Knowledge Bank

The visible bands of gold chloride, AuCl, have been recorded at high resolution $(0.05cm-1)$ in the $17000-20000cm-1$ region. The spectrum was recorded in emission using the Fourier transform spectrometer associated with the McMath-Pierce Solar Telescope at Kitt Peak. Excited gold chloride molecules were produced in a microwave discharge with $AuCl3$ powder in the discharge tube using 4 torr of helium seeded with 3 ppm chlorine. Four vibronic bands of the $A-X\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}\Sigma +$ transition were observed. Four vibronic bands $[(0,0),(1,0),(2,0)$ and $(0,1)]$ of the $B0+-X\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}\Sigma +$ were observed. Spectroscopic parameters for the X, A, and B states will be presented.