CN107462589A - Seabed integrated neutron activation analysis system in situ - Google Patents
Seabed integrated neutron activation analysis system in situ Download PDFInfo
- Publication number
- CN107462589A CN107462589A CN201710798939.0A CN201710798939A CN107462589A CN 107462589 A CN107462589 A CN 107462589A CN 201710798939 A CN201710798939 A CN 201710798939A CN 107462589 A CN107462589 A CN 107462589A
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- detector
- neutron
- neutron source
- ray
- source
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Links
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 12
- 238000003947 neutron activation analysis Methods 0.000 title claims abstract description 8
- 239000013049 sediment Substances 0.000 claims abstract description 36
- 230000005251 gamma ray Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000002861 polymer material Substances 0.000 claims abstract description 7
- 230000004913 activation Effects 0.000 claims abstract description 6
- 239000006096 absorbing agent Substances 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 230000002269 spontaneous effect Effects 0.000 claims abstract description 4
- 230000002285 radioactive effect Effects 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000000523 sample Substances 0.000 description 7
- 239000013535 sea water Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910014323 Lanthanum(III) bromide Inorganic materials 0.000 description 2
- 238000002083 X-ray spectrum Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000084 gamma-ray spectrum Methods 0.000 description 2
- 101000905241 Mus musculus Heart- and neural crest derivatives-expressed protein 1 Proteins 0.000 description 1
- 238000000516 activation analysis Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001917 fluorescence detection Methods 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 238000000155 in situ X-ray diffraction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- XKUYOJZZLGFZTC-UHFFFAOYSA-K lanthanum(iii) bromide Chemical compound Br[La](Br)Br XKUYOJZZLGFZTC-UHFFFAOYSA-K 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/005—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using neutrons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/07—Investigating materials by wave or particle radiation secondary emission
- G01N2223/074—Investigating materials by wave or particle radiation secondary emission activation analysis
- G01N2223/0745—Investigating materials by wave or particle radiation secondary emission activation analysis neutron-gamma activation analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/635—Specific applications or type of materials fluids, granulates
Abstract
The invention discloses a kind of seabed integrated neutron activation analysis system in situ, including detector assembly, triumphant wiring cable and control system, the detector assembly is connected by triumphant wiring cable with control system, the detector assembly includes body, is arranged on intrinsic neutron source, detector, and solid is made using C, H high polymer material in division board, the body made of neutron absorber material between neutron source and detector；The neutron source is irradiated for given-ioff neutron to bottom sediment, and bottom sediment is produced prompt gamma ray after neutron activation, and the neutron source outer wall is enclosed with the lead layer shielded to the spontaneous gamma-rays of neutron source；The division board is used to absorb the neutron that neutron source is transmitted directly on detector；The detector is used to collect the wink hair Characteristic γ ray, and the data detected are sent into control system and analyzed and processed.The present invention will not increase the background of detector, and it is simple in construction, intensity is high, without setting detecting window, small, service life length is damaged to detector.
Description
Technical field
The present invention relates to a kind of neutron detection device, more particularly to a kind of seabed integrated neutron activation analysis system in situ
System.
Background technology
At present, bottom sediment is detected, is generally divided into 2 kinds of methods.First method is directly to sea-bottom deposit
Thing is sampled, and then aboard ship either land carries out physics or chemical analysis obtains containing for various bottom sediment elements
Amount.Second method is that in situ and measurement in real time is carried out to bottom sediment, and qualitative and quantitative point is then carried out to thalassoxene element
Analysis.But first method the step such as need to be sampled sample, process or transport, it is necessary to the time spent it is very long and
These steps are pretty troublesome.Therefore the detection to bottom sediment now slowly turns to the 2nd kind of method.Second method avoids completely
To steps such as bottom sediment sample, processing, directly bottom sediment can be carried out during surveying vessel navigation
Measurement in real time, the content and distribution diagram of element of bottom sediment element can be got in real time.
In the second approach, present use must be X-fluorescence Detection Techniques, referring to Fig. 1, that is, utilize x-ray bombardment seabed
Deposit, bottom sediment is produced characteristic X-ray, then detected by detector, qualitatively and quantitatively analyzed.But
Because X ray penetration capacity is weak, cause to be easy to produce bottom sediment by Absorption by Sea Water so as to which bottom sediment can not be irradiated
Characteristic X-ray or because caused bottom sediment characteristic X-ray can not be detected after Absorption by Sea Water by detector, therefore
The content for the bottom sediment element for causing to measure has certain error.In addition, being also due to that X ray penetration capacity is weak, need
Will be in seabed inserting tube（X fluorescent probes system and various instruments are protected in seabed）Middle setting detecting window, to weaken
Absorption of the inserting tube to X ray.But although detecting window can weaken the absorption to X ray, still there is a certain amount of X ray quilt
Sponge, and detecting window is more fragile, it is easy to damaged by bottom sediment, so as to cause the infringement of instrument.Further, since
X-ray tube produces the X ray for being, this can increase the background for the X-ray spectrum that detector detects, so as to bottom sediment element
Content measurement have a certain impact.
