CN202256719U - Elemental capture gamma energy spectrum measurement device based on Am-Be neutron source - Google Patents
Elemental capture gamma energy spectrum measurement device based on Am-Be neutron source Download PDFInfo
- Publication number
- CN202256719U CN202256719U CN2011203891508U CN201120389150U CN202256719U CN 202256719 U CN202256719 U CN 202256719U CN 2011203891508 U CN2011203891508 U CN 2011203891508U CN 201120389150 U CN201120389150 U CN 201120389150U CN 202256719 U CN202256719 U CN 202256719U
- Authority
- CN
- China
- Prior art keywords
- neutron source
- detector
- slowing down
- captured
- shield
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The utility model provides an elemental capture gamma energy spectrum measurement device based on an Am-Be neutron source. The elemental capture gamma energy spectrum measurement device comprises a laboratory, a slowing-down shielding body, the neutron source, a sample table, a detector, a data acquisition processing card and a data analysis terminal, wherein the neutron source is put in the slowing-down shielding body and used for producing a neutron ray; the sample table is arranged at a ray outlet of the slowing-down shielding body and used for holding a sample to be measured; the detector is arranged on the side of the sample table; the data acquisition processing card is connected with the detector through a signal line and used for acquiring and processing data acquired by the detector; and the data analysis terminal is connected with the data acquisition processing card and used for analyzing the data processed by the data acquisition processing card. The type of the neutron source and the size parameter of the detector in the measurement device are so close to parameters of an actual underground instrument of elemental capture spectroscopy (ECS) that the accuracy and the precision of measurement of each elemental capture gamma energy spectrum can be guaranteed.
Description
Technical field
The utility model relates to the Nuclear Logging Technique field, and particularly a kind of element based on Am-Be neutron source is captured the gamma spectrometry device.
Background technology
Nuclear Logging Technique is one of most advanced and sophisticated logging technology that the needs of Nuclear Logging Technique development is developed rapidly along with the development of contemporary nuclear technology and oil, coal, geological and mineral etc.Along with RENGONGSHE line source technology, sensor technology, measuring technique, the information processing technology and development of computer; Nuclear Logging Technique is also in continuous development; Element capture spectra well logging (Flemental Capture Spectroscopy particularly; Be abbreviated as ECS) appearance; For solving the identification of complicated reservoirs lithology, computing rock mineral skeletal density, confirming that problems such as reservoir physical parameter, research sedimentary environment and stratum contrast provide a kind of new approach of dealing with problems, and have a good application prospect.
This century; France Schlumberger company has released novel stratum element logging instrumentation ECS to Chinese market; This instrument utilizes collision of atomic nucleus generation inelastic scattering and the captive principle of thermal neutron in fast neutron and the stratum; Obtain the relative percentage composition of main petrogenic element (Si, Ca, Fe, Al, S, Ti, Cl, Cr, Gd etc.) in the stratum through spectrum unscrambling and oxides closure model, and use the mineral content on method quantitative solving stratum such as cluster analysis, factorial analysis.
Element capture spectra well logging interpretation comprise 3 core procedures: 1) utilize each element standard spectrum over the ground layer original measure spectrum and carry out scale, obtain the yield of various elements through spectrum unscrambling; 2) based on " oxygen closure " principle the yield of element is converted into each element wt percentage composition of forming formation rock; 3) through setting up the transformational relation between stratum element and the stratum mineral, the weight percentage of element is converted into the weight percentage of various mineral, realize lithology identification and rock skeleton parameter computation purpose.Gordian technique difficult point wherein is how under laboratory simulation well logging apparatus condition, accurately to obtain various element standard prisoner gamma spectras; And then layer original measurement spectrum is carried out scale over the ground, and this is the basic place of setting up element capture spectra well logging complete process interpretation procedure.Through literature survey, we are found to so far, still do not have the various common rock forming mineral public reported that its standard is captured the gamma spectrometry result under the well logging condition in the world.Capture gamma spectra although some companies have showed such as the standard of elements such as silicon, calcium and titanium on some non-public occasion and publicity materials, find that through comparative study the normal data that provides in these spectral lines and the International Atomic Energy Agency's nuclear data depositary differs bigger.At home; Though the measurement scheme and the test method of a few kinds of elements (like silicon, calcium, iron) have been set up in research in the past in the laboratory; But whole shortage systematicness, thereby restricted element capture spectra well logging logging technology to a great extent in Development in China and application.Simultaneously, more crucial is, instrument parameter differs far away under the neutron source type that was in the past adopted in the test unit and the dimensional parameters of detector and the element capture spectra well logging real well, is difficult to guarantee that each element captures the accuracy and the precision of gamma spectrometry.Therefore, set up can each element of systematic survey to capture gamma spectra and make to the full extent that instrument parameter is consistent under experimental provision parameter and the real well and seem particularly important and urgent once cover.
