Fourier transform emission spectrum of the HCSi radical, Ã 2Σ+–X̃ 2Πi transition

Autor:	R. Cireasa, J. M. Robbe, D. Cossart, M. Vervloet
Rok vydání:	2000
Předmět:	Chemistry Ab initio General Physics and Astronomy Infrared spectroscopy law.invention symbols.namesake Fourier transform law Excited state symbols Emission spectrum Physical and Theoretical Chemistry Atomic physics Gas-filled tube Ground state Fermi Gamma-ray Space Telescope
Zdroj:	The Journal of Chemical Physics. 112:10806-10810
ISSN:	1089-7690 0021-9606
Popis:	A Fourier transform emission spectrum of the HCSi, A 2Σ+–X 2Πi transition was observed by means of a Schuler-type discharge tube in the 9000–14 000 cm−1 spectral region. Three bands whose origins appeared at 12 934.406, 11 766.721, and 10 752.430 cm−1 were rotationally analyzed and assigned, respectively, to the (100)–(000), (000)–(000), and (000)–(100) bands. The new ab initio calculated A(X 2Π) spin–orbit constant agrees well with the experimental value. Weak rotational perturbations in the (100) level of the upper electronic state are likely due to highly excited vibrational levels of the ground state, whereas the “anomalous” increase of the spin–rotation constant in the (100) level of the ground state relative to the (000) level was shown to result of a Fermi interaction with the (020) 2Π Renner–Teller components. A comparison was made between the rotational constants of the (000) ground state level with those obtained in concomitant works.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5e43bcf73c85db36f8c3be075d88ee75 https://doi.org/10.1063/1.481724 Zobrazit plný text záznamu