Knowledge Bank

The first overtone band of the C10 radical in the $\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\Pi 3/2$ component of the ground electronic state has been studied by the technique of laser magnetic resonance using $\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}C16C,12C18O$ and $\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}C18O$ laser lines in the $1660-1680cm-1$ region. The C10 was produced by a microwave discharge in a mixture of $Cl2$ and $O2$ at pressures of 0.05 to 1.0 Torr, and flowed into an absorption cell located between the poles of a $12\prime$ Varian electromagnet and Within the laser cavity. It was not possible to observe saturation dips in the spectra even at a pressure of 60 mTorr, presumably because of the inherent weakness of this $\Delta v=2$ transition. The Q(1.5), Q(2.5) and P(2.5) lines of $\mathrm{<mrow\; data-mjx-texclass="ORD">35</mrow>}$C10 and the Q(1.5), R(1.5), and R(2.5) lines of\marginpar{*Check} $\mathrm{<mrow\; data-mjx-texclass="ORD">37</mrow>}$C10 were observed. From the extrapolated zero field positions of these transitions, the following molecular parameters were determined: for $\mathrm{<mrow\; data-mjx-texclass="ORD">95</mrow>}C10,\nu o=1677.259cm-1,B2=0.6080cm-1$ for $\mathrm{<mrow\; data-mjx-texclass="ORD">37</mrow>}C10,\nu o=1663.254cm-1,B2=0.5977cm-1$.