CN208110056U - A kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton - Google Patents
A kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton Download PDFInfo
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- CN208110056U CN208110056U CN201820530974.4U CN201820530974U CN208110056U CN 208110056 U CN208110056 U CN 208110056U CN 201820530974 U CN201820530974 U CN 201820530974U CN 208110056 U CN208110056 U CN 208110056U
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Abstract
The utility model discloses a kind of wide energy antiuniverse ray pured germanium crystal spectrometers of anti-Compton, including screened room, annular detector is provided in the middle part of the indoor bottom side of shielding, the first cavity and the second cavity are respectively arranged with inside the annular detector, corresponding side in first cavity is provided with the second photomultiplier tube, main detector is provided in the middle part of the bottom side of first cavity, and the bottom of second cavity is fixed on the top of the main detector, the top of the main detector is provided with articles holding table, and the bottom of second cavity is fixed in the bottom of the articles holding table, the shielding chamber outer wall is provided with copper liner, the copper liner outer wall is provided with interior lead ring, the interior lead ring outer wall is provided with Cd uptake piece.Beneficial effect：This device realizes the function of anti-Compton scattering and antiuniverse ray simultaneously, further increases radiometric precision, reduces Monitoring lower-cut to greatest extent.
Description
Technical field
The utility model relates to radioactivity survey technical fields, it particularly relates to which a kind of wide energy anti-Compton is antiuniverse
Ray pured germanium crystal spectrometer.
Background technique
Energy of γ ray is in the energy range of tens KeV to MeV, and semiconductor detector, scintillation crystal detectors measure
Power spectrum in, the area on Compton level ground is often bigger, to complexity spectrum parsing increase difficulty.It is gamma-ray compared with low energy
Full energy peak can be superimposed upon on the Compton level ground of high energy gamma spectrum, due to the statistic fluctuation of technology on level ground, to leverage low
The precision of the all-round peak area measurement of energy gamma-rays, or it is possible to the basic full energy peak found less than low-energyγ-ray.Radioactivity
The background level of measurement directly affects its detection limit, and the natural radionuclide in cosmic ray and environment will increase full spectrum
Integral background it is horizontal.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Utility model content
For the problems in the relevant technologies, the utility model proposes a kind of wide antiuniverse ray HpGe spectrums of energy anti-Compton
Instrument, to overcome above-mentioned technical problem present in existing the relevant technologies.
What the technical solution of the utility model was realized in：
A kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton, including screened room, it is described to shield in indoor bottom side
Portion is provided with annular detector, and the first cavity and the second cavity are respectively arranged with inside the annular detector, and described first is empty
Intracavitary corresponding side is provided with the second photomultiplier tube, is provided with main detector in the middle part of the bottom side of first cavity,
And the bottom of second cavity is fixed on the top of the main detector, the top of the main detector is provided with articles holding table,
And the bottom of second cavity is fixed in the bottom of the articles holding table, the shielding chamber outer wall is provided with copper liner, the copper
Liner outer wall is provided with interior lead ring, and the interior lead ring outer wall is provided with Cd uptake piece, and the Cd uptake piece outer wall is provided with plastics
Scintillation detector, the plastic scintillation detectors outer wall are provided with external shielding layer, and a side bottom of the external shielding layer is provided with
Amplifier, the top central portion of the external shielding layer are provided with groove one compatible with the annular detector, and the groove
One runs through the plastic scintillation detectors, the Cd uptake piece, the interior lead ring and the copper liner, the top of the groove one
Portion is provided with closing lid compatible with the external shielding layer, is provided with and the annular detector phase in the middle part of the bottom side of the closing lid
The groove two of adaptation, the top of the groove two is provided with plug detector, and is fixed on institute at the top of the plug detector
The corresponding side of closing lid is stated, the side of the plug detector is provided with the first photomultiplier tube, the plug detector
Top side is provided with electronics anticoincidence circuit, and the top of the electronics anticoincidence circuit is provided with analyzer, and described
The top side of the closing lid is fixed in the bottom end of analyzer, the side of the analyzer and with the electronics anticoincidence circuit
Vertical side is provided with spectrum analysis instrument, and the top of the closing lid is fixed in the bottom of the spectrum analysis instrument.
Further, the bottom of second cavity is set to the top of first cavity.
Further, the side of first photomultiplier tube passes through the corresponding side of bolt and the plug detector
It is fixedly connected.
Further, the main detector, the annular detector and the plug detector together form anti-symbol
Close shielded probe.
