Multi-component molecular orbital study on positron attachment to alkali-metal hydride molecules: nature of chemical bonding and dissociation limits of [LiH; e+]
Multi-component molecular orbital study on positron attachment to alkali-metal hydride molecules: nature of chemical bonding and dissociation limits of [LiH; e+]
复制标题
正电子与碱金属氢化物分子附着的多组分分子轨道研究:化学键的性质和[LiH;解离极限]
DOI:
10.1140/epjd/e2014-40708-4
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
T. Oyamada and M. Tachikawa
中科院分区:
文献类型:
--
作者:
Yurika Yamada;Yukiumi Kita;and Masanori Tachikawa;T. Oyamada and M. Tachikawa
We have performed multi-component full-configuration interaction calculations to investigate the nature of chemical bonding of [LiH;e+] at the small and large internuclear distance. We discuss the importance of geometrical changes in positronic compounds induced by a positron attachment in terms of the virial theorem, with a comparison of the adiabatic- and vertical-positron affinity (PA). The systematic improvement of the PA values achieved by optimisation of (i) the molecular geometry and (ii) the positronic basis centre is also discussed. The stable dissociation channel of [LiH;e+] is compared with the ionic- and neutral-dissociation channels of its parent molecule LiH through the analysis of the potential energy curve and the electronic and positronic densities. The vertical PA as a function of is also presented, which is the difference between the potential energy curve of the parent molecule (LiH → Li + H) and its positronic compound ([LiH; e+] → Li + [H; e+]). Unlike the preceding study of [M. Mella et al., J. Chem. Phys.113, 6154 (2000)], it took more than bohr to converge the vertical PA due to the long-range ionic bonding interaction.
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DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
影响因子:
4.4
作者:
P. E. Cade;W. Huo
通讯作者:
W. Huo
DOI:
10.1088/0022-3700/11/16/001
发表时间:
1978
期刊:
Journal of Physics B
影响因子:
--
作者:
H. Kurtz;K. Jordan
通讯作者:
K. Jordan
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
K. Strasburger
通讯作者:
K. Strasburger
影响因子:
8.6
作者:
Danielson, J. R.;Jones, A. C. L.;Surko, C. M.
通讯作者:
Surko, C. M.