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Chinese Physics, 2003, Vol. 12(11): 1218-1224    DOI: 10.1088/1009-1963/12/11/306
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

The characteristics of doubly and triply charged ions C2+2, C2-2 and C3+2

Zhu Zheng-He (朱正和), Wang Rong (汪蓉)
Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
Abstract  Based on group theory and atomic and molecular reaction statics, this paper derives the possible electronic states of C$^{2+}_2$, C$^{2-}_2$ and C$^{3+}_2$, and their reasonable dissociation limits and determines their ground electronic states C$^{2+}_2(X^3\Sigma_{\rm u})$, C$^{2-}_2(X^1\Sigma^+_{\rm g}$) and C$^{3+}_2(X^4\Sigma^-_{\rm u})$ using quantum mechanical calculations at the level of QCISD/6-311G$^*$. All the potential energy curves of their ground states have both a minimum and a maximum, which are the so-called "energy trapped" molecules. This sort of potential maximum is chiefly due to Coulomb repulsion. We propose the perturbation effect of ionic charges, which is used to explain why the orbital degeneracy of diatomic ions may be removed. The characteristics of potential curves for diatomic ions are briefly described.
Keywords:  C$_2$ ions      electronic states      potential energy function  
Received:  15 January 2003      Revised:  26 May 2003      Accepted manuscript online: 
PACS:  31.15.xp (Perturbation theory)  
  31.15.Hz  
  31.15.Ar  
  31.50.Bc (Potential energy surfaces for ground electronic states)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 19974026).

Cite this article: 

Zhu Zheng-He (朱正和), Wang Rong (汪蓉) The characteristics of doubly and triply charged ions C2+2, C2-2 and C3+2 2003 Chinese Physics 12 1218

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