Further, the bottom of the analyzer and the spectrum analysis instrument passes through the top of fixing bolt Yu the closing lid
It is fixedly connected.
Further, light-shielding film layer is provided at the top of the top of the plug detector and the annular detector.
The beneficial effects of the utility model：External shield thickness 11.5cm, for reducing natural radionuclide and secondary space
Influence of the cosmos ray soft component to plastic scintillation detectors counting rate and spectrometer background, plastic scintillation detectors are as anticoincidence screen
Cover and can inhibit cosmic ray μ subconstiuent, can also slowing down or thermalization fast neutron, Cd uptake piece as thermal neutron shield, 4 directions π packet
Interior lead ring is enclosed, interior lead ring further decreases spectrometer background, while the gamma-rays for preventing sample from issuing is visited by plastic scintillation detectors
It surveys, copper liner is mainly used for shielding a piece of wood serving as a brake to halt a carriage radiation that the β ray of Pb daughter Bi generates, the first photomultiplier tube and the second photomultiplier transit
Pipe is powered by unified high voltage power supply, output signal be directly added after through amplifier as anticoincidence signal input spectrum analyzer；
When high-energy radiation is through main detector and Anticoincidence shield detector, when two detectors have signal output, subsequent electronics
Learning anticoincidence circuit will be such that these signals are not recorded by spectrometer, to play the role of inhibition or shielding background signal is this anti-
The antiuniverse ray pured germanium crystal spectrometer in Compton realizes the function of anti-Compton scattering and antiuniverse ray simultaneously, further increases and puts
The precision of penetrating property measurement, reduces Monitoring lower-cut to greatest extent.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the summary according to a kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton of the utility model embodiment
Structure schematic diagram.
In figure：
1, screened room；2, annular detector；3, the first cavity；4, the second cavity；5, the second photomultiplier tube；6, main detection
Device；7, articles holding table；8, copper liner；9, interior lead ring；10, Cd uptake piece；11, plastic scintillation detectors；12, external shielding layer；13, it puts
Big device；14, groove one；15, closing lid；16, groove two；17, plug detector；18, the first photomultiplier tube；19, electronics is anti-
Coincidence circuit；20, analyzer；21, spectrum analysis instrument；22, light-shielding film layer.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained, all belongs to
In the range of the utility model protection.
Embodiment according to the present utility model provides a kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton.
As shown in Figure 1, according to a kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton of the utility model embodiment,
Including screened room 1, it is provided with annular detector 2 in the middle part of the bottom side in the screened room 1, distinguishes inside the annular detector 2
It is provided with the first cavity 3 and the second cavity 4, the corresponding side in first cavity 3 is provided with the second photomultiplier tube
5, the bottom side middle part of first cavity 3 is provided with main detector 6, and the top of the main detector 6 is fixed on described second
The bottom of cavity 4, the top of the main detector 6 is provided with articles holding table 7, and the bottom of the articles holding table 7 is fixed on described
The bottom of two cavitys 4,1 outer wall of screened room are provided with copper liner 8, and 8 outer wall of copper liner is provided with interior lead ring 9, described
Interior 9 outer wall of lead ring is provided with Cd uptake piece 10, and 10 outer wall of Cd uptake piece is provided with plastic scintillation detectors 11, the plastics
11 outer wall of scintillation detector is provided with external shielding layer 12, and a side bottom of the external shielding layer 12 is provided with amplifier 13, described
The top central portion of external shielding layer 12 is provided with groove 1 compatible with the annular detector 2, and the groove 1 passes through
Wear the plastic scintillation detectors 11, the Cd uptake piece 10, the interior lead ring 9 and the copper liner 8, the groove 1
Top be provided with closing lid 15 compatible with the external shielding layer 12, be provided with and the ring in the middle part of the bottom side of the closing lid 15
The compatible groove 2 16 of shape detector 2, the top of the groove 2 16 is provided with plug detector 17, and the plug detects
The corresponding side of the closing lid 15 is fixed at the top of device 17, and the side of the plug detector 17 is provided with the first photoelectricity times
Increase pipe 18, the top side of the plug detector 17 is provided with electronics anticoincidence circuit 19, the electronics anticoincidence line
The top on road 19 is provided with analyzer 20, and the top side of the closing lid 15 is fixed in the bottom end of the analyzer 20, described
The side of analyzer 20 and vertical side is provided with spectrum analysis instrument 21, and the spectrum with the electronics anticoincidence circuit 19
The top of the closing lid 15 is fixed in the bottom of analyzer 21.
