High resolution study of MSiH4 (M=28, 29, 30) in the Dyad Region: Analysis of line positions, intensities and half-widths; Journal of Quantitative Spectroscopy and Radiative Transfer; Vol. 203

Dades bibliogràfiques
Parent link:	Journal of Quantitative Spectroscopy and Radiative Transfer Vol. 203.— 2017.— [P. 496-510]
Autor corporatiu:	Национальный исследовательский Томский политехнический университет (ТПУ) Физико-технический институт (ФТИ) Кафедра общей физики (ОФ)
Altres autors:	Ulenekov (Ulenikov) O. N. Oleg Nikolaevich, Gromova O. V. Olga Vasilievna, Bekhtereva E. S. Elena Sergeevna, Raspopova N. I. Natalya Ivanovna, Fomchenko A. L. Anna Leonidovna, Sydow C. Christian, Bauerecker S. Sigurd, Kashirina N. V. Nadezhda Vladimirovna
Sumari:	Title screen The infrared spectra of SiH4 in natural abundance (92.23% of 28SiH4, 4.68% of 29SiH4, and 3.09% of 30SiH4) were measured in the region of 600–1200 cm-1 with a Bruker IFS 120HR Fourier transform spectrometer, analyzed and compared with the results available in the literature. More than 3500 transitions with Jmax.=27 were assigned to the dyad bands ?4 and ?2 of 28SiH4 (the band ?2 is allowed in Raman, but forbidden in absorption spectra for symmetry reasons, and its transitions appear in absorption spectra only because of strong Coriolis interaction with the ?4 band). Rotational, centrifugal distortion, tetrahedral splitting, and interaction parameters for the ground, (0100) and (0001) vibrational states were determined from the fit of experimental line positions. The obtained set of parameters reproduces the initial experimental data with accuracy close to experimental uncertainties. The results of the analogous analyses of the 29SiH4 and 30SiH4 isotopologues are also presented (the numbers of the assigned transitions are here more than 1360 and 1120). An further analysis of about 790 experimental ro-vibrational lines in the dyad region of 28SiH4 was performed using the Voigt profile to simulate the measured line shape and to determine experimental line intensities. A set of 4 effective dipole moment parameters for the dyad of 28SiH4 was obtained on that basis from the weighted fit, which reproduce the initial experimental intensities of about 790 lines with the drms=5.6%. Analogous analyses were made for the two other isotopic species, 29SiH4, and 30SiH4. A detailed line list of transitions in the region of 750–1150 cm-1 is generated. The half-widths of 40 ro-vibrational lines (Jup.max.=16) are studied from the multi-spectrum analysis, and self-pressure broadening coefficients are determined. Режим доступа: по договору с организацией-держателем ресурса
Idioma:	anglès
Publicat:	2017
Matèries:	электронный ресурс труды учёных ТПУ диады
Accés en línia:	https://doi.org/10.1016/j.jqsrt.2017.03.020
Format:	Electrònic Capítol de llibre
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656423