CN110579789A - retrospective dosimetry method with high flux and stable signal intensity - Google Patents
retrospective dosimetry method with high flux and stable signal intensity Download PDFInfo
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- CN110579789A CN110579789A CN201910721078.5A CN201910721078A CN110579789A CN 110579789 A CN110579789 A CN 110579789A CN 201910721078 A CN201910721078 A CN 201910721078A CN 110579789 A CN110579789 A CN 110579789A
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- dosage
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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
- G01T1/02—Dosimeters
- G01T1/10—Luminescent dosimeters
Abstract
The invention discloses a retrospective dosimetry method with high flux and stable signal intensity, which comprises the following steps: firstly, preparing on-site table salt into a plurality of dosage elements; secondly, detecting each dosage element by using a pulse photoluminescence technology, and determining the detection times n required by the dosage element with the highest dosage on the premise of completely exciting the dosage information of the table salt; thirdly, detecting each dosage element irradiated with different dosages for n times to obtain the relationship between the salt OSL signal and the absorbed dosage; and fourthly, measuring the photoluminescence signal of the on-site table salt, and calculating the table salt absorbed dose according to the relation between the table salt OSL signal and the absorbed dose. The invention provides a retrospective dosimetry method with high flux and stable signal intensity by taking salt as a retrospective dosage material based on a photoluminescence technology, can effectively measure the radiation absorption dosage of the on-site salt in an emergency nuclear leakage event, and provides a measurement method with high flux and stable signal intensity for measuring the public dosage in a nuclear accident.
Description
Technical Field
The invention belongs to the technical field of nuclear radiation dosimetry measurement, and particularly relates to a retrospective dosimetry method with high flux and stable signal intensity.
Background
under the emergency nuclear leakage accident, people cannot directly obtain the ionizing radiation dose suffered by the people through the reading of the personal dosimeter because the people cannot carry the personal dosimeter of the ionizing radiation, and a retrospective dose method is needed to be adopted to measure the radiation dose of the people by using materials replacing the personal dosimeter. Common salt is distributed all over the world and can be easily collected in each household, workplaces, restaurants and other occasions, and the main component NaCl of the common salt has the characteristics of a photoluminescence material and can be used as a nuclear accident dosage material.
Retrospective dosage methods are divided into biological dosage methods and physical dosage methods, and for the biological dosage methods, substances at the cellular level or the molecular level in a human body are used as dosimeters, but the effects of different biological dosimeters in the human body and ionizing radiation are different, and dosage measurement needs to be performed on each person, so that the method is small in measurement flux and still less in application to emergency nuclear accidents; the physical dose method uses a physical material as a dose material for dose measurement, mainly including an electron spin resonance method, a thermoluminescence method and a photoluminescence method, and there are many materials that can be used for the electron spin resonance method and the thermoluminescence method, but in the two methods, the intensity of luminescence signals of most of the physical materials with dose information is seriously attenuated.
Disclosure of Invention
The object of the present invention is to provide a retrospective dosimetry method with high flux and stable signal intensity based on photoluminescence technology and using common salt as retrospective dosage material, which can effectively measure the radiation absorption dose of the common salt in the scene of the emergency nuclear leakage event, and provide a high flux and stable signal intensity measurement method for measuring the public dosage in nuclear accident.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
A retrospective dosimetry method with high throughput and stable signal strength is characterized by comprising the following steps:
firstly, manufacturing on-site table salt into a plurality of dosage elements;
secondly, detecting various dosage elements irradiated with different dosages by using a pulse photoluminescence technology, and determining the detection times n required by the dosage element with the highest dosage of table salt on the premise of completely exciting table salt dosage information;
Step three, detecting each dosage element n times to obtain the relation between the salt OSL signal and the absorbed dosage;
And step four, measuring a photoluminescence signal of the on-site salt, and calculating the absorbed dose of the salt according to the relation between the OSL signal of the salt and the absorbed dose.
as a preferred mode, the first step includes:
Collecting on-site salt and forming a plurality of salt samples;
A plurality of table salt samples are respectively irradiated with different doses to form a plurality of dose elements.
Further, still include: the salt samples were photo-annealed prior to irradiation of the test samples.
In one preferred embodiment, the pulse width is 20ms, the pulse interval is 1000ms, and the number of pulses is 50 during the detection.
as a preferable mode, the doses of the radiation to the plurality of salt samples are respectively as follows: 1mGy, 2mGy, 4mGy, 6mGy, 8mGy, 10mGy, 20mGy, 40mGy, 60mGy, 80mGy, 100 mGy.
Compared with the prior art, the invention provides a retrospective dosimetry method with high flux and stable signal intensity by taking common salt as a retrospective dosage material based on a photoluminescence technology, can effectively measure the radiation absorption dosage of the field common salt in an emergency nuclear leakage event, and provides a measurement method with high flux and stable signal intensity for measuring the public dosage in a nuclear accident.
drawings
FIG. 1 is a flow chart of an embodiment of the present invention.
FIG. 2 is the relationship between the photoluminescence signal of salt in 1-100mGy and the detection frequency.
Figure 3 is a dose response curve of the saline photoluminescence signal.
Detailed Description
in this example, the salt OSL signal was measured using an Inlight type 200 dose measuring system, blue dalton, usa, and pulse width, pulse interval, and pulse number parameters were set to 20ms, 1000ms, and 50, respectively.
