PRESSURE BROADENING IN THE $\nu_{1}$ and $\nu_{3}$ BAND OF $SO_{2}$ COLLISIONS WITH $SO_{2}, N_{2}$, AIR, He, Ne, Kr, Ar, Xe

Y.H. and J.W. Wish to thank the Deutsche Bundesstifung Umwelt for a grantAuthor Institution: Optisches Institut der Technischen, Universit\""{a}t BerlinWe present recent experimental results on self-, air and noble gas broadening in the $\nu_{1}$ and $\nu_{3}$ band of $SO_{2}$, obtained with a Tunable Diode Laser Spectrometer with pulse driven laser. Our investigations cover the spectral region between $1073 cm^{-1}$ for the $\nu_{1}$ band and the region between $1321 cm^{-1}$ for the $\nu_{3}$ band. For both bands we had investigated mostly lines of the P branch. We determine the broadening coefficient for collisions with $SO_{2}, N_{2}$, air He, Ne, Kr, Ar, and in some cases Xe for 31 lines with $3 \leq J^{\prime\prime} \leq 44$ and 0 $0 \leq K_{a}{^{\prime\prime}} \leq 19$ in the $\nu_{1}$ band and 23 lines from three selected wave number regions with $4 \leq J^{\prime} \leq 62$ and $0 \leq K_{a}{^{\prime\prime}} \leq 23$ in the $\nu_{3}$ band. Using several types of fit algorithms (non linear least squares fit, blind search, strategy) we achieve and experimental uncertainty of 5%. First evaluations in the $\nu_{1}$ band shows for the noble gas broadening the tendency $\gamma_{so_{2}-Kr} >\gamma_{so_{2}-Ar} > \gamma_{so_{2}-Ha} > \gamma_{so_{2}-Na}$. The analysis of the data in the $\nu_{3}$ band is in progress