Atomic charge states in a weakly coupled plasma environment.
Atomic charge states in a weakly coupled plasma environment.
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DOI：
10.1103/physreve.66.026408
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发表时间：
2002-08
期刊：
影响因子：
--
通讯作者：
I. Silanes;J. M. Mercero;J. Ugalde
中科院分区：
文献类型：
--
作者：
I. Silanes;J. M. Mercero;J. Ugalde
本文研究了由汤川型静电屏蔽库仑势所代表的弱束缚等离子体的各种电荷态的相对稳定性随屏蔽程度的增加而变化的规律。预测了在真空中具有正电子亲和力的元素将随着等离子体逆屏蔽长度的增加而经历从阴离子状态到阳离子状态的顺序电子脱离过程。相反，在真空中具有负电子亲和力的元素只呈现两种电荷态，即中性和正电荷态。在小屏蔽时，中性是最稳定的电荷态，随着屏蔽的增加，阳离子发展为最稳定的电荷态。计算并讨论了各跃迁的反屏蔽长度。
The relative stability of various charge states of a number of selected elements has been studied as a function of increasing screening due to a weakly bound plasma represented by the statically screened Coulomb potential of the Yukawa-type. Elements with positive electron affinity in a vacuum are predicted to undergo a sequential electron detachment process from anionic state to the cationic one as the inverse screening length of plasma increases. Conversely, elements with negative electron affinity in a vacuum present only two charge states, neutral and positive. At small screening the neutral is the most stable charge state, and as the screening increases the cation develops as the most stable charge state. Values of the inverse screening length for each of the transitions have been calculated and discussed.