CN101196480B - Radiation imaging detector - Google Patents
Radiation imaging detector Download PDFInfo
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- CN101196480B CN101196480B CN2007103020187A CN200710302018A CN101196480B CN 101196480 B CN101196480 B CN 101196480B CN 2007103020187 A CN2007103020187 A CN 2007103020187A CN 200710302018 A CN200710302018 A CN 200710302018A CN 101196480 B CN101196480 B CN 101196480B
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- photomultiplier
- radiation imaging
- imaging detector
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- bismuth
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Abstract
The invention provides a radiation imaging detector, which comprises a plurality of detecting units which are arrayed in two lines crossing. The detecting units adopts bismuth germinate crystal and opto-electrical multiplier tube coupling method, which comprise a bismuth germinate crystal, a crystal sleeve, an opto-electrical multiplier tube, a sleeve tube, a tube base and a circuit module and an interface underpan. Wherein, the opto-electrical multiplier tube, the tube base and the circuit module are connected. The radiation imaging detector is suitable for the radiation imaging detecting under low-intensity radiation source condition, which can reduce the radiation effect to environment, and reduce the ionizing radiation to the related personnel with good resisting capability to bad weather, the creation cost is low and the invention has good economic effect and social effect.
Description
Technical field
The present invention relates to the radiotechnology application, particularly relate to a kind of radiation imaging detector.
Background technology
At present container examination system or equipment are seen from employed radiation source to be broadly divided into electron accelerator, isotope (cobalt 60 or caesium 137) radiation source two classes.Electron accelerator though had suitable market scale, has complex structure, bulky, shortcomings such as manufacture difficulty is big, the process-cycle is long, cost is higher, key components weak point in serviceable life, conventional maintenance maintenance cost height as radiation source always; And described cobalt 60 or caesium 137 isotope radiation sources are common and the gas detector of the solid probe of photodiode or use high-pressure inert gas is combined, the former diode background noise is bigger, be not suitable for the imaging detection under the condition of low-inensity radiation source, and the sensitivity of latter's gas detector is too low, also is not suitable for the imaging detection under the condition of low-inensity radiation source.
Along with the aggravation step by step of social environmental pollution, people's environmental consciousness is progressively strengthening.The notion of low pollution, sharp environmental protection has been goed deep into every field, and the nuclear radiation tech industry is no exception.U.S. company has developed the container examination system in a kind of low dose radiation source, and what it adopted is the mode of sodium iodide crystal and the combination of square photomultiplier.The advantage of sodium iodide crystal is better with the matching ratio of photomultiplier, and light output is higher, but sodium iodide also has fatal shortcoming, is exactly deliquescence very easily, and the anti-adverse environment poor-performing is not suitable for wet condition such as harbour and uses down.In addition, the cost of square photomultiplier is very high.
Summary of the invention
Defective in view of cost height, anti-environmental performance difference in the above-mentioned technology, fundamental purpose of the present invention is to provide a kind of radiation imaging detector, this detector is applicable to the radiant image detection under the condition of low-inensity radiation source, reduced the detector cost, improve the ability of detector moisture resistance wet environment, and had high detection sensitivity.
For reaching above purpose, a kind of radiation imaging detector provided by the invention, comprise that mainly several probe units form with the relative interlace mode arrangement of biserial, and described probe unit adopts the mode of bismuth-germanium-oxide crystal and photomultiplier coupling, specifically includes bismuth-germanium-oxide crystal, crystal sleeve, photomultiplier, pipe box tube, base and circuit module and interface chassis.Wherein said photomultiplier, base and circuit module are located in the pipe box tube, described photomultiplier is that electrooptical device, base are used to connect photomultiplier and circuit module, circuit module are used to handle the information that photomultiplier obtains, and the pipe box tube plays shading, shielding and protective effect to them; Described bismuth germanium oxide is the radiation scintillation crystal, and appearance has coated the crystal sleeve of shading, shielding and protective effect, is positioned at aforementioned tube sleeve one end and is coupled with photomultiplier; The other end of described pipe box tube is provided with above-mentioned interface chassis, this interface chassis is provided with the data that some interfaces are used for inwardly transmitting power supply, outwards transmit this probe unit and obtained, and is connected by above-mentioned base and circuit module between described photomultiplier and this interface chassis.
