【作者】 胡睿； 江阔； 熊晓玲； 张会； 罗顺忠；

【Author】 HU Rui;JIANG Kuo;XIONG Xiao-ling;ZHANG Hui;LUO Shun-zhong;Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics;Southwest Science and Technology University;

【机构】 中国工程物理研究院核物理与化学研究所； 西南科技大学；

【摘要】 对于平面锶-90的制备,陶瓷法是最主要的传统制源工艺。其中,基体材料主要采用两种,一种是含成膜剂的氧化钛,一种是以二氧化硅为主要成分的陶瓷面釉。但是,这两种制备方式都不甚理想,主要表现为工艺繁琐、均匀性欠缺以及射线浪费多等问题。为了探索一种相对简捷、锶-90射线利用率高的面源制备新工艺,我们认为,需要寻找新的固化介质作为锶-90同位素的载体。本文以锶-90衰变产生的终端同位素Zr-90作为锶元素的自固化介质元素,采用原位反应法制备了锆酸锶自铺展薄膜源,整个工艺用锶-90的稳定同位素锶-88进行模拟,先后选取了单晶硅、抛光氧化锆多晶作为基体材料,获得了圆形自铺展复合锶冷源。在本自铺展溶液的配方体系中,氧化锆、聚乙二醇以及助剂M起着重要作用。其中,M作为稳定剂,用于将形成SrZrO₃之后多余的Zr元素形成固溶体,从而使Zr成为全稳定结构,避免了因氧化锆晶型转变所造成的烧结制品出现裂纹的问题;聚乙二醇在体系中起到降低液珠表面张力、促使成膜的作用,它的加入可以有助于获取规整的圆形薄膜。更多还原

【Abstract】 Plane strontium-90 β-ray sources are widely prepared by ceramic methods traditionally.Thereinto,the carrier materials mostly adopt the two substances.One is TiO₂ containing a reagent of help to become films;another is a kind of surface ceramic glaze with SiO₂.However,the above preparation methods are neither ideal for the reasons of complicated craftworks,lower uniformity and more wasted-radials.For exploring a sort of relatively simple and taller using rate of radials from strontium-90,we need search a new solidify medium to become the carrier of strontium-90.We elected the zirconium-90 which given birth from the strontium-90’s disintegration as its solidify medium,and prepared the strontium zirconate self-spreading films by in-situ reation.Strontium-88 isotope was used to simulate the whole craftwork.The circle self-spreading nonradioactive sources were gained on silicon and polishing zirconia respectively.Zirconia,reagent M and polyglycol played important roles in our prescription.M acted as a stabilizer to make redundant zirconate form a solid solution,and then these zirconate became a steady configuration.So the flaw which was brought from the change of zirconate crystal type on the sinter would be escaped.The last could reduce the surface tension of bead and promote the form of films.Also the existence of polyglycol was helpful to catch regularly circular membranes.更多还原