Summary of the invention
The fundamental purpose of the utility model is to solve the problem that exists in the prior art; Provide a kind of element to capture the gamma spectrometry device, can accurately measure the standard of elements such as comprising silicon, calcium, iron, potassium, sodium, sulphur, titanium, gadolinium and capture gamma spectra based on Am-Be neutron source.
The purpose of the utility model is achieved through following technical proposals:
A kind of element based on Am-Be neutron source is captured the gamma spectrometry device, it is characterized in that, comprising: laboratory, slowing down shield, neutron source, sample stage, detector, data acquisition process card, data analysis terminal; Said slowing down shield, neutron source, sample stage, detector are arranged in the laboratory;
Said neutron source is placed in the slowing down shield, in order to produce the neutron radiation line; This slowing down shield is in order to the fast neutron of slowing down Am-Be neutron source emission;
Said sample stage is arranged on the ray exit of slowing down shield, in order to place sample to be measured;
Said detector is arranged on this sample stage side, in order to wink to send out gamma-ray spectrometry;
Said data acquisition process cartoon is crossed signal wire and is linked to each other with detector, in order to collect and to handle the data that detector is gathered;
Said data analysis terminal links to each other with the data acquisition process card, analyzes in order to the data after the data acquisition and processing card is handled.
Said neutron source adopts Am-Be neutron source.
Said detector adopts the BGO detector.
In the laboratory, also be provided with a paraffin fender wall, in order to isolate radioactive ray; Said data acquisition process card is arranged in the said laboratory, at the rear side of said paraffin fender wall, receives the insulation blocking of paraffin fender wall.
Said slowing down shield is sandwich construction, and its center is a perspex bar; Front end at this perspex bar is provided with said neutron source; At the skin of this perspex bar around a polyethylene layer is arranged; At the skin of this polyethylene layer around a boracic paraffin layer is arranged; Be wrapped with steel plate at this boracic paraffin layer; In the ray exit of slowing down shield, also be provided with Al slowing down layer with organic glass nose relative position; In the outside of slowing down shield, also be provided with the lead brick shield with the corresponding position of said detector.
Adopt movable design between said perspex bar and the polyethylene layer.
Said polyethylene layer is cylindrical, and said boracic paraffin layer is square.
The cross section of said lead brick shield is a triangle; Said detector is positioned at the summit side of this section triangle.
Through the utility model embodiment, instrument parameter is very approaching under the neutron source type that adopts in this measurement mechanism and the dimensional parameters of detector and the ECS real well, can guarantee that each element captures the accuracy and the precision of gamma spectrometry.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, does not constitute the qualification to the utility model.In the accompanying drawings:
Fig. 1 captures the system architecture synoptic diagram of gamma spectrometry device for this element based on Am-Be neutron source;
Fig. 2 is the structural representation of slowing down shield.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is explained further details below in conjunction with embodiment and accompanying drawing.At this, exemplary embodiment of the utility model and explanation thereof are used to explain the utility model, but not as the qualification to the utility model.
Fig. 1 captures the system architecture synoptic diagram of gamma spectrometry device for this element based on Am-Be neutron source.As shown in the figure, this measurement mechanism comprises: laboratory 1, slowing down shield 2, neutron source 3, sample stage 4, detector 5, data acquisition process card 6, data analysis terminal 7.Said slowing down shield 2, neutron source 3, sample stage 4, detector 5 are arranged in the laboratory 1.
