Theoretical Studies of Interstellar Matter

9531790达尔加诺博士将指导X射线主导的空间区域的理论研究，目的是确定可以区分X射线和宇宙射线电离区域的特定诊断探测器。我们将计算分子氢的红外响应随密度的变化。我们将探索早期宇宙中的氚分子物种的化学。将使用辐射传输的精细化处理来检查恒星周壳的分子组成。将特别注意本模型丰度与IRC+10216中中性碳原子测量丰度之间的差异。将完成分子氢与氢碰撞的振转跃迁速率系数的半经典计算，并开始进行低温所需的量子计算。我们将研究单电荷物种与中性原子相互作用的电荷转移碰撞。***

9531790 Dalgarno Dr. Dalgarno will direct theoretical studies of X-ray dominated regions of space with the intent of identifying specific diagnostic probes that may distinguish between regions ionized by X-rays and by cosmic rays. The infrared response of molecular hydrogen as a function of density will be calculated. The chemistry of deuterated molecular species in the early Universe will be explored. The molecular composition of circumstellar shells will be examined using a refined treatment of radiative transfer. Particular attention will be given to the discrepancy between the present model abundance and the measured abundance of neutral carbon atoms in IRC+10216. Semiclassical calculations of rate coefficients of rovibrational transitions of molecular hydrogen in collision with H will be completed and quantal calculations required for low temperatures will be initiated. Charge transfer collisions of singly charged species interacting with neutral atoms will be studied. ***