With the aid of the technical scheme, 12 thickness 11.5cm of external shielding layer, for reducing natural radionuclide and secondary space
Influence of the cosmos ray soft component to plastic scintillation detectors 11 counting rate and spectrometer background, plastic scintillation detectors 11 are as anti-symbol
Close shielding can inhibit cosmic ray μ subconstiuent, can also slowing down or thermalization fast neutron, Cd uptake piece 10 as thermal neutron shield, 4 π
Direction surrounds interior lead ring 9, and interior lead ring 9 further decreases spectrometer background, while the gamma-rays for preventing sample from issuing is by Plastic scintillation
Detector 11 detects, and copper liner 8 is mainly used for shielding a piece of wood serving as a brake to halt a carriage radiation that the β ray of Pb daughter Bi generates, the first photomultiplier tube 18
Powered with the second photomultiplier tube 5 by unified high voltage power supply, output signal is directly added after through amplifier as anticoincidence letter
Number input spectrum analyzer；When high-energy radiation is through main detector 6 and Anticoincidence shield detector, two detectors have signal defeated
When out, subsequent electronics anticoincidence circuit 19 will be such that these signals are not recorded by spectrometer, to play inhibition or shielding originally
The antiuniverse ray pured germanium crystal spectrometer of this anti-Compton of the effect of bottom signal realizes anti-Compton scattering and antiuniverse ray simultaneously
Function, further increase radiometric precision, reduce Monitoring lower-cut to greatest extent.
In addition, the bottom of second cavity 4 is set to the top of first cavity 3, meets structure and place demand；Institute
The side for stating the first photomultiplier tube 18 is fixedly connected by bolt with the corresponding side of the plug detector 17, in order to can
To fix the first photomultiplier tube and easy to disassemble；The main detector 6, the annular detector 2 and plug detection
Device 17 together forms Anticoincidence shield detector to meet device operation demand；The analyzer 20 and the spectrum analysis
The bottom of instrument 21 passes through fixing bolt and is fixedly connected with the top of the closing lid 15, prevents analyzer and spectrum analysis instrument from falling off；Institute
The top at the top and the annular detector 2 of stating plug detector 17 is provided with light-shielding film layer 22, avoids plug detector
Light source is directly contacted with annular detector or contacted intense light source damages.
In conclusion by means of the above-mentioned technical proposal of the utility model, 12 thickness 11.5cm of external shielding layer, for reducing day
The right influence of radionuclide and secondary cosmic rays soft component to plastic scintillation detectors 11 counting rate and spectrometer background, plastics
Scintillation detector 11 can inhibit cosmic ray μ subconstiuent as Anticoincidence shield, can also slowing down or thermalization fast neutron, Cd uptake piece
10 shield as thermal neutron, and 4 directions π surround interior lead ring 9, and interior lead ring 9 further decreases spectrometer background, while sample being prevented to issue
Gamma-rays detected by plastic scintillation detectors 11, copper liner 8 be mainly used for shield Pb daughter Bi β ray generate a piece of wood serving as a brake to halt a carriage spoke
It penetrates, the first photomultiplier tube 18 and the second photomultiplier tube 5 are powered by unified high voltage power supply, and output signal passes through after being directly added
Amplifier is as anticoincidence signal input spectrum analyzer；When high-energy radiation is through main detector 6 and Anticoincidence shield detector, two
When a detector has signal output, subsequent electronics anticoincidence circuit 19 will be such that these signals are not recorded by spectrometer, from
And plays the role of inhibition or the antiuniverse ray pured germanium crystal spectrometer of shielding this anti-Compton of background signal while realizing anti-Kang Pu
Scattering and antiuniverse ray function, further increase radiometric precision, reduce Monitoring lower-cut to greatest extent.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (6)
1. a kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton, which is characterized in that including screened room (1), the shielding
It is provided with annular detector (2) in the middle part of bottom side in room (1), is respectively arranged with the first cavity inside the annular detector (2)
(3) and the second cavity (4), the corresponding side in first cavity (3) is provided with the second photomultiplier tube (5), described
It is provided with main detector (6) in the middle part of the bottom side of first cavity (3), and the top of the main detector (6) is fixed on described second
The top of the bottom of cavity (4), the main detector (6) is provided with articles holding table (7), and the bottom of the articles holding table (7) is fixed
In the bottom of second cavity (4), screened room (1) outer wall is provided with copper liner (8), and copper liner (8) outer wall is set
