Fusion-Related Ionization and Recombination Data for Tungsten Ions in Low to Moderately High Charge States
Fusion-Related Ionization and Recombination Data for Tungsten Ions in Low to Moderately High Charge States
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作者：
A. Müller
重的多电子原子和离子的碰撞过程和原子结构的细节还没有完全令人满意的理解。为了指导新的理论方法，需要进行实验研究。为了应对聚变相关的对钨原子在所有电荷状态下的碰撞和光谱数据的需求，已经启动了一个项目，其中研究了Wq+离子的电子碰撞和光子诱导电离以及光复合。测量了电离态Q=1~Q=5，电子碰撞电离Q=1至Q=19，电子-离子复合电荷Q=18~Q=21的截面和速率系数。文中提供了一个概述，以及对方法和结果的关键评估。
Collisional processes and details of atomic structure of heavy many-electron atoms and ions are not yet understood in a fully satisfying manner. Experimental studies are required for guiding new theoretical approaches. In response to fusion-related needs for collisional and spectroscopic data on tungsten atoms in all charge states, a project has been initiated in which electron-impact and photon-induced ionization as well as photorecombination of Wq+ ions are studied. Cross sections and rate coefficients were determined for charge states q ranging from q = 1 to q = 5 for photoionization, for q = 1 up to q = 19 for electron-impact ionization and for q = 18 to q = 21 for electron-ion recombination. An overview, together with a critical assessment of the methods and results is provided.