Preparation of novel polymer gel dosimeters based on a radiation-crosslinked gel

以甲基丙烯酸2-羟乙基（HEMA）和聚乙二醇二甲基丙烯酸酯（9G）为毒性较低的单体，四甲基（羟甲基）氯化磷（THPC）为抗氧化剂，制备了基于辐射交联羟丙基纤维素（HPC）凝胶的聚合物凝胶剂量计。聚合物凝胶剂量计在60Co &#61543；-射线照射1 Gy时显示混浊，当剂量达到10 Gy时，混浊随剂量近似线性增加。在相同剂量下，云量随9G浓度的增加而增加。结果表明，剂量效应与HEMA、9G和THPC的组成比例有关。

Polymer gel dosimeters based on radiation-crosslinked hydroxypropyl cellulose (HPC) gel were prepared, which comprised 2-hydroxyethyl methacrylate (HEMA) and polyethylene glycol dimethacrylate (9G) as less toxic monomers and tetrakis (hydroxylmethyl) phosphonium chloride (THPC) as an antioxidant. The polymer gel dosimeters showed cloudiness at only 1 Gy by exposing to 60Co -ray, in which the cloudiness increased approximately linearly with the dose up to 10 Gy. At the same dose, the increase in the cloudiness appeared with increasing concentration of 9G. It was found that the dose response depended on the composition ratio between HEMA, 9G and THPC.