Catalyzing new international collaboration. US-Taiwan collaboration of experimental and theoretical study of rovibrational spectra of small hydrogen-containing molecules and ions.

我们对天文世界的大部分知识都来自原子和分子对电磁辐射的发射、吸收和散射。在恒星大气的研究中，原子和分子光谱（包括跃迁能量、强度和光偏振）的天文观测，以及实验室实验和理论计算是必不可少的。该CNIC提案的目标是促进亚利桑那大学（美国）化学和生物化学系Ludwik Adamowicz教授和物理系Jow-Tsong Shy教授之间的国际跨学科合作，国立清华大学（台湾）进行非常精确的实验和理论研究的旋转振动（rovib）光谱的小氢-含有分子和簇。这些系统构成了宇宙质量的重要部分，是星际化学的关键。这项合作的目标是表征和分配所研究的分子系统的热振动光谱。所获得的数据可以非常有助于识别望远镜记录的光谱线，并将这些线分配给特定的分子和团簇。因此，将获得有关宇宙中各个领域的组成以及那里发生的化学的知识。这种合作将具有非常不同研究背景的团体聚集在一起。台湾小组一直致力于中性和带电小分子系统的高精度实验光谱学研究。亚利桑那理论化学小组一直致力于发展和应用非常精确的量子力学方法来计算小原子和分子的光谱。这两个小组都在各自的领域取得了成就。本项目将理论与实验相结合，对氢及其同位素分子和团簇的光谱进行解析。这些研究本质上是非常基础的，因此它们非常适合NSF资助。

The majority of our knowledge of the astronomical world is derived from the emission, absorption,and scattering of electromagnetic radiation from atoms and molecules. The astronomical observationsof atomic and molecular spectra including transition energies, intensities, and light polarizationcomplemented with laboratory experiments and theoretical calculations are essential in the study ofstellar atmospheres. The goal of this CNIC proposal is to catalyze an international interdisciplinarycollaboration between the group of Prof. Ludwik Adamowicz, at the Department of Chemistryand Biochemistry, the University of Arizona (USA) and Prof. Jow-Tsong Shy, at the Departmentof Physics, the National Tsing Hua University (Taiwan) on performing very accurate experimentaland theoretical studies of the rovibrational (rovib) spectra of small hydrogen-containing moleculesand clusters. These systems constitute a significant portion of the mass of the universe and arekey to the interstellar chemistry. The goal of this collaborative is to characterize and assign therovibrational spectra of the studied molecular systems. The obtained data can be very helpful inidentifying spectral lines recorded by telescopes and assigning these lines to particular molecules andclusters. As a result, knowledge will be gained about the compositions of various domains in theuniverse and about chemistry occurring there.This collaboration brings together groups with very different research profiles. The Taiwangroup has been concerned with high-precision experimental spectroscopy studies of small neutral andcharged molecular systems. The theoretical-chemistry Arizona group has been involved in developmentand application of very accurate quantum-mechanical methods for calculating spectra of small atomsand molecules. Both groups are accomplished in their respective fields. In this project, the theoryand the experiment will be combined in elucidation of the spectra of molecules and clusters involvinghydrogen and its isotopes. The studies are very fundamental in nature and as such they are wellsuited for NSF funding.