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Design of a novel optically stimulatedluminescent dosimeter using alkaline earth sulfides doped with SrS:Eu,Sm materials

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Progress in Natural Science:Materials International 2008年第10期18卷 1203-1207页

作者： Yanping Liu~(a,b) Zhaoyang Chen~(a,*) Yanwei Fan~a Weizhen Ba~a Wu Lu~a Qi Guo~a Shilie Pan~a Aimin Chang~a Xinqiang Tang~a ~aXinjiang Technical Institute of Physics & Chemistry,Chinese Academy of Sciences,40-1 South Beijing Road,Urumqi 830011,China ~b Graduate School of Chinese Academy of Sciences,Beijing 100049,China Xinjiang Technical Institute of Physics & Chemistry Chinese Academy of Sciences 40-1 South Beijing Road Urumqi 830011 China Graduate School of Chinese Academy of Sciences Beijing 100049 China

Optically stimulated luminescence (OSL) is the luminescence emitted from an irradiated insulator or semiconductor during exposure to light.The OSL intensity is a function of the dose of radiation absorbed by the sample and thus can be used as the basis of a radiation dosimetry method.Alkaline earth sulfides doped with rare-earth elements such as Ce,Sm and Eu are OSL dosimeters having very high sensitivity,and the OSL with a short time constant is separated from the stimulated light.In this paper,a novel OSL dosimeter designed with SrS:Eu,Sm materials is described.The dosimeter takes advantage of the characteristics of charge trapping materials SrS:Eu,Sm that exhibit OSL.The measuring range of the dosimeter is from 0.01 to 100Gy.The equipment,which is relatively simple and small in size,is promising for applications in space exploration and high dose radiation dosimetry.

关键词： Optically stimulated luminescence Radiation measurement dosimeter Radiation protection

GENERAL PROPERTIES OF DOMESTIC RADIOCHROMIC FILM ELECTRON dosimeter

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Nuclear Science and Techniques 1991年第4期2卷 193-198页

作者：陈丽姝闻友勤孙存普 China Institute of Atornic Energy Beijing 102413 China

The project established a system for routine measurement of electron dose and brought about a complete experimental approach for high-dose dosimetry. The paper reports some general properties of domestic radiochromic pararosaniline cyanide (PR-CN) dye with polyvinyl butyral (PVB)-based film used for measuring electron dose. The optical absorption spectrum, the change in optical density as a function of thickness, distribution of the background optical density and spread of response, long-term stability, linear relationship between the change in optical density per unit thickness and absorbed dose, the minimum detectable limit, effect of environmental factors on background and response after irradiation, effect of light-exposition and the time of establishing complete response have been experimentally investigated.

关键词： Electron dosimeter High dose dosimetry Film dosimeter Radiation processing

A uranyl based coordination polymer showing response to low-dosage ionizing radiations down to 10^(−5) Gy

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Science China Chemistry 2020年第11期63卷 1608-1612页

作者： Jian Xie Yaxing Wang Wei Liu Chengyu Liang Yugang Zhang Lanhua Chen Daopeng Sheng Zhifang Chai Shuao Wang School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow UniversitySuzhou 215123China School of Environment and Material Engineering Yantai UniversityYantai 264005China

Radiation detection material is a central component of nuclear technology finding applications in many critical fields.Developing a highly radiation-sensitive material that shows a facilely detectable response to ultra-low dosage of radiation is a long-term research target and remains to be a challenge.Previously reported most optimal chemical radiation dosimeter can detect low-dosage X-andγ-ray radiations down to 10^(−4) Gy.We document here a new photoresponsive coordination polymer showing upgraded radiation detection capabilities with the detection limit on the radiation dose one order of magnitude lower than the previous record.The radiation induced photoluminescence quenching process was elucidated by multiple spectroscopic characterizations.

