Ortner A, Frank A, Blažević A, Roth M
Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany.
Helmholtz-Institut Jena, Fröbelstieg 3, 07743 Jena, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Feb;91(2):023104. doi: 10.1103/PhysRevE.91.023104. Epub 2015 Feb 19.
In this paper we investigate the influence of the plasma properties on the charge state distribution of a swift heavy ion beam interacting with a plasma. The main finding is that the charge state in plasma can be lower than in cold matter. The charge state distribution is determined by the ionization and recombination rates which are balancing each other out. Both, ionization and recombination rates, as well as atomic excitation and decay rates, depend on the plasma parameters in different ways. These effects have been theoretically studied by Monte Carlo simulations on the example of an argon ion beam at an energy of 4MeV/u in a carbon plasma. This study covers a plasma parameter space ranging from ion densities from 10(18) to 10(23) cm(-3) and electron temperatures from 10 to 200 eV.
在本文中，我们研究了等离子体特性对与等离子体相互作用的快速重离子束电荷态分布的影响。主要发现是等离子体中的电荷态可能低于冷物质中的电荷态。电荷态分布由相互平衡的电离和复合率决定。电离率和复合率以及原子激发和衰变率都以不同方式依赖于等离子体参数。这些效应已通过以4MeV/u能量的氩离子束在碳等离子体中的例子进行的蒙特卡罗模拟进行了理论研究。这项研究涵盖了离子密度从10(18)到10(23) cm(-3)以及电子温度从10到200eV的等离子体参数空间。
