Stark effect in odd-parity J=1 levels of neutral barium

Stark splitting of the barium 6snp 1P1 states with principal quantum numbers ranging from 8 to 15 and of the 5d7p 1P1 perturber level was measured in an atomic beam via pulsed laser excitation with time-and wave length-resolved fluorescence detection at low electric field strengths. Tensor polarizabilities were derived from the quantum beat signals observed in pure homogeneous electric fields. Strong variations of the tensor polarizabilities of the levels in the 6snp 1P1 series were found. (orig.). With 1 fig., 1 tab