时间：2016年3月11日（周五）下午15:00

地点：邵科馆一楼接待室

特邀嘉宾：加拿大萨斯喀彻温大学Pan Yuanming教授

主题：Pan Yuanming教授将作题为“EPR and First-Principles Studies of Radiation-Induced Defects in Crystalline Silica”的学术报告，并与各位老师展开交流，争取合作机会。

Pan Yuanming教授简介：

Yuanming Pan教授1985年本科毕业于武汉地质学院（现中国地质大学），1986年接受国家教育部奖学金资助前往加拿大西安大略大学攻读地质学博士，并与1990年取得博士学位。博士毕业后在西安大略大学接着做了3年的博士后研究。1993年他在萨斯喀彻温大学取得教职，并于2002年正式升任教授。Yuanming Pan教授在地质和矿物材料的研究领域开展了多年的研究，共发表SCI论文160余篇。研究专长包括电子顺磁共振(EPR)等同步辐射光谱和第一性原理计算。现为加拿大地质协会会士，美国矿物协会会员，加拿大矿物协会会员和国际电子顺磁共振学会会员等。

论坛报告主题简述：

Crystalline silica or α quartz is an important material for traditional industries as well as high-tech electronic, optical, solar-energy and quantum memory applications. Many of these applications either require the material be resistant to the exposure of radiation or directly make use of specific radiation-induced point defects. The most common radiation point defects in crystalline quartz and amorphous silica are those associated with oxygen vacancies (so called E' centers with electron spin S=1/2 and E'' with S=1). Interaction of two E' centers results in E'' centers and among these triplet centers stand out as being unstable or stable at room temperature. The E'' centers are characterized by hyperfine interactions (HFI) with two 29Si nuclei and these HF values may be either about half or full integer of that values for the E'1 center in dependence on the exchange interaction between two centers. Information about radiation-induced defects in crystalline silica also provides insights into similar defects in other silica based materials.