Said neutron source 3 is placed in the slowing down shield 2, in order to produce the neutron radiation line.This slowing down shield 2, in order to the fast neutron of slowing down Am-Be neutron source emission and reduce as much as possible to the staff neutron, γ irradiation dose.
Said sample stage 4 is arranged on the ray exit of slowing down shield 2, in order to place sample to be measured.
Said detector 5 is arranged on this sample stage 4 sides, in order to wink to send out gamma-ray spectrometry.
Said data acquisition process card 6 links to each other with detector 5 through signal wire, in order to collect and to handle the data that detector is gathered.
Said data analysis terminal 7 links to each other with data acquisition process card 6, analyzes in order to the data after data acquisition and processing card 6 is handled.
Wherein, said neutron source 3 adopts Am-Be neutron source, and said detector 5 adopts the BGO detector (promptly to adopt Bi
4Ge
3O
12The detector that material is surveyed).Like this, instrument parameter is very approaching under the neutron source type that is adopted in this measurement mechanism and the dimensional parameters of detector and the ECS real well, can guarantee that each element captures the accuracy and the precision of gamma spectrometry.
In addition, said data acquisition process card 6 also can be set in the said laboratory 1.Simultaneously, as shown in Figure 1, in laboratory 1, also be provided with a paraffin fender wall 9, in order to isolate radioactive ray.This data acquisition process card 6 is arranged on the rear side of paraffin fender wall 9, receives the insulation blocking of paraffin fender wall.
Fig. 2 is the structural representation of slowing down shield.As shown in the figure, this slowing down shield 2 is sandwich construction, and its center is a perspex bar 11.Front end at this perspex bar 11 is provided with said neutron source 3.At the skin of this perspex bar 11 around a polyethylene layer 12 is arranged.At the skin of this polyethylene layer 12 again around a boracic paraffin layer 13 is arranged.Be wrapped with steel plate 14 at this boracic paraffin layer 13.In the ray exit of slowing down shield 2, also be provided with Al slowing down layer 16 with perspex bar 11 front end relative positions.In the outside of slowing down shield 2, also be provided with lead brick shield 15 with said detector 5 corresponding positions, not disturbed by the ray of neutron source emission with protection detector 5.
Wherein, the experimenter adopts movable design to the adjusting of neutron source position and to from the purpose to experimenter's protection between said perspex bar 11 and the polyethylene layer 12 for ease.Like this, the experimenter may stand in the rear side of slowing down shield 2, regulates the position that is positioned at front end neutron source 3 through moving perspex bar 11, neutron source is pushed into and the highest position of sample atoms nuclear generation effect thermal neutron flux.
Said polyethylene layer 12 is cylindrical, and said boracic paraffin layer 13 is square.
In addition, in order to save material and the convenient position of regulating detector 5, the cross section of said lead brick shield 15 is designed to triangle.Detector 5 is positioned at the summit side of this section triangle.
The element based on Am-Be neutron source based on said structure is captured the gamma spectrometry device; Before measuring beginning; Neutron source is placed in the slowing down shield; Place behind the sample through moving the position of perspex bar in the slowing down shield and can regulate and be placed on the position of organic glass nose neutron source, neutron source is pushed into and the highest position of sample atoms nuclear generation effect thermal neutron flux apart from sample stage.The experimenter laboratory that speeds away subsequently, the operational data analysis terminal begins to measure the gamma spectra that testing sample is captured thermal neutron.After measuring a period of time, the experimenter gets into the laboratory and returns neutron source, takes out the sample in the sample stage, the sample stage of sky is put back to same position repeat the background of step measurement just now gamma spectra.After measurement finishes, capture gamma spectra through the standard that this background gamma spectra of analysis of spectrum software deduction can obtain testing sample.
In sum, the utility model has designed a kind of element based on Am-Be neutron source and has captured the gamma spectrometry device, can accurately measure the standard of elements such as comprising silicon, calcium, iron, potassium, sodium, sulphur, titanium, gadolinium and capture gamma spectra.Those skilled in the art's any not creative transformation of doing under this design philosophy all should be regarded as within the protection domain of the utility model.
