Study on Coulomb explosions of ion mixtures
Study on Coulomb explosions of ion mixtures
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DOI：
10.1017/s0022377816000179
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发表时间：
2015-11
影响因子：
2.5
通讯作者：
E. Boella;B. P. Paradisi;A. D’Angola;G. Coppa;L. Silva
中科院分区：
文献类型：
--
作者：
E. Boella;B. P. Paradisi;A. D’Angola;G. Coppa;L. Silva
本文研究了由两种不同离子组成的球形纳米等离子体的库仑爆炸动力学。特别注意已经致力于研究具有较大的电荷质量比的离子的能谱。冲击壳层的形成和离子的能量扩散之间的联系一直是详细分析的对象，表明在特定条件下，渐近能谱的宽度趋于变得非常窄，这导致多值离子相空间。产生准单能离子谱的条件已被严格证明和验证的数值模拟使用的技术，利用球对称的问题，允许一个获得非常准确和精确的结果。
The paper presents a theoretical work on the dynamics of Coulomb explosion for spherical nanoplasmas composed by two different ion species. Particular attention has been dedicated to study the energy spectra of the ions with the larger charge-to-mass ratio. The connection between the formation of shock shells and the energy spread of the ions has been the object of a detailed analysis, showing that under particular conditions the width of the asymptotic energy spectrum tends to become very narrow, which leads to a multi-valued ion phase space. The conditions to generate a quasi-monoenergetic ion spectrum have been rigorously demonstrated and verified by numerical simulations using a technique that, exploiting the spherical symmetry of the problem, allows one to obtain very accurate and precise results.