| 报告题目 | Atom Trap, Krypton-81, and Global Groundwater |
| 报告人 | 卢征天教授 |
| 报告人单位 | 美国Argonne国家实验室 |
| 报告时间 | 2012-05-11 |
| 报告地点 | 合肥微尺度物质科学国家实验室一楼科技展厅 |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | 报告人简介：
卢征天，我校82级少年班校友，先后在芝加哥大学和柏克利加州大学获得硕士、博士学位，现为美国Argonne国家实验室高级科学家、芝加哥大学物理系教授，美国物理学会APS Fellow。曾获得美国“青年科学家总统奖”和美国能源部青年科学家与工程师奖。 Abstract： The long-lived noble-gas isotope 81Kr is the ideal tracer for old water and ice in the age range of 105 – 106 years, a range beyond the reach of 14C. 81Kr-dating, a concept pursued over the past four decades by numerous laboratories employing a variety of techniques, is now available for the first time to the earth science community at large. This is made possible by the development of an atom counter based on the Atom Trap Trace Analysis (ATTA) method, in which individual atoms of the desired isotope are selectively captured and detected with a laser-based atom trap. ATTA possesses superior selectivity, and is thus far used to analyze the environmental radioactive isotopes 81Kr, 85Kr, and 39Ar, These three isotopes have extremely low isotopic abundances in the range of 10-16 to 10-11, and cover a wide range of ages and applications. In collaboration with earth scientists, we are dating groundwater and mapping its flow in major aquifers around the world. |
