Laser and Fourier transform spectroscopy of KCa

Abstract

KCa was produced in a heatpipe oven and its thermal emission spectrum around 8900 cm${}^{-1}$ was recorded by a high resolution Fourier transform spectrometer. In addition, many selected transitions of this spectrum between deeply bound vibrational levels of the $\mathrm{X}(1{)}^2{\Sigma }^{+}$ and $(2{)}^2{\Sigma }^{+}$ states were studied using laser excitation to facilitate the assignment of the lines. The ground state is described for $v^{\prime \prime }=$ 0 - 5 and the $(2{)}^2{\Sigma }^{+}$ state for $v^{\prime }=0$ - 8 with rotational levels up to 175. For both states, Dunham coefficients, spin-rotation parameters and potential energy curves are derived.

9 pages, 8 figures

References in corpus (2)

• Controlling electronic spin relaxation of cold molecules with electric fields
• Dipole Polarizability of Alkali-Metal (Na, K, Rb) - Alkaline-Earth-Metal (Ca,Sr) Polar molecules - Prospects of Alignment