关键词： uranium photoluniinescence radiation detection dosimeter

dosimeter Film Based on Ethyl Violet-Bromophenol Blue Dyed Poly(Vinyl Alcohol)

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Open Journal of Polymer Chemistry 2013年第1期3卷 1-5页

作者： Seif Ebraheem Moushera El-Kelany 不详

Dyed poly(vinyl alcohol) (PVA) films, prepared by a simple technique of casting aqueous solutions of PVA containing a mixture of Ethyl violet and bromophenol blue (EV-BPB) on a horizontal glass plate, are useful as routine high-dose dosimeter in the 1 - 30 kGy range. The color of films changes from violet to yellow when exposed to gamma radiation. The response of this dosimeter depends up on the concentration of chloral hydrate (CH) in the polymer material. The radiation chemical yield (G-value) of PVA dyed film was calculated and found to increase by increasing concentration of chloral hydrate. Post-irradiation storage on the response of the films are discussed. The overall combined uncertainty (at 2σ) associated with measurement of response (ΔA mm-1) at 600 nm for dose range 1 - 15 kGy is 5.6%.

关键词： Ethyl-Violet and Bromo-Phenol Blue Poly(Vinyl Alcohol) Gamma Ray dosimeter

Sm-doped CsBr crystal as a new radio-photoluminescence (RPL) material

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Journal of Rare Earths 2016年第8期34卷 769-773页

作者： Go Okada Yutaka Fujimoto Hironori Tanaka Safa Kasap Takayuki Yanagida Graduate School of Materials Science Nara Institute of Science and Technology (NAIST) 8916-5 Takayama Ikoma Nara 630-0192 Japan Department of Applied Chemistry Graduate School of Engineering Tohoku University 6-6-07 Aoba Aramaki Aoba-ku Sendai 980-8579 Japan Department of Electrical and Computer Engineering University of Saskatchewan 57 Campus Dr. Saskatoon SK S7N5A9 Canada

Radio-photoluminescence （RPL） is a phenomenon seen in luminescent materials in which the appearance of new photolu- minescence （PL） emission is induced by an incident ionizing radiation such as X-rays; and the signal is stable even after the irradia- tion and during the PL measurement. Since the induced PL intensity is proportional to the irradiation dose, the RPL can be used in ra- diation measurements. The distinct advantage of RPL over the conventional thermally- or photo-stimulated luminescence （abbrevi- ated as TSL or PSL） dosimeters is the stability of response signal. With an RPL detector, it allows us to readout the signal multiple time without signal fading. In this work, we discovered that CsBr：Sm showed an RPL phenomenon by X-ray irradiation, and we characterized this new material as an RPL detector. While the sample showed PL emissions mainly in the visible range, after an X-ray irradiation additional emissions could be observed in the red to near-infrared range around 650-850 nm and 900-1000 nm and longer. The RPL response was fairly stable overall, but very interestingly the 650-850 nm signal slightly increased while the 900-1000 nm decreased during PL readout. The dynamic range was confirmed over 1-104 mGy with linear response.

关键词： radio-photoluminescence RPL CsBr Sm dosimeter X-rays rare earths

Photon energy response optimization using few-channel spectroscopy dose method for Si-PIN photodetector applied in personal dose equivalent measurements

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Nuclear Science and Techniques 2020年第4期31卷 37-46页

作者： Ping Huang Shu-Qiong Li Run-Dong Yang Yun-Tian Sun Yong Yang Wu Gao National Institute of Measurement and Testing Technology Chengdu 610021China Sichuan Radiation Technology Co. LtdChengdu 610021China Institute of Microelectronics School of Computer S&TNorthwestern Polytechnical UniversityXi’an 710072China

Si-PIN photodetectors having features such as low cost,small size,low weight,low voltage,and low power consumption are widely used as radiation detectors in electronic personal dosimeters(EPDs).The technical parameters of EPDs based on the Si-PIN photodetectors include photon energy response(PER),angular response,inherent error,and dose rate linearity.Among them,PER is a key parameter for evaluation of EPD measurement accuracy.At present,owing to the limitations of volume,power consumption,and EPD cost,the PER is usually corrected by a combination of single-channel counting techniques and filtering material methods.However,the above-mentioned methods have problems such as poor PER and low measurement accuracy.To solve such problems,in this study,a 1024-channel spectrometry system using a Si-PIN photodetector was developed and fullspectrum measurement in the reference radiation fields was conducted for radiation protection.The measurement results using the few-channel spectroscopy dose method showed that the PER could be controlled within±14%and±2%under the conditions of two and three energy intervals,respectively,with different channel numbers.The PER measured at 0°angle of radiation incidence meets the-29%to+67%requirements of IEC 61526:2010.Meanwhile,the channel number and counts-to-dose conversion factors formed in the experiment can be integrated into an EPD.

