军事医学2017，Vol.41Issue(4)：278-281,4.DOI:10.7644/j.issn.1674-9960.2017.04.007
含碳酸根羟基磷灰石剂量计材料性能稳定性的实验研究
Stability of carbonate hydroxyapatite dosimeter material
摘要
Abstract
Objective To develop a promising type of radiation dosimeter based on doped hydroxyapatite,and to study the stability of dosimetric characteristics indepth.Methods The samples prepared by stereotyping techniques were stored under different temperatures,humidity and illumination conditions after 60Co γ-ray irradiation.Electron spin resonance (ESR) technique was used to quantitatively measure the radiation-induced free radical signal.Results The signal change was less than 3% when the dosimeter was preserved at 4℃ or room temperature within 3 months in the experiment.At 40℃,the signal changed by about 13%,but at room temperature with the humidity less than 36%,the signal changed less than 2%.The change rose to about 8% when humidity was 76%.However,no significant decay of signal strength occurred at relatively high temperatures and under high humidity conditions.When the samples were stored under average illumination of 1600 lux or in a light-resistant container,the signal changes were less than 3.8% or 3.4% respectively.Long-term stability inspection at room temperature suggested a signal change within 4.8%.Conclusion The dosimetric properties of the material don't change significantly below room temperature in a natural environment and exhibit good stability over long-term storage.The free radical signal is not influenced drastically by relatively strong light exposure.However,a high temperature or a highly humid environment may have some effect on the measurement process,which should be taken into consideration in further applications.关键词
羟基磷灰石类/辐射剂量计/稳定性/电子自旋共振/自由基Key words
hydroxyapatites/radiation dosimeter/stability/electron spin resonance/free radicals分类
医药卫生引用本文复制引用
马蕾,刘晔,丛建波,纪云龙,董国福,郭俊旺,吴可..含碳酸根羟基磷灰石剂量计材料性能稳定性的实验研究[J].军事医学,2017,41(4):278-281,4.基金项目
国家自然科学基金资助项目(31670862) （31670862）
