Determinations of the Products of Electron-Ion Recombinationfor Interstellar Ions

亚当斯博士将使用流动余辉的实验室技术 以产生那些离子的电子-离子等离子体， 星际分子的合成 足够密度的等离子体 以确保这些离子迅速重组， 解离的电子-离子复合， 离子中性反应。 的速率系数， 重组将使用朗缪尔探针确定的情况下， 这些数据在文献中无法获得。 中性 将确定产品及其对产品的贡献 分布将使用光谱技术确定 共振增强多光子 电离，真空紫外吸收光谱，和 发射光谱学 亚当斯博士将获得的数据对于确定 星际气体中分子合成的离子化学途径 云 有了这些数据， 分子合成可以放心使用，这是一个必不可少的 如果对分子排放的天文观测 和假设是用来推导出许多基本的 分子云的性质。 速率数据也是 必要的确定目前的理论的可行性， 重组过程。

Dr. Adams will use the laboratory technique of flowing afterglow to create electron-ion plasmas of those ions which take part in the synthesis of interstellar molecules. Plasmas of sufficient density can be created to ensure that these ions rapidly recombine by dissociative electron-ion recombination before they can undergo further ion-neutral reactions. The rate coefficients for the recombinations will be determined using a Langmuir probe for cases where the data are not available in the literature. The neutral products will be identified and their contribution to the product distribution will be determined using the spectroscopic techniques of laser induced fluorescence, resonance enhanced multi-photon ionization, vacuum ultraviolet absorption spectroscopy, and emission spectroscopy. The data that Dr. Adams will obtain are critical for establishing the ion-chemical routes for molecular synthesis in interstellar gas clouds. With these data, the available theoretical models for molecular synthesis can be used with confidence, an essential requirement if the astronomical observations of molecular emissions and absorptions are to be used to deduce many of the fundamental properties of the molecular clouds. The rate data are also necessary for determining the viability of the current theories of the recombination process.