Molecular dynamics simulations of anisotropic explosions of small hydrogen clusters in intense laser pulses
Molecular dynamics simulations of anisotropic explosions of small hydrogen clusters in intense laser pulses
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DOI：
10.1088/0953-4075/48/3/035601
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发表时间：
2015-02
期刊：
影响因子：
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通讯作者：
Rong Cheng;Chunyan Zhang;L. Fu;Jie Liu
中科院分区：
文献类型：
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作者：
Rong Cheng;Chunyan Zhang;L. Fu;Jie Liu
用经典分子动力学模拟方法研究了强飞秒红外激光脉冲辐照下小氢团簇的爆炸动力学。我们在这些爆炸中发现了空间各向异性，质子能量沿激光偏振方向增强。我们的模拟可以确定这种各向异性的来源：团簇电离早期的空间电荷分离和团簇爆炸期间重新散射的电子和质子之间的库仑吸引之间的相互作用。
The explosion dynamics of small hydrogen clusters irradiated by intense femtosecond infrared laser pulses is investigated by classical molecular dynamics simulations. We find a spatial anisotropy in these explosions with proton energies enhanced along the laser polarization direction. Our simulations can identify the origin of this anisotropy: the interplay between the space charge separation in the early stage of cluster ionization and the Coulomb attraction between the rescattered electrons and protons during cluster explosion.