The content of the invention
The purpose of the present invention is that providing one kind solves the above problems, and will not increase the background of detector, and structure letter
Single, intensity height, without setting detecting window, small, the seabed integrated neutron activation point in situ of service life length is damaged to detector
Analysis system.
To achieve these goals, the technical solution adopted by the present invention is such：A kind of seabed integrated neutron in situ
Activation analysis system, including detector assembly, triumphant wiring cable and control system, the detector assembly pass through triumphant wiring cable and control
System connection processed, the detector assembly include body, are arranged on intrinsic neutron source, detector, and positioned at neutron source
Between detector made of neutron absorber material division board；
Solid is made using C, H high polymer material in the body；
The neutron source is irradiated for launching radioactive source to bottom sediment, and bottom sediment is produced wink after neutron activation
Gamma-rays is sent out, and the neutron source outer wall is enclosed with the lead layer shielded to the spontaneous gamma-rays of neutron source；
The division board is used to absorb the neutron that neutron source is transmitted on detector；
The detector is used to collect the wink hair Characteristic γ ray, and the data detected are sent into control system；
The obturator of adjustment center of gravity is additionally provided with body, the obturator is used for the integral level for adjusting detector assembly.
As preferred：The detector is scintillator or semiconductor detector, and the obturator uses Pb or Cu, in described
Component is radioactive isotope neutron source, and the material of the division board is10B。
In fact, selection is not limited to above-mentioned material, the detector is scintillator or semiconductor detector, such as NaI
（Tl）、LaBr3Deng, the obturator using high-density matters such as Pb or Cu, for adjusting the center of gravity of body, the neutron source is
Radioactive isotope neutron source, such as241Am-Be sources,24Na-Be sources etc., its effect is for producing neutron, then to seabed
Deposit is irradiated, and bottom sediment is produced prompt gamma ray after neutron activation；The material of the division board is inhaled for neutron
The big material in section is received, such as10B, its effect is for absorbing neutron, avoiding damage of the neutron to detector.
As preferred：The body is horizontally disposed cylinder or cuboid.
Compared with prior art, the advantage of the invention is that：The present invention produces neutron using neutron source, and irradiation seabed sinks
Product thing is so as to produce Characteristic γ ray, because neutron and gamma-ray penetration capacity ratio X ray are strong, therefore when design not
Need special detecting window.Overall construction intensity is high, can more bear the pressure at deep-sea, can realize and deep seafloor is detected.
In addition, seawater can also degraded neutron, so as to increase the reaction cross-section of neutron and bottom sediment, and neutron due to
There are the stop of high-performance neutron absorber material, therefore the infringement very little to detector, the service life of the present invention can be improved, due to
Neutron does not interfere with detector, so the background for the gamma ray spectrum that detector detects will not be increased.
Solid is made using C, H high polymer material in body of the present invention, can either be thermal neutron moderation of neutrons, moreover it is possible to right
The effect that probe portion is protected and supported, therefore the probe portion in device need not be protected using seabed inserting tube
Shield.
In addition, the part of detection is all embedded in body made of C, H macromolecule by the present invention, forms integration and set
Meter, can very easily be moved.
Brief description of the drawings
Fig. 1 is the structural representation of seabed in-situ investigation device in the prior art；
Fig. 2 is the structural representation of the present invention.
