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\title{MEASUREMENTS AND MODELING OF SELF-BROADENING COEF\-FI\-CIENTS 
  FOR THE $\nu_2$/$\nu_4$ BANDS OF SiH$_4$}

\author{\underline{\FirstName E. \LastName RADDAOUI},
  \FirstName F. \LastName KWABIA TCHANA, \FirstName X. \LastName LANDSHEERE}
\address{Universit\'e Paris Cit\'e and Univ Paris Est Creteil, CNRS, LISA, 
  F-75013 Paris, France}

\author{\FirstName V. \LastName BOUDON}
\address{Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS, 
  Universit\'e Bourgogne Franche-Comt\'e, 9 avenue Alain Savary, BP 47870, 
  F-21078 Dijon Cedex, France}

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\fancyhead[C]{{\footnotesize \textit{HRMS, 28th Colloquium, Dijon, France,
  Aug. 28 - Sept. 1, 2023}}}
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\category {8,3}
\category {8,3}
\begin{document}

\maketitle  

Silane (SiH$_4$) is naturally present in the interstellar medium. It is also largely used 
in semi-conductor industry to perform silicon deposits and silicon nanostructures.
Molecular cloud studies as well as industrial applications require an extensive and 
accurate modeling of its infrared absorption spectrum.
However, although this molecule has received some attention many years 
ago\footnote{\href{https://doi.org/10.1016/0022-2852(75)90265-9}{doi:10.1016/0022-2852(75)90265-9}, 
D.V. Willetts, W.J. Jones, A.G. Robiette. \textit{J Mol Spectrosc} \textbf{55}, 200-216, 
(1975)}$^,$\footnote{i\href{https://doi.org/10.1016/0022-2852(77)90333-2}{doi:10.1016/0022-2852(77)90333-2},
A. Cabana, D.L. Gray, I.Mills, A.G. Robiette. \textit{J Mol Spectrosc} \textbf{66}, 174-176,i
(1977)}$^,$\footnote{\href{https://doi.org/10.1080/00268977800102531}{doi:10.1080/00268977800102531}, 
A. Cabana, D.L. Gray, A.G. Robiette, G. Pierre. \textit{J Mol Phys} \textbf{36}, 1503-1516,
(1978)}$^,$\footnote{\href{https://doi.org/10.1139/p84-040}{doi:10.1139/p84-040}, 
G. Pierre, A. Valentin, L. Henry. \textit{Can J Phys} \textbf{62}, 207-305,
(1984)}$^,$\footnote{\href{https://doi.org/10.1139/p90-084}{doi:10.1139/p90-084}, H. Prinz, W.A. Kreiner, 
G. Pierre. \textit{Can J Phys} \textbf{68}, 7-8,
(1990)}$^,$\footnote{\href{https://doi.org/10.1016/0022-2852(90)90259-S}{doi:10.1016/0022-2852(90)90259-S},
B. Lavorel, D. Millot, Q. Kou, G. Guelachvili, K. Bouzouba, P. Lepage, V. Tyuterev, G. Pierre. 
\textit{J Mol Spectrosc} \textbf{143}, 35-49,
(1990)}$^,$\footnote{\href{https://doi.org/10.1016/0022-2852(92)90480-C}{doi:10.1016/0022-2852(92)90480-C}, 
W. Hohe, A. Ainechian, W.A Kreiner, M. Loete. \textit{J Mol Spectrosc}\textbf{135}, 1-2 (1992)},
its high-resolution spectrum is still insufficiently characterized and need some modern reinvestigation.
Silane in a natural isotopic composition produces complex infrared spectra, not least as three stable 
isotopologues exist in proper abundances with mass numbers of 28 ($92.23\%$), 29 ($4.68\%$), 
and 30 ($3.09\%$).
The present work is dedicated to measurements self-broadening coefficients for transitions 
of the $\nu_2$/$\nu_4$ bands, based on a set of spectra recorded with the Bruker IF125HR 
Fourier transform spectrometer located at the LISA facility in Cr\'eteil, using an absorption 
path length of 5 cm and pressures up to 16 hPa.
The results were obtained by analyzing nine high-resolution room temperature absorption 
spectra with a multi-spectrum non-linear least squares fitting of Voigt profiles. 
589 transitions have been studied to model the J-rotational quantum number dependence of 
the self-broadening coefficients. 
The accuracy of the retained self-broadening coefficients was estimated to be better than $10\%$.

\end{document}