It is equipped with interior lead ring (9), interior lead ring (9) outer wall is provided with Cd uptake piece (10), and Cd uptake piece (10) outer wall is provided with
Plastic scintillation detectors (11), plastic scintillation detectors (11) outer wall are provided with external shielding layer (12), the external shielding layer
(12) a side bottom is provided with amplifier (13), and the top central portion of the external shielding layer (12) is provided with and the annular detection
The compatible groove one (14) of device (2), and the groove one (14) runs through the plastic scintillation detectors (11), the Cd uptake
Piece (10), the interior lead ring (9) and the copper liner (8) are provided with and the external shield at the top of the groove one (14)
The compatible closing lid (15) of layer (12), the bottom side middle part of the closing lid (15) is provided with to be adapted with the annular detector (2)
Groove two (16), be provided with plug detector (17) at the top of the groove two (16), and the plug detector (17)
The corresponding side of the closing lid (15) is fixed at top, and the side of the plug detector (17) is provided with the first photomultiplier transit
It manages (18), the top side of the plug detector (17) is provided with electronics anticoincidence circuit (19), and the electronics is counter to be accorded with
The top on zygonema road (19) is provided with analyzer (20), and the top of the closing lid (15) is fixed in the bottom end of the analyzer (20)
Portion side, the side of the analyzer (20) and with the electronics anticoincidence circuit (19) at vertical side be provided with spectrum point
Analyzer (21), and the top of the closing lid (15) is fixed in the bottom of the spectrum analysis instrument (21).
2. a kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton according to claim 1, which is characterized in that described
The bottom of second cavity (4) is set to the top of first cavity (3).
3. a kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton according to claim 1, which is characterized in that described
The side of first photomultiplier tube (18) is fixedly connected by bolt with the corresponding side of the plug detector (17).
4. a kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton according to claim 1, which is characterized in that described
Main detector (6), the annular detector (2) and the plug detector (17) together form Anticoincidence shield detection
Device.
5. a kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton according to claim 1, which is characterized in that described
The bottom of analyzer (20) and the spectrum analysis instrument (21) passes through to be fixedly connected at the top of fixing bolt and the closing lid (15).
6. a kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton according to claim 1, which is characterized in that described
Light-shielding film layer (22) are provided at the top of the top and the annular detector (2) of plug detector (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820530974.4U CN208110056U (en) | 2018-04-12 | 2018-04-12 | A kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton |
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| CN201820530974.4U CN208110056U (en) | 2018-04-12 | 2018-04-12 | A kind of wide energy antiuniverse ray pured germanium crystal spectrometer of anti-Compton |
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Cited By (6)
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| CN109637681A (en) * | 2018-12-28 | 2019-04-16 | 南华大学 | Nuclear fuel damage detection device and detection method |
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| CN110286404A (en) * | 2019-04-28 | 2019-09-27 | 南京核安核能科技有限公司 | A kind of screening arrangement and its application method digitizing anti-Compton pured germanium crystal spectrometer |
| CN112764086A (en) * | 2020-12-28 | 2021-05-07 | 中国科学技术大学 | Miniaturized compound gamma spectrometer |
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2018
- 2018-04-12 CN CN201820530974.4U patent/CN208110056U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696700A (en) * | 2018-12-27 | 2019-04-30 | 中国工程物理研究院材料研究所 | Extremely low level higher chain product radioactive waste packet detection system |
| CN109696700B (en) * | 2018-12-27 | 2020-12-22 | 中国工程物理研究院材料研究所 | Extremely low level transuranic nuclide radioactive waste package detection system |
| CN109637681A (en) * | 2018-12-28 | 2019-04-16 | 南华大学 | Nuclear fuel damage detection device and detection method |
| CN109725342A (en) * | 2019-01-01 | 2019-05-07 | 中国人民解放军63653部队 | A kind of scatter suppression detecting structure with the measurement of low-energyγ-ray on site |
| CN109633732A (en) * | 2019-01-09 | 2019-04-16 | 中国原子能科学研究院 | A kind of measuring device |
| CN110286404A (en) * | 2019-04-28 | 2019-09-27 | 南京核安核能科技有限公司 | A kind of screening arrangement and its application method digitizing anti-Compton pured germanium crystal spectrometer |
| CN110286404B (en) * | 2019-04-28 | 2022-07-26 | 南京核安核能科技有限公司 | Shielding device of digital anti-Compton high-purity germanium spectrometer and using method thereof |
| CN112764086A (en) * | 2020-12-28 | 2021-05-07 | 中国科学技术大学 | Miniaturized compound gamma spectrometer |
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Granted publication date: 20181116 |