Claims (8)
1. the element based on Am-Be neutron source is captured the gamma spectrometry device, it is characterized in that, comprising: laboratory, slowing down shield, neutron source, sample stage, detector, data acquisition process card, data analysis terminal; Said slowing down shield, neutron source, sample stage, detector are arranged in the laboratory;
Said neutron source is placed in the slowing down shield, in order to produce the neutron radiation line; This slowing down shield is in order to the fast neutron of slowing down Am-Be neutron source emission;
Said sample stage is arranged on the ray exit of slowing down shield, in order to place sample to be measured;
Said detector is arranged on this sample stage side, wink sends out gamma-ray spectrometry in order to survey;
Said data acquisition process cartoon is crossed signal wire and is linked to each other with detector, in order to collect and to handle the data that detector is gathered;
Said data analysis terminal links to each other with the data acquisition process card, analyzes in order to the data after the data acquisition and processing card is handled.
2. the element based on Am-Be neutron source as claimed in claim 1 is captured the gamma spectrometry device, it is characterized in that: said neutron source adopts Am-Be neutron source.
3. the element based on Am-Be neutron source as claimed in claim 1 is captured the gamma spectrometry device, it is characterized in that: said detector adopts the BGO detector.
4. the element based on Am-Be neutron source as claimed in claim 1 is captured the gamma spectrometry device, it is characterized in that: in the laboratory, also be provided with a paraffin fender wall, in order to isolate radioactive ray; Said data acquisition process card is arranged in the said laboratory, at the rear side of said paraffin fender wall, receives the insulation blocking of paraffin fender wall.
5. the element based on Am-Be neutron source as claimed in claim 1 is captured the gamma spectrometry device, it is characterized in that: said slowing down shield is sandwich construction, and its center is a perspex bar; Front end at this perspex bar is provided with said neutron source; At the skin of this perspex bar around a polyethylene layer is arranged; At the skin of this polyethylene layer around a boracic paraffin layer is arranged; Be wrapped with steel plate at this boracic paraffin layer; In the ray exit of slowing down shield, also be provided with Al slowing down layer with organic glass nose relative position; In the outside of slowing down shield, also be provided with the lead brick shield with the corresponding position of said detector.
6. the element based on Am-Be neutron source as claimed in claim 5 is captured the gamma spectrometry device, it is characterized in that: adopt movable design between said perspex bar and the polyethylene layer.
7. the element based on Am-Be neutron source as claimed in claim 5 is captured the gamma spectrometry device, it is characterized in that: said polyethylene layer is cylindrical, and said boracic paraffin layer is square.
8. the element based on Am-Be neutron source as claimed in claim 5 is captured the gamma spectrometry device, it is characterized in that: the cross section of said lead brick shield is a triangle; Said detector is positioned at the summit side of this section triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203891508U CN202256719U (en) | 2011-10-13 | 2011-10-13 | Elemental capture gamma energy spectrum measurement device based on Am-Be neutron source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203891508U CN202256719U (en) | 2011-10-13 | 2011-10-13 | Elemental capture gamma energy spectrum measurement device based on Am-Be neutron source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256719U true CN202256719U (en) | 2012-05-30 |
Family
ID=46117938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203891508U Expired - Fee Related CN202256719U (en) | 2011-10-13 | 2011-10-13 | Elemental capture gamma energy spectrum measurement device based on Am-Be neutron source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202256719U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093343A (en) * | 2015-08-06 | 2015-11-25 | 中国石油天然气股份有限公司 | Formation element capture gamma-ray spectra measurement method and device |
