Knowledge Bank

A Fourier transform spectrometer and tunable diode laser have been used to measure the wavenumbers and relative intensities of the entire 1-0 vibrational band of C10, including both $\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\pi \mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}/2-\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\pi \mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}/2$ and $\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\pi \mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}/2-\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\pi \mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}/2$ transistions for both chlorine isotopes. Measurements of the $\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\pi \mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}/2-\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\pi \mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}/2$ transitions of the 2-0 band of $\mathrm{<mrow\; data-mjx-texclass="ORD">35</mrow>}C10$ have also been made. Improved rovibrational constants will be given along with improved values for the energy levels and infrared transition frequncies. The Herman-Wallis term describing the rotational dependence of the intensity has been determined from relative line intensity measurements made across the band. From this term it has been possible to determine the 1-0 transition moment and intergrated band intensity without measuring C10 concentration.