In figure：1st, bottom sediment；2nd, X-ray tube；3rd, power-supply controller of electric；4th, signal processing circuit；5th, detecting window；6th, excite
Detection device；7th, X-ray detector；8th, triumphant wiring cable；9th, obturator；10th, body；11st, neutron source；12nd, detector；13rd, every
From plate.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment 1：Referring to Fig. 1, in the prior art, seabed in situ X-ray diffraction fluorescence measurement sample is continued using this structure more
Product excite and detection schematic diagram.As seen from the figure, generally hollow excitation detection gear 6, inside set X-ray tube 2 and X ray
Detector 7, bottom open up detecting window 5, and the angle of X-ray tube 2 and horizontal plane is α, and the angle of X-ray detector 7 and horizontal plane is
β, X-ray tube 2 connect power-supply controller of electric 3, and X-ray detector 7 connects signal processing circuit 4；The detection method of the present apparatus is：Utilize
X-ray bombardment bottom sediment 1, bottom sediment 1 is produced characteristic X-ray, then detected, entering by X-ray detector 7
Row is qualitatively and quantitatively analyzed.But because X ray penetration capacity is weak, cause to be easy to by Absorption by Sea Water so as to which seabed can not be irradiated
Deposit 1 produces the characteristic X-ray of bottom sediment 1 or because the caused characteristic X-ray of bottom sediment 1 is by after Absorption by Sea Water
It can not be detected by X-ray detector 7, therefore the content for the element of bottom sediment 1 for causing to measure has certain error.This
Outside, also it is due to that X ray penetration capacity is weak, it is necessary in seabed inserting tube（To the system of x fluorescent X-rays detector 7 and respectively in seabed
Kind instrument is protected）Middle setting detecting window 5, to weaken absorption of the inserting tube to X ray.But although detecting window 5 can weaken to X
The absorption of ray, but still there is a certain amount of X ray to be predominantly absorbed, and detecting window 5 compare it is fragile, it is easy to sunk by seabed
Product thing 1 damages, so as to cause the infringement of instrument.Further, since X-ray tube produces the X ray for being, this can increase X-ray detection
The background for the X-ray spectrum that device 7 detects, so as to be had a certain impact to the content measurement of the element of bottom sediment 1.
Referring to Fig. 2, scheme that the present invention uses for：A kind of seabed integrated neutron activation analysis system in situ, including visit
The component of device 12, triumphant wiring cable 8 and control system, the component of detector 12 is surveyed to be connected with control system by triumphant wiring cable 8,
The component of detector 12 includes body 10, the neutron source 11 being arranged in body 10, detector 12, and positioned at neutron
Between source 11 and detector 12 made of neutron absorber material division board 13；
Solid is made using C, H high polymer material in the body 10；
The neutron source 11 is irradiated for launching radioactive source to bottom sediment 1, and bottom sediment 1 is produced after neutron activation
Raw prompt gamma ray, and the outer wall of the neutron source 11 is enclosed with the lead layer shielded to 11 spontaneous gamma-rays of neutron source；
The division board 13 is used to absorb the neutron that neutron source 11 is transmitted on detector 12；
The detector 12 is used to collect the wink hair Characteristic γ ray, and the data detected are sent into control system；
The obturator 9 of adjustment center of gravity is additionally provided with body 10, the obturator 9 is used for the overall water for adjusting the component of detector 12
It is flat.
Wherein, the detector 12 is scintillator or semiconductor detector 12, such as NaI（Tl）, LaBr3 etc., the filling
Body 9 uses Pb or Cu, such as241Am-Be sources,24Na-Be sources etc., the neutron source 11 is radioactive isotope neutron source 11, described
The material of division board 13 is10B, the body 10 are horizontally disposed cylinder or cuboid.
Detection method of the present invention is that the present invention is carried to the position for needing to detect using ship, will by triumphant wiring cable 8
The component of detector 12 is placed on seabed, is contacted with bottom sediment 1, now opens the component of detector 12 and is detected.
Neutron source 11 launches radioactive source and bottom sediment 1 is excited, and produces prompt gamma ray, and detector 12 detects
Arrive, the detector 12 collects wink hair Characteristic γ ray, and by the data detected be sent to control system carry out it is qualitative
Quantitative analysis.
Body 10 made of C, H high polymer material during the present invention uses, can not only be slow by fast neutron caused by neutron source 11
It is melted into thermal neutron, moreover it is possible to the effect protected and supported to probe portion, therefore seabed inserting tube is not needed to the spy in device
Survey part to be protected, the outer wall of neutron source 11 coats the lead layer that a pair of neutrons carry out slowing down, body made of C, H high polymer material
10 and lead layer, the two is all can be by Moderation of the fast neutrons caused by neutron source 11 into thermal neutron, increase neutron and bottom sediment 1
Reaction cross-section.So body 10 not only acts as the effect of shell protection support, the effect of degraded neutron is also taken into account.
The division board 13 is used to absorb the neutron that neutron source 11 is transmitted on detector 12, therefore to the broken of detector 12
Bad very little, and neutron will not increase the background for the gamma ray spectrum that detector 12 detects.Adjustment center of gravity is additionally provided with body 10
Obturator 9, the obturator 9 is used for the integral level for adjusting the component of detector 12, and is advantageous to entirety of the invention in the seawater
Sink, be easy to detect.
The present invention without detecting window 5, and seawater can degraded neutron, so as to increase the reaction cross-section with bottom sediment 1,
Detector 12 is hardly influenceed by neutron source 11, adds service life, and probe portion is all embedded in body 10, forms one
Bodyization designs, and can very easily move, bottom sediment 1 is detected.
