U.S.-France Dissertation Enhancement: Variations in Dissociation Energies and Rates for Multiple NO2

这个为期两年的大气化学学位论文增强项目奖项是美国加州大学圣地亚哥分校和法国格勒诺布尔约瑟夫·傅里叶大学研究小组合作的一部分。马克·H·蒂门斯的研究生格雷格·米哈尔斯基将在格勒诺布尔物理光谱实验室的雷米·约斯特的监督下进行光谱研究。该合作的目标是使用NO2同位素的光谱分析来研究质量非依赖分馏(MIF)机制。这种合作需要合成NO2的对称和不对称同位素异构体。米哈尔斯基将对同位素异构体进行光谱分析，用具有整数和半核自旋的同位素取代中心氮原子。低于离解阈值的探测态将使用腔衰荡光谱来完成。米哈尔斯基还将接受使用标准NO2操作法国激光系统和扩张喷气式飞机的培训。美国团队将同位素合成方面的专业知识带到了这次合作中。这一点得到了法国在光谱测量方面的专业知识的补充。所得数据将为解释行星大气、地质记录和陨石中MIF的完整和定量理论提供基础。合作还为研究和教育基础设施做出了贡献。这名研究生将通过在法国接受专业设备的高级培训和参与国际团队的努力而受益。这一奖项代表了美国方面对NSF和CNRS的平行提议。NSF将为这位美国研究生支付旅费和生活费。CNRS将支持法国研究人员和学生访问美国。

0129286ThiemensThis two-year award for a dissertation enhancement program in atmospheric chemistry is part of a US-France collaboration between the University of California, San Diego, and research group at the University Joseph Fourier in Grenoble, France. Greg Michalski, a graduate student of Mark H. Thiemens, will carry out spectroscopic studies under the supervision of Remy Jost at the Physical Spectrometry Laboratory in Grenoble. The objectives of the collaboration are investigations of mass independent fractionation (MIF) mechanisms using spectroscopic analysis of NO2 isotopomers. The collaboration requires the synthesis of symmetric and asymmetric isotopomers of NO2. Mr. Michalski will carry out the spectroscopy on the isotopomers substituting the central nitrogen atom with isotopes with integer and half-nuclear spins. Probing states below the dissociation threshold will be done using Cavity Ringdown Spectroscopy. Mr. Michalski will also be trained to operate the French laser systems and the expansion jet using standard NO2. The US team brings to this collaboration expertise in isotopomer synthesis. This is complemented by French expertise in spectroscopic measurements. The resulting data will provide a basis for a complete and quantitative theory to explain MIF in planetary atmospheres, the geologic record and in meteorites. The collaboration contributes as well to research and education infrastructure. The graduate student will benefit through advanced training on specialized equipment in France and participation in an international team effort. This award represents the US side of parallel proposals to the NSF and the CNRS. NSF will cover travel funds and living expenses for the US graduate student. The CNRS will support visits by French researchers and students to the United States.