Knowledge Bank

Emission spectra of the B$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\Sigma +$--X$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\Sigma +$ transition of $\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}$C$\mathrm{<mrow\; data-mjx-texclass="ORD">14</mrow>}$N have been observed at high resolution using the Fourier transform spectrometer associated with the McMath-Pierce Solar Telescope of the National Solar Observatory. The spectra have been measured in the 21000--30000 cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$ region and a total of 52 vibrational bands involving vibrational levels up to $v=15$ of the ground and excited states have been rotationally analyzed to provide a much improved set of spectroscopic constants. The results of the present analysis should prove useful in the identification of additional $\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}$C$\mathrm{<mrow\; data-mjx-texclass="ORD">14</mrow>}$N lines in comets and cool stars, and will help in the determination of the $\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}$C/$\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}$C abundance ratio. The observation of a number of highly-excited vibrational bands of the A$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\Pi$--X$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\Sigma +$ transition as well as a few bands of the B$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\Sigma +$--A$\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}\Pi$ transition will also be reported.