As shown in fig. 1, an embodiment of the present invention comprises the following steps:
A. Making in situ salt into dosage elements:
collecting on-site salt and forming a plurality of salt samples;
Performing light annealing treatment on the salt sample to ensure that the background dosage of the salt is consistent;
different doses were irradiated on multiple saline samples: 1mGy, 2mGy, 4mGy, 6mGy, 8mGy, 10mGy, 20mGy, 40mGy, 60mGy, 80mGy, 100mGy, thereby forming a plurality of dosage elements.
B. the four-element salt container is manufactured by using a 3D printing technology, and can enter a measuring channel of an InLight200A type dosage measuring system to achieve the purpose of measuring a salt photoluminescence signal.
C. The irradiated salt dosage element was placed in a four-component salt container with transparent adhesive tape on both sides to secure the salt dosage element.
D. the four-element salt container is placed into an InLight200A type dosage measuring system, the detection times n required by the complete excitation of the salt (100mGy) dosage information are determined, and the salt is detected for all the dosages for the same times (n times), so that the relationship curve between the salt OSL signal and the dosage is obtained.
E. Measuring the photoluminescence signal of the on-site table salt, and calculating the table salt absorbed dose according to the relation between the table salt OSL signal and the absorbed dose.
while the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. a high-throughput and signal-intensity-stable retrospective dosimetry method, comprising the steps of:
Firstly, manufacturing on-site table salt into a plurality of dosage elements;
Secondly, detecting various dosage elements irradiated with different dosages by using a pulse photoluminescence technology, and determining the detection times n required by the dosage element with the highest dosage of table salt on the premise of completely exciting table salt dosage information;
Step three, detecting each dosage element n times to obtain the relation between the salt OSL signal and the absorbed dosage;
and step four, measuring a photoluminescence signal of the on-site salt, and calculating the absorbed dose of the salt according to the relation between the OSL signal of the salt and the absorbed dose.
2. The high-throughput, signal-strength-stabilized retrospective dosimetry of claim 1, wherein step one comprises:
Collecting on-site salt and forming a plurality of salt samples;
A plurality of table salt samples are respectively irradiated with different doses to form a plurality of dose elements.
3. a low detection limit radiation dosimetry method according to claim 2, further comprising: the salt samples were photo-annealed prior to irradiation of the test samples.
4. A radiation dosimetry method with low detection limit according to claim 2, wherein the doses of radiation to the plurality of table salt samples are respectively: 1mGy, 2mGy, 4mGy, 6mGy, 8mGy, 10mGy, 20mGy, 40mGy, 60mGy, 80mGy, 100 mGy.
5. a radiation dose measuring method with a low detection lower limit as defined in claim 1, wherein the pulse width is 20ms, the pulse interval is 1000ms, and the number of pulses is 50 during the detection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910474555 | 2019-06-03 | ||
| CN2019104745552 | 2019-06-03 |
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| CN110579789A true CN110579789A (en) | 2019-12-17 |
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Citations (6)
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| CN102576060A (en) * | 2009-10-06 | 2012-07-11 | 皇家飞利浦电子股份有限公司 | Retrospective calculation of radiation dose and improved therapy planning |
| CN105929442A (en) * | 2016-04-26 | 2016-09-07 | 中国疾病预防控制中心辐射防护与核安全医学所 | Individual dose equivalent meter calibration new method |
| WO2017054008A1 (en) * | 2015-09-27 | 2017-03-30 | Massachusetts Institute Of Technology | Integrating radiation dosimetry |
| CN107209274A (en) * | 2014-12-19 | 2017-09-26 | 国立研究开发法人理化学研究所 | Dose radiation determines gel and possesses its dosimeter as the measurement material of dose radiation |
| CN207318732U (en) * | 2017-05-10 | 2018-05-04 | 中山大学 | One kind is based on LiMgPO4:The light of Tm, Tb release the measuring system of light fibre-optical dosimeter |
| CN109115732A (en) * | 2018-08-02 | 2019-01-01 | 华南理工大学广州学院 | A kind of sensibility reciprocal bearing calibration of OSL dating experiment |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576060A (en) * | 2009-10-06 | 2012-07-11 | 皇家飞利浦电子股份有限公司 | Retrospective calculation of radiation dose and improved therapy planning |
| CN107209274A (en) * | 2014-12-19 | 2017-09-26 | 国立研究开发法人理化学研究所 | Dose radiation determines gel and possesses its dosimeter as the measurement material of dose radiation |
| WO2017054008A1 (en) * | 2015-09-27 | 2017-03-30 | Massachusetts Institute Of Technology | Integrating radiation dosimetry |
| CN105929442A (en) * | 2016-04-26 | 2016-09-07 | 中国疾病预防控制中心辐射防护与核安全医学所 | Individual dose equivalent meter calibration new method |
| CN207318732U (en) * | 2017-05-10 | 2018-05-04 | 中山大学 | One kind is based on LiMgPO4:The light of Tm, Tb release the measuring system of light fibre-optical dosimeter |
| CN109115732A (en) * | 2018-08-02 | 2019-01-01 | 华南理工大学广州学院 | A kind of sensibility reciprocal bearing calibration of OSL dating experiment |
Non-Patent Citations (3)
| Title |
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| D.EKENDAHL EA AL: "A low-cost personal dosemeter based on optically stimulated luminescence (OSL) of common household salt (NaCl)", 《RADIATION MEASUREMENTS》 * |
| 万新峰等: "基于CW_OSL模式的γ剂量探测系统设计", 《核电子学与探测技术》 * |
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