Laser and Fourier transform spectroscopy of ${}^7$Li${}^{88}$Sr

Abstract

LiSr was produced in a heat-pipe oven and its thermal emission spectrum around 9300 cm${}^{-1}$ was recorded by a high resolution Fourier transform spectrometer. In addition, selected lines of the spectrum of deeply bound vibrational levels of the $1^2{\Sigma }^{+}$ and $2^2{\Sigma }^{+}$ states were studied using laser excitation to facilitate the assignment of the lines. The ground state could be described for $v^{\prime \prime }=$ 0 - 2, $N^{\prime \prime }$ up to 105 and the $2^2{\Sigma }^{+}$ state for $v^{\prime }=0$ up to $N^{\prime }=68$. For both states, Dunham coefficients, spin-rotation parameters and potential energy curves were evaluated. A coupling of the $2^2{\Sigma }^{+}$ state to the $1^2\Pi$ state was observed, allowing a local description with Dunham coefficients of the $1^2\Pi$ state and an approximate evaluation of the coupling strength.

8 pages, 7 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

Cited by in corpus (1)

• Double Degenerate Bose-Fermi Mixture of Strontium and Lithium