LINE INTENSITY MEASUREMENTS AND ANALYSIS IN THE ν3 BAND OF RUTHENIUM TETROXIDE

Ruthenium tetroxide (RuO$_4$) is a heavy tetrahedral molecule characterized by an unusual volatility near ambient temperature. Because of its chemical toxicity and the radiological impact of its $^{103}$Ru and $^{106}$Ru isotopologues, the possible remote sensing of this compound in the atmosphere has renewed interest in its spectroscopic properties. In a recent study, the strong fundamental band associated with the excitation of the infrared active stretching mode $\nu_3$ of $^{102}$Ru$^{16}$O$_4$, observed near 10 $\mu$m, was re-investigated at high-resolution (0.001 cm$^{-1}$) with the help of a $^{102}$Ru isotopically pure sample.\footnote{S. Reymond-Laruinaz, V. Boudon, L. Manceron, L. Lago, D. Doizi, J Mol Spectrosc 315 (2015) 46--54.} Building upon that work, the present contribution is the first investigation dealing with high-resolution line-by-line intensity measurements for the $\nu_3$ fundamental band of $^{102}$Ru$^{16}$O$_4$. It relies on high resolution Fourier transform infrared spectra specifically recorded at room temperature at the AILES beam line of SOLEIL using synchrotron radiation, a specially constructed cell and an isotopically pure sample of $^{102}$Ru$^{16}$O$_4$. Relying on an effective Hamiltonian and associated effective dipole moment,$^{a}$ the measured line intensities were assigned and dipole moment parameters determined. A HITRAN-formatted frequency and intensity line list was generated