SIMBAD references

Zeeman splittings of the rotational transitions of the CCS and SO radicals in the ³Σ^– ground electronic state have been calculated. Since the coupling scheme of the rotational angular momentum and the electron-spin angular momentum is intermediate between Hund's cases (a) and (b), the mixing between the F₁ and F₃ levels has been treated strictly. In order to confirm the calculation, Zeeman splittings of the J_N=4₃-3₂ and J_N=3₂-2₁ lines of CCS are measured by laboratory microwave spectroscopy. The effective g-factors evaluated in the present study are of particular importance in the determination of the magnetic field strength of dense cores through polarization observations.