Positron-attachment to acetonitrile, acetaldehyde, and acetone molecules: Vibrational enhancement of positron affinities with configuration interaction level of multi-component molecular orbital approach

Positron-attachment to acetonitrile, acetaldehyde, and acetone molecules: Vibrational enhancement of positron affinities with configuration interaction level of multi-component molecular orbital approach
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乙腈、乙醛和丙酮分子的正电子附着:正电子亲和力的振动增强与多组分分子轨道方法的构型相互作用水平

DOI:
10.1088/1742-6596/488/1/012053
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发表时间:
2014
期刊:
J. Phys.: Conf. Ser.
影响因子:
--
通讯作者:
M. Tachikawa
M. Tachikawa
中科院分区:
--
文献类型:
--
作者:
T. Udagawa;T. Ishimoto;and M. Tachikawa;M. Tachikawa

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To theoretically demonstrate the binding of a positron to acetonitrile, acetaldehyde, and acetone molecules, we have calculated the vibrational averaged positron affinity (PA) values along the local CN or CO vibrational contribution with the configuration interaction level of multi-component molecular orbital method. This method can take the electron-positron correlation contribution into account through single electronic–single positronic excitation configurations. The PA values are enhanced by including the local vibrational contribution from vertical PA values due to the anharmonicity of the potential. For acetonitrile, acetaldehyde, and acetone molecules, the PA values after averaging over the 1st vibrational state are 136, 55, and 96 meV, which can be compared with the corresponding experimental vlues of 180, 90, and 173 meV, respectively.
M.Tachikawa:“通过全 CI 波函数同时优化电子和正电子的高斯型函数指数 - 应用多组分分子轨道方法应用于正电子化合物的基态和激发态”化学物理
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