Claims (3)
1. a kind of seabed integrated neutron activation analysis system in situ, including detector assembly, triumphant wiring cable and control system, institute
Detector assembly is stated to be connected with control system by triumphant wiring cable, it is characterised in that：
The detector assembly includes body, is arranged on intrinsic neutron source, detector, and positioned at neutron source and detector
Between made of neutron absorber material division board；
Solid is made using C, H high polymer material in the body；
The neutron source is irradiated for launching radioactive source to bottom sediment, and bottom sediment is produced wink after neutron activation
Gamma-rays is sent out, and the neutron source outer wall is enclosed with the lead layer shielded to the spontaneous gamma-rays of neutron source；
The division board is used to absorb the neutron that neutron source is transmitted on detector；
The detector is used to collect the wink hair Characteristic γ ray, and the data detected are sent into control system；
The obturator of adjustment center of gravity is additionally provided with body, the obturator is used for the integral level for adjusting detector assembly.
2. seabed according to claim 1 integrated neutron activation analysis system in situ, it is characterised in that：The detector
For scintillator or semiconductor detector, the obturator uses Pb or Cu, and the neutron source is radioactive isotope neutron source, institute
The material for stating division board is10B。
3. seabed according to claim 1 integrated neutron activation analysis system in situ, it is characterised in that：The body is
Horizontally disposed cylinder or cuboid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798939.0A CN107462589A (en) | 2017-09-07 | 2017-09-07 | Seabed integrated neutron activation analysis system in situ |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798939.0A CN107462589A (en) | 2017-09-07 | 2017-09-07 | Seabed integrated neutron activation analysis system in situ |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107462589A true CN107462589A (en) | 2017-12-12 |
Family
ID=60551190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710798939.0A Pending CN107462589A (en) | 2017-09-07 | 2017-09-07 | Seabed integrated neutron activation analysis system in situ |
Country Status (1)
| Country | Link |
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| CN (1) | CN107462589A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324430A (en) * | 2022-03-07 | 2022-04-12 | 合肥金星智控科技股份有限公司 | Detection device based on neutron activation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3781556A (en) * | 1972-09-08 | 1973-12-25 | Atomic Energy Commission | Neutron activation analysis system |
| CN105910598A (en) * | 2016-04-05 | 2016-08-31 | 广东工业大学 | In-situ layered acoustic measuring sampler detection system |
| CN106841311A (en) * | 2017-01-18 | 2017-06-13 | 青岛海洋地质研究所 | A kind of preventing seabed base multiple spot original position long-term observation system |
| CN106970428A (en) * | 2017-05-02 | 2017-07-21 | 成都理工大学 | Seabed inserting tube |
| CN207148004U (en) * | 2017-09-07 | 2018-03-27 | 成都理工大学 | Seabed integrated neutron activation analysis system in situ |
| CN111257413A (en) * | 2020-02-17 | 2020-06-09 | 中国海洋大学 | Three-dimensional in-situ real-time submarine sediment acoustic section scanning device |
-
2017
- 2017-09-07 CN CN201710798939.0A patent/CN107462589A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3781556A (en) * | 1972-09-08 | 1973-12-25 | Atomic Energy Commission | Neutron activation analysis system |
| CN105910598A (en) * | 2016-04-05 | 2016-08-31 | 广东工业大学 | In-situ layered acoustic measuring sampler detection system |
| CN106841311A (en) * | 2017-01-18 | 2017-06-13 | 青岛海洋地质研究所 | A kind of preventing seabed base multiple spot original position long-term observation system |
| CN106970428A (en) * | 2017-05-02 | 2017-07-21 | 成都理工大学 | Seabed inserting tube |
| CN207148004U (en) * | 2017-09-07 | 2018-03-27 | 成都理工大学 | Seabed integrated neutron activation analysis system in situ |
| CN111257413A (en) * | 2020-02-17 | 2020-06-09 | 中国海洋大学 | Three-dimensional in-situ real-time submarine sediment acoustic section scanning device |
Non-Patent Citations (4)
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|---|
| 徐阳等: "海底原位PGNAA探测含水率对中子分布影响研究", 《核电子学与探测技术》 * |
| 戴振麟等: "几大物理学原理在几类仪器中的应用", 《安徽师范大学学报(自然科学版)》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324430A (en) * | 2022-03-07 | 2022-04-12 | 合肥金星智控科技股份有限公司 | Detection device based on neutron activation |
| CN114324430B (en) * | 2022-03-07 | 2022-06-17 | 合肥金星智控科技股份有限公司 | Detection device based on neutron activation |
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Application publication date: 20171212 |