含碳酸根羟基磷灰石剂量计材料性能稳定性的实验研究

发布时间：2018-03-20 23:01

  本文选题：羟基磷灰石类　切入点：辐射剂量计　出处：《军事医学》2017年04期 　论文类型：期刊论文

【摘要】：目的研究含碳酸根羟基磷灰石(CHAP)材料的剂量学性能在不同环境条件下的稳定性。方法采用定型压片技术制备剂量计样品,样品经60Coγ线辐照后分别贮存于不同温度、湿度和不同光照背景条件下,采用电子自旋共振(ESR)技术定量分析辐射诱发的自由基。结果在实验观测的3个月内,样品在4℃或室温下保存,信号变化均3%;40℃保存时,信号变化约13%;室温下当湿度36%时,信号变化2%;湿度为76%的高湿度组,信号变化约8%;但高温高湿条件下信号强度并未明显衰减。样品在室温下避光存放1年以上,其信号变化4.8%。平均照度1600 lux条件下,信号变化3.8%;在避光条件下,信号变化3.4%。结论在室温自然环境条件下,该剂量计材料剂量学性能变化不明显,即使较强光照对自由基信号的影响也不显著,长期储存未见信号明显衰减,但高温或高湿环境对样品的测量过程有一定影响,在未来应用中应予以考虑。
[Abstract]:Objective to study the dosimetric properties of hydroxyapatite (CHAP) materials containing carbonates under different environmental conditions. Methods the dosimeter samples were prepared by the stereotype pressing technique, and the samples were stored at different temperatures after 60Co 纬 -ray irradiation. The electron spin resonance (ESR) technique was used to quantitatively analyze radiation-induced free radicals under different background conditions of humidity and light. Results during the three months of experimental observation, the samples were preserved at 4 鈩，

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