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arXiv · 1712.05320

Laser and Fourier transform spectroscopy of KCa

Julia Gerschmann·Erik Schwanke·Asen Pashov·Horst Knöckel·Silke Ospelkaus·Eberhard Tiemann
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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 $\mathrm{X}(1)^2Σ^+$ and $(2)^2Σ^+$ 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 $(2)^2Σ^+$ 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.

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Julia Gerschmann, Erik Schwanke, Asen Pashov, Horst Knöckel, Silke Ospelkaus, Eberhard Tiemann. 2017-12-14. Laser and Fourier transform spectroscopy of KCa. https://doi.org/10.1103/physreva.96.032505

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