Int. J. Mol. Sci. 2012, 13(2), 2501-2514; doi:10.3390/ijms13022501
Article

Spectroscopic Parameter and Molecular Constant Investigations on Low-Lying States of BeF Radical

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Received: 12 December 2011; in revised form: 3 February 2012 / Accepted: 9 February 2012 / Published: 22 February 2012
(This article belongs to the Special Issue Advances in Molecular Electronic Structure Calculations)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The potential energy curves (PECs) of X2Σ+, A2Πr and B2Σ+ states of BeF radical have been investigated using the complete active space self-consistent-field (CASSCF) method, followed by the highly accurate valence internally contracted multireference configuration interaction (MRCI) approach at the correlation-consistent basis sets, cc-pV5Z for Be and aug-cc-pV6Z for F. Based on the PECs of X2Σ+, A2Πr and B2Σ+ states, the spectroscopic parameters (De, Re, ωe, ωeχe, αe and Be) have also been determined in the present work. With the PECs determined at the present level of theory, vibrational states have been predicted for each state when the rotational quantum number J equals zero (J = 0). The vibrational levels, inertial rotation and centrifugal distortion constants are determined for the three states, and the classical turning points are also calculated for the X2Σ+ state. Compared with the available experiments and other theories, it can be seen that the present spectroscopic parameter and molecular constant results are more fully in agreement with the experimental findings.
Keywords: potential energy curve; dissociation energy; spectroscopic constant; molecular constant
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MDPI and ACS Style

Zhu, Z.L.; Song, Q.P.; Kou, S.H.; Lang, J.H.; Sun, J.F. Spectroscopic Parameter and Molecular Constant Investigations on Low-Lying States of BeF Radical. Int. J. Mol. Sci. 2012, 13, 2501-2514.

AMA Style

Zhu ZL, Song QP, Kou SH, Lang JH, Sun JF. Spectroscopic Parameter and Molecular Constant Investigations on Low-Lying States of BeF Radical. International Journal of Molecular Sciences. 2012; 13(2):2501-2514.

Chicago/Turabian Style

Zhu, Zun Lue; Song, Qing Peng; Kou, Su Hua; Lang, Jian Hua; Sun, Jin Feng. 2012. "Spectroscopic Parameter and Molecular Constant Investigations on Low-Lying States of BeF Radical." Int. J. Mol. Sci. 13, no. 2: 2501-2514.

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