Knowledge Bank

The dipole moments of the HY molecule and the recently discovered HYN molecule in some of their electronic states have been measured by Stark spectroscopy in a molecular beam apparatus. Electric fields up to 16 kv/cm have been employed resulting in the complete resolution of Stark patterns even in the molecular states of $\Sigma$ syetry of HYN. The dipole moments were extracted by fitting the calculated to the experimental Stark splittings for several electric field strengths using a least-squares procedure. The calculated splittings were generated (when necessary) from the exact diagonalization of the appropriate Hamiltonian matrix. The derived values will be presented, discussed and compared (when available) with recent ab initio results.