| JIAO Ling,ZHANG Wen-yi,DING Yan-qiu,et al.Estimation of solar radiation and its effects on tooth enamel electron spin resonance dosimetry[J].Chinese Journal of Radiological Medicine and Protection,2009,29(3):306-308 |
| Estimation of solar radiation and its effects on tooth enamel electron spin resonance dosimetry |
| Received:July 15, 2008 |
| DOI：10.3760/cma.j.issn.0254-5098.2009.03.023 |
| KeyWords:Solar illuminance Solar radiation Tooth enamel Electron spin resonance Dosimetry |
| FundProject: |
| Author Name | Affiliation | E-mail | | JIAO Ling | Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China | ljiao.irm@163.com | | ZHANG Wen-yi | Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China | | | DING Yan-qiu | Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China | | | ZHANG Liang-an | Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China | | | HOSHI Masaharu | 广岛大学原爆放射线医科学研究所 | |
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| Abstract:: |
| Objective To investigate solar radiation and its effects on human tooth enamel electron spin resonance (ESR) dosimetry. Methods 11 tooth enamel samples were prepared by mechanical method.The intensity of solar illuminance was measured with a light meter, the measured illuminance was converted to insolation using a coefficient. Summation of solar radiation was evaluated.Enamel samples were exposed to 6060Co γ rays followed by sunlight on sunny days, and ESR spectra were scanned after different exposure. Results The conversion coefficient for measured illuminance to insolation was (8.67±0.22) W·m-2klx. The integrated solar radiation to the samples was (580±16) MJm2. Solar exposure also caused dosimetric signal. The perpendicular component of dosimetric signal increased linearly with the amount of solar radiation, another signal close to background tended to saturation. Conclusions The average effect of the solar radiation on the signal was estimated by dose equivalent γ ray irradiation as (7.7±1.4) mGy·MJm2. Signal near to background may be used to recognize the effect of solar radiation on the enamel, and estimate external dose accurately. |
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