CN107132567B - X, gamma-rays ionising radiation strength detecting method in enclosure space - Google Patents
X, gamma-rays ionising radiation strength detecting method in enclosure space Download PDFInfo
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- CN107132567B CN107132567B CN201710185286.9A CN201710185286A CN107132567B CN 107132567 B CN107132567 B CN 107132567B CN 201710185286 A CN201710185286 A CN 201710185286A CN 107132567 B CN107132567 B CN 107132567B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
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Abstract
The present invention provides X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space, includes the following steps: to select the space radiant to be measured；It is that the former heart establishes three dimensional space coordinate with the space radiant；Reconnaissance is carried out later and is measured；End value is calculated finally by formula.
Description
Technical field
The present invention relates to radiation detections, in particular to X, gamma-rays ionising radiation strength detecting method in enclosure space.
Background technique
Radiation injury is a certain amount of effects of ionizing radiation after body, by according to pathological reaction caused by body.
When roentgen radiation x organism, and matter interactions such as body cell, tissue, body fluid, cause substance atom or point
Son ionization, thus certain macromolecular structures in body can be directly destroyed, such as make the fracture of protein molecular chain, ribonucleic acid or deoxidation
The significant enzyme etc. of some pairs of fracture of ribonucleic acid, destruction metabolisms, or even can coup injury eucaryotic cell structure.In addition
Ray can form some free radicals, pass through the indirect work of these free radicals by the hydrone being widely present in ionization body
For damaging body.As Other diseases, virulence factor acts on after body the pathogenesis of radiation injury, except causing point
It is sub horizontal, other than the variation of cellular level, also can produce a series of secondary action, eventually lead to organ level obstacle or even
The S&S of radiation insult can clinically occur in the variation of integral level.
After body, caused body injury is directly related with x-ray dosage for actinism.It is dynamic with various dose irradiation
Object when continuing growing dosage, then may occur in which it can be found that just starting acute radiation sickness sign occur when dosage reaches a certain amount of
Death, dosage is bigger, and the death rate is higher, and when increasing to certain big dosage, then 100% animal occurs dead.
It is clearly proposed in " ionization radiation protection and the safe basic standard of radiation source " GB18871-2002: 1. about work people
The dose equivalent limit of member is annual to the organized or organ of institute in addition to eye lens in terms of preventing nonrandomness limitation
0.5Sv (50rem) is annual 0.15Sv (15rem) in terms of controlling stochastic effect to eye lens, and it is every for having low dose of equivalent
Year, 0.05Sv (5rem) was 2. about dose equivalent limit personal in the public, was the 1/10 of staff's limit value.
Common x-ray radiation intensity generally uses X ray detector, such as RE2000 type portable radiant detector at present,
Its measurement range is dosage rate: 0.01 μ Sv/h~15mSv/h, but instrument generally has measurement error, and RE2000 type is portable
The error of radiation detector is ± 5% or so.
Due to the measurement error of instrument, it may cause following situations；For example national standard is≤20 μ Sv/h, detected value is
20.5 μ Sv/h exceed national standard；But the actual value that it may be measured due to measurement error is 20.5*0.96=19.68 μ
Sv/h, meets national standard, and testing result is qualification.
Above-mentioned error is eliminated, measuring instrument on the one hand can be improved, difficulty is larger, and precision is higher, and price is higher；Separately
On the one hand can there be relatively good measurement method energy improving measurement accuracy also at present from measurement method is improved.
Summary of the invention
The object of the present invention is to provide X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space, promote detection
Precision.
Above-mentioned technical purpose of the invention has the technical scheme that X, γ are penetrated in a kind of enclosure space
Line ionising radiation strength detecting method, includes the following steps:
1) the space radiant to be measured is selected；
2) three dimensional space coordinate is established for the former heart with the space radiant, later following steps:
A) it is built with M1 (0, Y, 0), M2 (X, 0,0), M3 (0 ,-Y, 0), M4 (- X, 0,0), M5 (0,0, Z), M6 (0,0 ,-Z)
First measurement point is found to measure and record；
B) with N1 (- X/2, Y/2, Z/2), N2 (- X/2, Y/2 ,-Z/2), N3 (X/2, Y/2, Z/2), N4 (X/2 ,-Y/2 ,-
Z/2)、N5(-X/2,-Y/2,Z/2)、N6(-X/2,-Y/2,-Z/2)、N7(X/2,-Y/2,Z/2)、N8(X/2,-Y/2,-Z/2)
Second batch measurement point is established to measure and record；
C) the is established with the midpoint of any point line in more any one and second batch measurement point in first measurement point
Three crowdes of measurement point P1, P2 ... P48 are measured and are recorded；
D) the radiation intensity A of space radiant in 1) is measured；
Wherein 8≤X=Y=Z≤10mm, same is selected in the above measurement process or with a collection of X ray detector,
M1-M6, N1-N8, P1-P48 represent the radiation intensity of measurement point；
E) standard deviation sigma that first mean value B, the mean value C of second batch and third are criticized is calculated,
Final result valueWherein E constant is 3.47.
Further, 8.5≤X=Y=Z≤8.9mm.
Further, the radiant is measured using X ray detector and obtain numerical value A, and be compared with standard value X, work as A
≤ X-b terminates measurement, and wherein X is national standard, and b is constant.
When data obviously meet national standard, if it is in security consideration, does not consider precision problem, it can not
It measures again.
Further, the error of X ray detector is ± 15%.
In conclusion the invention has the following advantages: by the detection method of this programme, detection accuracy is higher.
