用激光诱导产生^1O2的正电子湮没研究  

Positron annihilation study of singlet oxygen o induced by laser

作　　者：王蕴玉[1] 张仁武[1] 郭应焕[1] 杨巨华[1] 

机构地区：[1]中国科学院高能物理研究所,中国科学院核分析技术联合开放研究实验室

出　　处：《核技术》1998年第2期74-78,共5页Nuclear Techniques

基　　金：国家自然科学基金

摘　　要：用正电子素ｏ－Ｐｓ研究以亚甲兰为光敏剂在甲酸和水体系中激光诱导单态氧￣１Ｏ＿２的形成。理论推导了ｏ－Ｐｓ湮没率的改变与亚甲兰浓度之间的关系。The singlet oxygen O induced by laser in a methanol- water system with photosensitizer, methylene blue (MB), was probed by positronium. According to the theory of positron annihilation and chemical reaction kinetics , the relation between concentration of MB and variation of positron annihilation rate caused by , was deduced. The experimental results agree with the theory, confirming the formation of 1O2 in such a photochemical reaction.

关 键 词：正电子素 激光诱导 单态氧 光敏剂 亚甲兰 

分 类 号：O613.3[理学—无机化学]