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Calculated Rotational and Vibrational g Factors of LiH X (1)Sigma(+) and Evaluation of Parameters in Radial Functions from Rotational and Vibration-Rotational Spectra
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SYSNO ASEP 0437114 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Calculated Rotational and Vibrational g Factors of LiH X (1)Sigma(+) and Evaluation of Parameters in Radial Functions from Rotational and Vibration-Rotational Spectra Author(s) Sauer, S. P. A. (DK)
Paidarová, Ivana (UFCH-W) RID, ORCID
Oddershede, J. (DK)
Bak, K. L. (DK)
Ogilvie, J. F. (CA)Source Title International Journal of Quantum Chemistry. - : Wiley - ISSN 0020-7608
Roč. 111, č. 4 (2011), s. 736-752Number of pages 17 s. Language eng - English Country US - United States Keywords LiH ; nonadiabatic reduced mass ; rotational g factor Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects IAA401870702 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000286684300002 EID SCOPUS 78650587314 DOI 10.1002/qua.22666 Annotation The vibrational g factor, that is, the nonadiabatic correction to the vibrational reduced mass, of LiH has been calculated for internuclear distances over a wide range. Based on multiconfigurational wave functions with a large complete active space and an extended set of gaussian type basis functions, these calculations yielded also the rotational g factor, the electric dipolar moment, and its gradient with internuclear distance for LiH in its electronic ground state X (1)Sigma(+). The vibrational g factor g(v) exhibits a pronounced minimum near internuclear distance R = 3.65 x 10(-10) m; the derivative of electric dipolar moment and the nonadiabatic matrix element coupling the electronic ground state to the first electronically excited state exhibit extrema near the same location that is also near the avoided crossing of the curves for potential energy for the electronic ground state and excited state A (1)Sigma(+). The irreducible contribution g(r)(irr)(R) to the rotational g factor increases monotonically over the calculated domain, whereas the irreducible contribution g(v)(irr)(R) to the vibrational g factor has a minimum at the same location as that of g(v) itself. From these calculated radial functions, we derived values of the rotational g factor and electric dipolar moment for LiH in vibrational states v = 0 and 1, and the corresponding rotational dependences, in satisfactory agreement with experimental values. These calculated data of rotational g factor served as constraints in new fits of 1000 vibration-rotational spectral data of LiH in four isotopic variants, which yield estimates of adiabatic corrections for comparison with published data and of the vibrational g factor for comparison with our calculated results. (C) 2010 Wiley Periodicals, Inc. Int J Quantum Chem 111: 736-752, 2011 Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2015
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