【24h】

Potential Energy Surface for the CH4-H-2 van der Waals Interaction

机译:CH4-H-2 van der WALS相互作用的潜在能量表面

获取原文
获取原文并翻译 | 示例
           

摘要

Methane is an ubiquitous molecule, present as a minor component in many environments, including the Earth and planet atmospheres. Its van der Waals interaction with the main gases is an important ingredient for the understanding of radiative properties for those atmospheres. We present here the first precise determination of the interaction between CH4 and H-2. We compute the interaction in an ab initio coupled cluster formalism, with extended atomic bases. We compare a pure CCSD(T) approach to an explicitly correlated CCSD(T)-F12a formalism. The full geometry of scattering two rigid molecules is used, resulting in a potential energy surface depending on 5 degrees of freedom. The long-range part of the ab initio computation is compared with an analytic multipolar expansion. The potential is fit onto a suitable formalism for subsequent scattering dynamics. The potential well is computed at -92.92 cm(-1), an intermediate value if compared with other methane-diatomic molecule interactions.
机译:甲烷是一种普遍存在的分子,作为许多环境中的次要成分,包括地球和行星气氛。它的范德沃尔斯与主要气体的相互作用是了解这些大气的辐射性能的重要成分。我们在这里介绍了CH4和H-2之间相互作用的第一精确测定。我们计算AB Initio耦合集群形式主义中的交互,扩展原子基础。我们将纯CCSD(T)方法与明确相关的CCSD(T)-F12A形式主义进行比较。使用散射两个刚性分子的全几何形状,导致潜在的能量表面取决于5度的自由度。将AB Initio计算的远程部分与分析多极扩展进行比较。潜力适合于适当的形式主义以进行随后的散射动态。与其他甲烷 - 硅藻分子相互作用相比,在-92.92cm(-1)中计算电位阱,中间值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号