Specific embodiment
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Embodiment 1: X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space include the following steps:
1) the space radiant to be measured is selected；
2) three dimensional space coordinate is established for the former heart with the space radiant, later following steps:
A) it is built with M1 (0, Y, 0), M2 (X, 0,0), M3 (0 ,-Y, 0), M4 (- X, 0,0), M5 (0,0, Z), M6 (0,0 ,-Z)
First measurement point is found to measure and record；
B) with N1 (- X/2, Y/2, Z/2), N2 (- X/2, Y/2 ,-Z/2), N3 (X/2, Y/2, Z/2), N4 (X/2 ,-Y/2 ,-
Z/2)、N5(-X/2,-Y/2,Z/2)、N6(-X/2,-Y/2,-Z/2)、N7(X/2,-Y/2,Z/2)、N8(X/2,-Y/2,-Z/2)
Second batch measurement point is established to measure and record；
C) the is established with the midpoint of any point line in more any one and second batch measurement point in first measurement point
Three crowdes of measurement point P1, P2 ... P48 are measured and are recorded；
D) the radiation intensity A of space radiant in 1) is measured；
Wherein X=Y=Z=8mm, NSPECTOR ray alarm detection instrument is selected in the above measurement process, and (its precision is missed
Difference is ± 15%), M1-M6, N1-N8, P1-P48 represent the radiation intensity of measurement point；E) calculate first mean value B, second
The mean value C and third batches of standard deviation sigmas criticized, final result valueWherein E constant is 3.47.
Embodiment 2: X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space, the difference with embodiment 1 exist
In: X=Y=Z=8.5mm.
Embodiment 3: X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space, the difference with embodiment 1 exist
In: X=Y=Z=8.8mm.
Embodiment 4: X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space, the difference with embodiment 1 exist
In: X=Y=Z=9mm.
Embodiment 5: X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space, the difference with embodiment 1 exist
In: X=Y=Z=9.4mm.
Embodiment 6: X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space, the difference with embodiment 1 exist
In: X=Y=Z=9.9mm.
Comparative example 1: the sky in 1) step is directly directly measured in embodiment by RE2000 type portable radiant detector
Between radiant, measure numerical value be F.
Using embodiment 1-6 and comparative example 1, test 10 space radiants are chosen in a certain enclosure space.
By upper table, the result shows that, detection accuracy is can be improved in this programme, and imitates within the scope of 8.5≤X=Y=Z≤8.9mm
Fruit is best.
Claims (4)
1. X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space, which comprises the steps of:
1) the space radiant to be measured is selected；
2) three dimensional space coordinate is established for the former heart with the space radiant, later following steps:
A) is established with M1 (0, Y, 0), M2 (X, 0,0), M3 (0 ,-Y, 0), M4 (- X, 0,0), M5 (0,0, Z), M6 (0,0 ,-Z)
A collection of measurement point is measured and is recorded；
B) with N1 (- X/2, Y/2, Z/2), N2 (- X/2, Y/2 ,-Z/2), N3 (X/2, Y/2, Z/2), N4 (X/2 ,-Y/2 ,-Z/2),
N5 (- X/2 ,-Y/2, Z/2), N6 (- X/2 ,-Y/2 ,-Z/2), N7 (X/2 ,-Y/2, Z/2), N8 (X/2 ,-Y/2 ,-Z/2) establish
Two batches of measurement points are measured and are recorded；
C) third batch is established with the midpoint of any point line in more any one in first measurement point and second batch measurement point
Measurement point P1, P2 ... P48 is measured and is recorded；
D) the radiation intensity A of space radiant in 1) is measured；
Wherein 8≤X=Y=Z≤10mm, same is selected in the above measurement process or with a collection of X ray detector, M1-M6,
N1-N8, P1-P48 represent the radiation intensity of measurement point；
E) standard deviation sigma that first mean value B, the mean value C of second batch and third are criticized, final result value are calculatedWherein E constant is 3.47.
2. X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space according to claim 1, it is characterized in that:
8.5≤X=Y=Z≤8.9mm.
3. X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space according to claim 1, it is characterized in that: making
The radiant is measured with X ray detector and obtains numerical value A, and is compared with standard value X, as A≤X-b, terminates measurement, wherein
X is national normal value, and b is constant.
4. X, gamma-rays ionising radiation strength detecting method in a kind of enclosure space according to claim 1, it is characterized in that: X
The error of gamma meter is ± 15%.
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| CN106019353A (en) * | 2016-07-29 | 2016-10-12 | 济南市环境监测中心站 | Environmental radiation detection method |
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Patent Citations (8)
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| JP2008180585A (en) * | 2007-01-24 | 2008-08-07 | Toshiba Corp | Sphere-shaped ionization chamber detector |
| CN101520482A (en) * | 2009-03-31 | 2009-09-02 | 北京航空航天大学 | Electromagnetic radiation sensitivity testing method for increasing test precision |
| CN103376367A (en) * | 2012-04-20 | 2013-10-30 | 株式会社Noise研究所 | Emission signal visualization device |
| CN104704389A (en) * | 2012-10-09 | 2015-06-10 | 国立大学法人德岛大学 | Device for measuring radiation intensity of small sealed radiation source for cancer therapy |
| CN103076503A (en) * | 2012-12-27 | 2013-05-01 | 广东省辐射防护协会 | Environmental electromagnetic radiation three-dimensional prediction method of GSM (Global System for Mobile Communication) mobile communication base station |
| CN105277963A (en) * | 2015-12-02 | 2016-01-27 | 成都理工大学 | Positioning searching device and method for three-dimensional space gamma radiation source |
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