Described photomultiplier is preferably round nose window photomultiplier, to reduce cost.
Described bismuth-germanium-oxide crystal is a kind of scintillation material, water white transparency.When X ray, gamma-rays or the heavy charged particle of certain energy enter bismuth-germanium-oxide crystal, send glaucous fluorescence, by record intensity of fluorescence and position, energy and the position that can extrapolate incident X-rays, gamma-rays etc.
Lower in view of the output of the light of bismuth-germanium-oxide crystal, be to realize that the radiant image under the condition of low-inensity radiation source surveys, radiation imaging detector provided by the invention adopts the mode of counting, i.e. number by photomultiplier record incident photon.
In sum, a kind of radiation imaging detector provided by the invention, it adopts bismuth-germanium-oxide crystal and photomultiplier combined, is applicable to that the radiant image under the condition of low-inensity radiation source is surveyed, and can reduce the radiation effect to environment.In addition, described bismuth-germanium-oxide crystal also has good gamma-rays absorptivity and anti-adverse environment ability, has resolving power index preferably, and photomultiplier adopts circular photomultiplier, its cost is about 1/5～1/10 of square photomultiplier, therefore radiation imaging detector provided by the invention is also put forward the ability with high detection sensitivity and anti-extreme climate environment, reduces the detector manufacturing cost, and good economic benefits and social benefit are arranged.
Description of drawings
Fig. 1 is the probe unit schematic perspective view of a kind of radiation imaging detector provided by the invention;
Fig. 2 is the sectional perspective synoptic diagram of a kind of radiation imaging detector provided by the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail, but not as a limitation of the invention.
A kind of radiation imaging detector provided by the invention comprise that mainly several probe units form with the relative interlace mode arrangement of biserial, and described probe unit adopts the mode of bismuth-germanium-oxide crystal and photomultiplier coupling.
As shown in Figure 1, be the schematic perspective view of the probe unit 100 of a kind of radiation imaging detector provided by the invention.This probe unit 100 includes pipe box tube 101, bismuth-germanium-oxide crystal 102, crystal sleeve 103, photomultiplier 104, base and circuit module 105 and interface chassis 106.Wherein said photomultiplier 104, base and circuit module 105 are located in the pipe box tube 101, described bismuth-germanium-oxide crystal 102 appearances coating crystal sleeve 103 is positioned at aforementioned tube sleeve 101 1 ends and is coupled with photomultiplier 104, these bismuth-germanium-oxide crystal 102 upper and lower surfaces are parallel to each other, are parallel to each other with photomultiplier coupling surface and opposite face, two other side then is a cambered surface, and its cambered surface diameter is consistent with the diameter of photomultiplier 104.The other end of described pipe box tube 101 is provided with interface chassis 106, this chassis 106 is provided with some interfaces and is used for outwards transmitting the data that this probe unit 100 is obtained, be provided with a base and circuit module 105 between photomultiplier 104 and the chassis 106, be used to handle the information that photomultiplier 104 is obtained.
As shown in Figure 2, be the sectional perspective synoptic diagram of a kind of radiation imaging detector provided by the invention.Above-mentioned some probe units 100 are the vertically superposed relatively strip array that is arranged in of cross-point with bismuth-germanium-oxide crystal 102 1 ends, and are wherein closely folded mutually between the bismuth-germanium-oxide crystal 102 of each probe unit 100.