关键词： Electronic personal dosimeter Si-PIN photodetector Personal dose equivalent Photon energy response Few-channel spectroscopy dose method

RESEARCH ON FADING CHARACTERISTICS OF ALANINE/ESR dosimeterS IN HIGH DOSE RANGE

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Nuclear Science and Techniques 1993年第1期4卷 4-10页

作者：陈丽姝 H.Tachibana Y.Haruyama China Institute of Atomic Energy Beijing 102413 China Japanese Atomic Energy Research Institute Takasaki Japan

The present work has dealt extensively and systematically with the fading characteristics of polystyrene-alanine dosimeters irradiated at different dose rates and total doses under various temperatures (10-70 ℃) and stored a period of time in different conditions (5, 25, room temperature, 40 ℃). Detail investigation on this effect in practical irradiation condition is very important. Because it is difficult to correct this effect using correction coefficients so far. So the temperature coefficients and fading rates have been given along with a lot of experimental data to try to make approximation of radical formation or decay behavior.

关键词： Radiation processing dosimetry PS-alanine dosimeter ESR Transfer dosimeter Temperature coefficients Fading behaviour

A study on the real-time radiation dosimetry measurement system based on optically stimulated luminescence

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Chinese Physics C 2008年第5期32卷 381-384页

作者：刘艳平陈朝阳巴维真范艳伟杜彦召潘世列郭旗 Xinjiang Technical Institute of Physics & Chemistry Chinese Academy of SciencesUrumchi 830011China Graduate University of Chinese Academy of SciencesBeijing 100049China Xinjiang Technical Institute of Physics & Chemistry Chinese Academy of SciencesUrumchi 830011China

The optically stimulated luminescent （OSL） radiation dosimeter technically surveys a wide dynamic t range and a high sensitivity. Optical fiber dosimeters provide capability for remote monitoring of the radiation in the locations which are difficult-to-access and hazardous. In addition, optical fiber dosimeters are immune to electrical and radio-frequency interference. In this paper, a novel remote optical fiber radiation dosimeter is described. The optical fiber dosimeter takes advantage of the charge trapping materials CaS：Ce, Sm that exhibit OSL. The measuring range of the dosimeter is from 0.1 to 100 Gy. The equipment is relatively simple and small in size, and has low power consumption. This device is suitable for measuring the space radiation dose and also can be used in high radiation dose condition and other dangerous radiation occasions.

关键词： optically stimulated 1 online and realtime dosimeter

Effect of Gold Nanoparticle on Percentage Depth Dose of 18 MV X-Ray in MAGICA Polymer Gel dosimeter

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Open Journal of Microphysics 2013年第2期3卷 28-33页

作者： Mohammad Mahdavi Mahbobeh Khadem-Abolfazli Seyed Rabee Mahdi Mahdavi Gholamreza Ataei Medical Physics Department Tehran University of Medical Sciences Tehran Iran Para Medical Department Babol University of Medical Sciences Babol Iran Physics Department Mazandaran University Babolsar Iran

Radiation-sensitive polymer gels are among the most promising three-dimensional dose verification tools and tissue-like phantom developed to date. This study is an investigating of percentage depth dose enhancement within the gel medium with the use of conformal distribution gold nanoparticle as contrast agents by high atomic number material. In this work, the normoxic polymer gel dosimeter MAGICA tissue-equivalence was first theoretically verified using MCNPX Monte Carlo code and experimentally by percentage depth dose curves within the gel medium. Then gold nanoparticles (GNPs) of 50 nm diameter with different concentrations of 0.1 mM, 0.2 mM, and 0.4 mM were embedded in MAGICA gel and irradiated by 18 MV photon beam. Experimental results have shown dose increase of 10%, 2% and 4% in 0.1 mM, 0.2 mM and 0.4 mM concentrations, respectively. Simulation results had good agreement in the optimum concentration of 0.1 mM. The largest error between experimental and simulation results was equal to 9.28% stood for 0.4 mM concentration. The results showed that the optimum concentration of gold nanoparticles to achieve maximum absorbed dose in both experimental and simulation was 0.1 mM and so it can be used for clinical studies.

关键词： Percentage Depth Dose Polymer Gel dosimeter Gold Nanoparticles