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

[129286 . thiemens]这个为期两年的大气化学论文强化项目是美国-法国合作的一部分，由加州大学圣地亚哥分校和法国格勒诺布尔约瑟夫傅立叶大学的研究小组合作。Greg Michalski是Mark H. Thiemens的研究生，他将在格勒诺布尔物理光谱实验室的Remy Jost的监督下进行光谱研究。合作的目的是利用光谱分析NO2同位素的质量无关分馏（MIF）机制的调查。协作需要合成NO2的对称和不对称同位素体。Michalski先生将对用整数和半核自旋的同位素取代中心氮原子的同位素进行光谱分析。探测低于解离阈值的状态将使用腔衰荡光谱来完成。米哈尔斯基还将接受训练，学会使用标准二氧化氮操作法国激光系统和膨胀射流。美国团队为这次合作带来了同位素合成方面的专业知识。这与法国在光谱测量方面的专业知识相辅相成。由此产生的数据将为一个完整的定量理论提供基础，以解释行星大气、地质记录和陨石中的MIF。这种合作也有助于研究和教育基础设施。研究生将受益于法国专业设备的高级培训和参与国际团队的努力。该奖项代表了美国方面对NSF和CNRS的平行提案。NSF将支付美国研究生的旅费和生活费。法国研究中心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.