| Study on spectroscopic parameters and molecular constants of HCl(X~1Σ~+) molecule by using multireference configuration interaction approach |
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| 引用本文： | 张小妞,施德恒,张金平,朱遵略,孙金锋.Study on spectroscopic parameters and molecular constants of HCl(X~1Σ~+) molecule by using multireference configuration interaction approach[J].中国物理 B,2010,19(5):53401-053401. |
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| 作者姓名： | 张小妞 施德恒 张金平 朱遵略 孙金锋 |
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| 作者单位： | College of Physics and Information Engineering, Henan Normal University,
Xinxiang 453007, China;College of Physics and Information Engineering, Henan Normal University,
Xinxiang 453007, China;College of Physics and Information Engineering, Henan Normal University,
Xinxiang 453007, China;College of Physics and Information Engineering, Henan Normal University,
Xinxiang 453007, China;College of Physics and Information Engineering, Henan Normal University,
Xinxiang 453007, China |
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| 基金项目： | Project supported by the National
Natural Science Foundation of China (Grant No. 10874064), and the
Program for Science and Technology Innovation Talents in
Universities of Henan Province, China (Grant No. 2008HASTIT008). |
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| 摘 要： | Equilibrium internuclear separations,harmonic frequencies and potential energy curves(PECs) of HCl(X1Σ+) molecule are investigated by using the highly accurate valence internally contracted multireference configuration interaction(MRCI) approach in combination with a series of correlation-consistent basis sets in the valence range.The PECs are all fitted to the Murrell-Sorbie function,and they are used to accurately derive the spectroscopic parameters(De,D0,ωeχe,αe and Be).Compared with the available measurements,the PEC obtained at the basis set,aug-cc-pV5Z,is selected to investigate the vibrational manifolds.The constants D0,De,Re,ωe,ωeχe,αe and Be at this basis set are 4.4006 eV,4.5845 eV,0.12757 nm,2993.33 cm 1,52.6273 cm 1,0.2981 cm 1 and 10.5841 cm 1,respectively,which almost perfectly conform to the available experimental results.With the potential determined at the MRCI/aug-cc-pV5Z level of theory,by numerically solving the radial Schro¨dinger equation of nuclear motion in the adiabatic approximation,a total of 21 vibrational levels are predicted.Complete vibrational levels,classical turning points,inertial rotation and centrifugal distortion constants are reproduced,which are in excellent agreement with the available Rydberg-Klein-Rees data.Most of these theoretical vibrational manifolds are reported for the first time to the best of our knowledge.
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| 关 键 词： | dissociation energy spectroscopic parameter vibrational level inertial rotation constant |
| 收稿时间： | 2009-09-15 |
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