Q-phonon description of low lying 1^- two-phonon states in spherical   nuclei
  The properties of 1^-_1 two-phonon states and the characteristics of E1 transition probabilities between low-lying collective states in spherical nuclei are analysed within the Q-phonon approach to the description of collective states. Several relations between observables are obtained. Microscopic calculations of the E1 0^+_1 -> 1^-_1 transition matrix elements are performed on the basis of the RPA. A satisfactory description of the experimental data is obtained. 
R.V.Jolos, N.Yu.Shirikova and V.V.Voronov