| CN108457644A (en) * | 2017-12-26 | 2018-08-28 | 中国石油天然气股份有限公司 | A kind of the gamma spectra Spectra Unfolding Methods and device of the well logging of element capture spectra |
| CN111399028A (en) * | 2020-03-19 | 2020-07-10 | 哈尔滨工程大学 | Neutron terminal of multipurpose |
-
2011
- 2011-10-13 CN CN2011203891508U patent/CN202256719U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093343A (en) * | 2015-08-06 | 2015-11-25 | 中国石油天然气股份有限公司 | Formation element capture gamma-ray spectra measurement method and device |
| WO2017020857A1 (en) * | 2015-08-06 | 2017-02-09 | 中国石油天然气股份有限公司 | Formation elemental capture gamma ray spectrum |
| CN105093343B (en) * | 2015-08-06 | 2018-04-06 | 中国石油天然气股份有限公司 | A kind of measurement apparatus of stratum element capture gamma spectra |
| US10401311B2 (en) | 2015-08-06 | 2019-09-03 | Petrochina Company Limited | Method and device for measuring formation elemental capture gamma ray spectra |
| CN108457644A (en) * | 2017-12-26 | 2018-08-28 | 中国石油天然气股份有限公司 | A kind of the gamma spectra Spectra Unfolding Methods and device of the well logging of element capture spectra |
| CN108457644B (en) * | 2017-12-26 | 2020-04-10 | 中国石油天然气股份有限公司 | Gamma-ray energy spectrum unscrambling method and device for element capture energy spectrum logging |
| US11313223B2 (en) | 2017-12-26 | 2022-04-26 | Petrochina Company Limited | Gamma ray spectrum unfolding method for elemental capture spectroscopy logging and device therefor |
| CN111399028A (en) * | 2020-03-19 | 2020-07-10 | 哈尔滨工程大学 | Neutron terminal of multipurpose |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10401311B2 (en) | Method and device for measuring formation elemental capture gamma ray spectra | |
| Suresh et al. | A relationship between the natural radioactivity and mineralogical composition of the Ponnaiyar river sediments, India | |
| CN107505661B (en) | A kind of three detector elements well logging apparatus of controllable neutron and method | |
| Lindstrom | Prompt-gamma activation analysis | |
| CN104297810B (en) | The acquisition methods of net inelastic scattering Gamma-ray spectroscopy in a kind of stratum element well logging | |
| El-Taher | Rare earth elements content in geological samples from eastern desert, Egypt, determined by instrumental neutron activation analysis | |
| CN103696765B (en) | Double LaBr based on controllable neutron source3detector elements spectrometer tool and logging method | |
| CN107229080A (en) | A kind of acquisition methods of geochemical well logging neutron absorption gamma spectra | |
| CN202256719U (en) | Elemental capture gamma energy spectrum measurement device based on Am-Be neutron source | |
| Hult et al. | Recent developments in ultra low-level γ-ray spectrometry at IRMM | |
| Wu et al. | Standard spectrum measurement and simulation of elemental capture spectroscopy log | |
| Zhang et al. | Improved formation density measurement using controllable DD neutron source and its lithological correction for porosity prediction | |
| Al-Abdullah et al. | Sulfur analysis in bulk samples using a DD portable neutron generator based PGNAA setup | |
| Evans et al. | In situ elemental analysis using neutron-capture gamma-ray spectroscopy | |
| Harsányi et al. | Assessment of neutron-induced activation of irradiated samples in a research reactor | |
| Firestone et al. | Database of prompt gamma rays from slow neutron capture for elemental analysis | |
| Petrovic et al. | Scintillators for PGNAA in mineral exploration | |
| Cai et al. | Design of a DT neutron source based PGNAA facility for element determination in aqueous solution | |
| Wu et al. | Calculating standard captured γ spectra of formation elements | |
| Blyth et al. | An apparatus for studying spallation neutrons in the Aberdeen Tunnel laboratory | |
| He et al. | Study on the interpretation method of formation-elements logging | |
| Zhang et al. | A hybrid method on sourceless sensitivity calculation for airborne gamma-ray spectrometer | |
| Walencik-Łata et al. | Characteristics of Natural Background Radiation in the Lubin Mine, Poland | |
| Zhang et al. | A research on the effects of formation elements on the spatial distribution of DD induced γ-ray source | |
| Tamburro et al. | Cosmic ray spectrum, composition, and anisotropy measured with IceCube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20201013 |