Radiation imaging detector provided by the invention is used for the quick through type container examination system in harbour, because the high sensitivity of this detector, can reduce the intensity of radiation source in the container examination system greatly, as the activity of original use is that 300 Curie's co-60 radiation source just can be reduced to below 1 Curie, be original 1/300, significantly reduced the influence of radiation environment.In addition, the speed that radiation imaging detector provided by the invention has passed through when having improved inspection of containers greatly, when checking at the harbour, speed has per hour been mentioned greater than 120 containers by 20 containers per hour, even can reach per hour 200 containers.From the angle that this high-level efficiency detects, further reduced the radiation effect of unit detection again to environment.
Claims (5)
1. radiation imaging detector, comprise the probe unit that several are arranged with the relative interlace mode of biserial, it is characterized in that, described probe unit includes bismuth-germanium-oxide crystal, the crystal sleeve, photomultiplier, the pipe box tube, base and circuit module and interface chassis, described photomultiplier, base and circuit module are located in the pipe box tube, described bismuth-germanium-oxide crystal appearance coats the crystal sleeve, be positioned at an end of pipe box tube and be coupled with photomultiplier, the other end of described pipe box tube is provided with above-mentioned interface chassis, is connected by above-mentioned base and circuit module between described photomultiplier and this interface chassis.
2. a kind of radiation imaging detector according to claim 1, it is characterized in that, described some probe units are the vertically superposed strip array that is arranged in of cross-point with relative bismuth-germanium-oxide crystal one end of biserial, and are wherein closely folded mutually between the bismuth-germanium-oxide crystal of each probe unit.
3. a kind of radiation imaging detector according to claim 1 is characterized in that, described photomultiplier is a round nose window photomultiplier.
4. a kind of radiation imaging detector according to claim 1 is characterized in that, described interface chassis is provided with some interfaces.
5. a kind of radiation imaging detector according to claim 1 is characterized in that, this detector is by the number of photomultiplier record incident photon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103020187A CN101196480B (en) | 2007-12-19 | 2007-12-19 | Radiation imaging detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103020187A CN101196480B (en) | 2007-12-19 | 2007-12-19 | Radiation imaging detector |
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| Publication Number | Publication Date |
|---|---|
| CN101196480A CN101196480A (en) | 2008-06-11 |
| CN101196480B true CN101196480B (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007103020187A Active CN101196480B (en) | 2007-12-19 | 2007-12-19 | Radiation imaging detector |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104375159A (en) * | 2014-12-11 | 2015-02-25 | 天津普达软件技术有限公司 | Probe for core gamma-ray detection |
| CN110231646A (en) * | 2018-03-05 | 2019-09-13 | 无锡通透光电科技有限公司 | A kind of nuclear radiation and metal dual intensity safety inspection door for detecting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5300782A (en) * | 1992-06-26 | 1994-04-05 | General Electric Company | Gamma ray detector for pet scanner |
| CN2217799Y (en) * | 1993-09-01 | 1996-01-17 | 核工业北京地质研究院 | Potassium-uranium-thorium spectrometor |
| CN1249451C (en) * | 2001-09-27 | 2006-04-05 | 日本医事物理株式会社 | Radiation detector |
| CN1284006C (en) * | 2003-06-30 | 2006-11-08 | 株式会社岛津制作所 | Radiation detector and a method of manufacturing the detector |
| CN201145674Y (en) * | 2007-12-19 | 2008-11-05 | 公安部第一研究所 | Radiation imaging detector |
-
2007
- 2007-12-19 CN CN2007103020187A patent/CN101196480B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5300782A (en) * | 1992-06-26 | 1994-04-05 | General Electric Company | Gamma ray detector for pet scanner |
| CN2217799Y (en) * | 1993-09-01 | 1996-01-17 | 核工业北京地质研究院 | Potassium-uranium-thorium spectrometor |
| CN1249451C (en) * | 2001-09-27 | 2006-04-05 | 日本医事物理株式会社 | Radiation detector |
| CN1284006C (en) * | 2003-06-30 | 2006-11-08 | 株式会社岛津制作所 | Radiation detector and a method of manufacturing the detector |
| CN201145674Y (en) * | 2007-12-19 | 2008-11-05 | 公安部第一研究所 | Radiation imaging detector |
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