VIBRATIONAL DEPENDENCE OF THE DIPOLE-MOMENT AND RADIATIVE TRANSITION-PROBABILITIES IN THE X-1-SIGMA(- A LINEAR-RESPONSE COUPLED-CLUSTER STUDY() STATE OF HF )

The recently developed orthogonally spin-adapted linear-response coupl ed-cluster theory with singly and doubly excited clusters (LRCCSD) has been applied to calculate the dipole moment function of HF. Using an accurate potential energy function derived from spectroscopic data and a dipole moment function obtained in LRCCSD calculations, the effecti ve dipole moment values in individual vibrational states and the corre sponding vibrational transition dipole moments have been determined ov er a wide range of values of vibrational quantum numbers. The calculat ed matrix elements of the dipole moment have been found to be in good agreement with the available experimental and theoretical data, indica ting the suitability of the LRCCSD approach for such calculations.