The electromagnetic dipole response of 138 Ba was measured up to 6.7 MeV excitation energy in a photon scattering experiment. Two Euroball Cluster detectors were used to detect the scattered photons under 94 and 132 degrees. The Cluster at 94 degrees served as a Compton polarimeter. The total observed dipole cross section is in good agreement with previous tagged photon data, but in the present experiment the transition strength and the electric character of most of the transitions has been determined on a state-by-state basis. The data show a concentration of E1 strength around 6 MeV. For one of the strongest excitations M 1 character is suggested. The results of model calculations using the quasiparticle phonon model ͑QPM͒ agree with the observed electric dipole strength distribution. ͓S0556-2813͑99͒51311-3͔
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