Strong chemical bond of stable He2 in strong linearly polarized laser fields
Strong chemical bond of stable He2 in strong linearly polarized laser fields
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DOI：
10.1103/physreva.85.032516
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发表时间：
2012-03-21
影响因子：
2.9
通讯作者：
Moiseyev, Nimrod
中科院分区：
文献类型：
--
作者：
Balanarayan, P.;Moiseyev, Nimrod
氦二聚体的范德华配合物的结合能约为10(-7)eV，键距约为52埃。我们的从头算电子结构计算表明，在约5.614 x 10(19) W/cm(2)的高光子能量（约108 eV）的交流电场中，产生了稳定的He-2分子，其结合能为12.5 eV，比传统分子氢键强得多。强激光场对He-2产生的化学键距离为2.01埃。He-2化学键的强度反映在超过4500个旋转振动束缚态中。像其他双原子分子一样，强束缚的He-2被线性极化场排列。然而，研究表明，光作用下He-2分子的排列机制与实际分子的排列机制不同。我们的研究结果表明，在强电磁辐射的存在下，可能会产生不寻常的化学物质，也许会产生与我们今天所知道的不同的化学反应。
The van der Waals complex of the helium dimer has a binding energy of similar to 10(-7) eV and a bond distance of similar to 52 angstrom. Our ab initio electronic structure calculations show that in an ac electric field of approximate to 5.614 x 10(19) W/cm(2) with a high photon energy (approximate to 108 eV), stable He-2 molecules with a binding energy of 12.5 eV, which are much stronger than conventional molecular hydrogen bonds, are produced. The chemical bond distance of He-2 produced by the strong laser field is equal to 2.01 angstrom. The strength of the chemical bond of He-2 is reflected in more than 4500 rovibrational bound states. The strongly bound He-2 is aligned by the linear polarized field, like in other diatomic molecules. However, it is shown that the mechanism of the alignment of the He-2 molecule produced by light differs from the usual alignment mechanism of real molecules. Our results indicate the possibility of producing unusual chemical species, and perhaps chemical reactions that differ from what we know today, in the presence of strong electromagnetic radiation.