively to high energy gamma detection efficiency, therefore adopt the upgrading new product that is about to become market based on the portable energy spectrometer of cesium iodide crystal.
In sum, design a kind of nucleic energy spectrometer based on cesium iodide, need the problem of solution for this area badly so that better detection service to be provided.
The utility model content
The purpose of this utility model is to provide a kind of novel portable power spectrum identifier, remedies the defective of other existing energy spectrometer at present, and this apparatus structure is simple, designs small and exquisitely, in light weight, and performance is more superior.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of novel portable gamma spectrometer, described gamma spectrometer comprises gamma detector, photoelectric conversion unit, emitter follower, high-voltage power supply, processing unit, display unit and power supply unit, described gamma detector is connected with described photoelectric conversion unit, and described photoelectric conversion unit is connected with high-voltage power supply with emitter follower respectively, described emitter follower is connected to processing unit, and described processing unit joins with power supply unit and display unit respectively.
In an embodiment of the present utility model, described gamma detector comprises screening can, cesium iodide crystal, reflector layer, insulation course and lucifuge layer, described cesium iodide crystal is placed in the screening can, and described cesium iodide crystal periphery is wrapped up reflector layer, insulation course and lucifuge layer from inside to outside successively.
In an embodiment of the present utility model, described photoelectric conversion unit is the metal photomultiplier.
In an embodiment of the present utility model, described photoelectric conversion unit is a photodiode.
The portable gamma spectrometer that the utility model provides has following characteristics:
(1) substitute the detecting element of sodium iodide as gamma and X ray etc. with cesium iodide crystal, coupling metal photomultiplier makes that as photo-electric conversion element gamma detecting head volume is small and exquisite, is very suitable for doing portable instrument;
(2) portable energy spectrometer that provides of the utility model adopts the digitizing power spectrum, uses the FPGA technology, and whole portable apparatus volume is little, and processing speed is fast, and numeral does not have and piles up;
(3) portable energy spectrometer that provides of the utility model also can adopt photodiode as photo-electric conversion element, if adopt photodiode as photo-electric conversion element, complete machine need not to provide high pressure, has simplified the structure of instrument greatly;
(4) the utility model adopts the CsI crystal as the gamma detecting element, sensitive to the gamma radiation response, but measurement environment ambient radiation level, also can add up radiation dose, and can implement nucleic is analyzed and discerned, this identifier is insensitive to Temperature Influence, for fields such as domestic accident emergency response, border control, customs's detection and nuclear plant safety protection provide new safety guarantee, good society and economic benefit is arranged;
(5) the utility model can provide a kind of brand-new selection for security, personal protection and environs radiation monitoring technical field.
Description of drawings
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a gamma detector in the utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, the novel gamma-ray spectrometry identifier that the utility model provides, it comprises gamma detector 1, photoelectric conversion unit 2, emitter follower 3, high-voltage power supply 4, processing unit 5, display unit 6 and power supply unit 7.
Wherein gamma detector 1 designs separately, the peripheral metal shell that adopts of gamma detector, and front opening, a plastic cement protective sleeve is overlapped in the outside.Gamma detector 1 and photoelectric conversion unit 2 are connected by couplant, and photoelectric conversion unit 2 is connected with high-voltage power supply 4 with emitter follower 3 respectively.Simultaneously, emitter follower 3 is connected to processing unit 5, and display unit 6 all is connected with processing unit 5 with power supply unit 7.
As shown in Figure 2, gamma detector 1 comprises screening can (not shown), cesium iodide crystal 14, reflector layer 13, insulation course 12 and lucifuge layer 11.
Wherein, cesium iodide crystal 14 is placed in the screening can, and its periphery is wrapped up reflector layer 13, insulation course 12 and lucifuge layer 11 from inside to outside successively.
The gamma detector of such scheme adopts the cesium iodide scintillation crystal, and whole detector is placed in the copper shell, also can select for use other crystal as the gamma detector element.
Simultaneously, photoelectric conversion unit 2 is the metal photomultiplier in the utility model.
Moreover photoelectric conversion unit 2 also can be photodiode.If adopt photodiode as photo-electric conversion element, complete machine need not to provide high pressure, has simplified the structure of instrument greatly;
The gamma detector that obtains based on such scheme is the cesium iodide crystal detector, and it adopts the PTFE adhesive tape to seal in the specific implementation, carries out black out at the outer light encapsulant that adopts of PTFE, and integral body does not need metal shell.
By corresponding experiment measuring,
137Under the Cs source, the gamma sensitivity that records is greater than 1000CPS/ (μ Sv.h
-1), the index of above sensitivity all is in forward level in quasi-instrument, and the nucleic analysis is no more than 200 seconds, can carry out spectrum stabilization by natural nucleic.We can say that gamma-ray spectrometry identifier of the present utility model has highly sensitive and portable advantage simultaneously.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. novel portable gamma spectrometer, it is characterized in that described gamma spectrometer comprises gamma detector, photoelectric conversion unit, emitter follower, high-voltage power supply, processing unit, display unit and power supply unit, described gamma detector is connected with described photoelectric conversion unit, described photoelectric conversion unit is connected with high-voltage power supply with emitter follower respectively, and described emitter follower is connected to processing unit, and described processing unit joins with power supply unit and display unit respectively.
2. a kind of novel portable gamma spectrometer according to claim 1, it is characterized in that, described gamma detector comprises screening can, cesium iodide crystal, reflector layer, insulation course and lucifuge layer, described cesium iodide crystal is placed in the screening can, and described cesium iodide crystal periphery is wrapped up reflector layer, insulation course and lucifuge layer from inside to outside successively.
3. a kind of novel portable gamma spectrometer according to claim 1 is characterized in that described photoelectric conversion unit is the metal photomultiplier.
4. a kind of novel portable gamma spectrometer according to claim 1 is characterized in that described photoelectric conversion unit is a photodiode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200925589U CN202013424U (en) | 2011-03-31 | 2011-03-31 | Novel portable gamma energy spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200925589U CN202013424U (en) | 2011-03-31 | 2011-03-31 | Novel portable gamma energy spectrometer |
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| Publication Number | Publication Date |
|---|---|
| CN202013424U true CN202013424U (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200925589U Expired - Fee Related CN202013424U (en) | 2011-03-31 | 2011-03-31 | Novel portable gamma energy spectrometer |
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| CN (1) | CN202013424U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932812A (en) * | 2015-12-30 | 2017-07-07 | 核工业北京地质研究院 | A kind of precession hole drilling type active charcoal bag gamma-ray spectrometry surveys radon method |
| CN113970781A (en) * | 2021-11-26 | 2022-01-25 | 中国船舶重工集团公司第七一九研究所 | Gamma energy spectrum measuring device |
-
2011
- 2011-03-31 CN CN2011200925589U patent/CN202013424U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932812A (en) * | 2015-12-30 | 2017-07-07 | 核工业北京地质研究院 | A kind of precession hole drilling type active charcoal bag gamma-ray spectrometry surveys radon method |
| CN113970781A (en) * | 2021-11-26 | 2022-01-25 | 中国船舶重工集团公司第七一九研究所 | Gamma energy spectrum measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20120331 |