Theoretical Studies of Interstellar Matter

9531790 Dalgarno博士将指导x射线主导的空间区域的理论研究，目的是确定可能区分x射线电离区域和宇宙射线电离区域的特定诊断探针。将计算氢分子的红外响应作为密度的函数。将探索早期宇宙中氘化分子的化学性质。星周壳的分子组成将使用精细的辐射转移处理进行检查。将特别注意目前的模型丰度与IRC+10216中测量到的中性碳原子丰度之间的差异。完成氢分子与氢碰撞时转振跃迁速率系数的半经典计算，启动低温所需的量子计算。将研究单带电物质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. ***