物理化学学报 >> 2016, Vol. 32 >> Issue (4): 1012-1018.doi: 10.3866/PKU.WHXB201601045

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琼脂糖基类丁二炔凝胶剂量计的辐照响应行为

陈建1,王潇1,2,李磊1,曾光1,孙鹏3,黄玮1,*()   

  1. 1 中国工程物理研究院核物理与化学研究所, 四川绵阳 621900
    2 中国工程物理研究院机械制造工艺研究所, 四川绵阳 621900
    3 四川大学原子核科学技术研究所, 成都 610064
  • 收稿日期:2015-09-28 发布日期:2016-04-07
  • 通讯作者: 黄玮 E-mail:huangwei839@126.com
  • 基金资助:
    中国工程物理研究院科学技术发展基金(2013B0301035);国家自然科学基金(81301934)

Radiation Response Behavior of a Diacetylene/Agarose Gel Dosimeter

Jian CHEN1,Xiao WANG1,2,Lei LI1,Guang ZENG1,Peng SUN3,Wei HUANG1,*()   

  1. 1 Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, P. R. China
    2 Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, P. R. China
    3 Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, P. R. China
  • Received:2015-09-28 Published:2016-04-07
  • Contact: Wei HUANG E-mail:huangwei839@126.com
  • Supported by:
    the Science and Technology Development Foundation of China Academy of Engineering Physics(2013B0301035);National Natural Science Foundation of China(81301934)

摘要:

将类丁二炔(10, 12-二十五碳二炔酸)囊泡固载于琼脂糖凝胶制备出了新型辐射变色凝胶复合凝胶材料。利用γ射线辐照研究了所制备凝胶的辐照响应行为,结果显示:当γ辐射剂量在500-2000 Gy内,随着剂量增加,凝胶由无色逐渐变为蓝色,颜色不断加深,采用紫外-可见光分光光度计测试其吸收光谱,发现其主要吸收峰值在660 nm附近,且辐照前后凝胶的吸光度差值与剂量有良好线性关系(相关系数R2 =0.9942)。进一步研究表明:所制备的凝胶材料对γ射线和电子束辐照有相同的剂量响应,且无明显的能量和剂量率依赖性;凝胶的辐射后效应较弱,辐照后24 h,吸光度基本恒定;分次辐照对凝胶剂量计准确性的影响极小;凝胶在0-30℃范围内的响应性基本保持稳定;在辐照后48 h内,并未观察到囊泡有明显扩散效应,显示出良好的稳定性。此外,琼脂糖具有价廉、无毒且易制备为任意形状凝胶的优点,因此该凝胶剂量计有望应用于真实场景的三维剂量分布测定。

关键词: 琼脂糖凝胶, 丁二炔囊泡, 辐射响应, 辐射变色

Abstract:

A new diacetylene/agarose gel dosimeter composed of agarose gel as the carrier and diacetylene (10, 12-pentacosadiynoic acid) vesicles as the radiochromic agent was prepared and its response behavior to γ-radiation was studied. Ultraviolet-visible spectra showed that the main absorption peak was around 660 nm, and there was a distinct linear relationship (correlation coefficient R2 = 0.9942) between the absorbed dose and absorbance at 660 nm over the absorbed dose range from 500 to 2000 Gy. The diacetylene/agarose gel dosimeter exhibited the same dose response to γ-radiation and an electron beam without energy and dose rate dependency. Furthermore, the effects of temperature, diffusion, fractionated irradiation, and post-radiation on the dosimeter response were carefully investigated. The developed diacetylene/agarose gel dosimeter shows promise to measure the three-dimensional space dose within the range of 500-2000 Gy.

Key words: Agarose gel, Diacetylene vesicle, Radiation response, Radiochromic

MSC2000: 

  • O644