ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA
; ACAD SINICA,INST HIGH ENERGY PHYS,BEIJING 100039,PEOPLES R CHINA
; TSING HUA UNIV,DEPT PHYS,BEIJING 100084,PEOPLES R CHINA
The description of the medium energy pion-nucleus inelastic scattering which excites the target from the ground state to a negative parity state is discussed in the approach of combining Eikonal approximation with spdf Interacting Boson Model. The calculated differential cross sections of the 180 MeV pi(+/-) - Sm-152 scattering with excitation from 0(1)(+) to 3(1)(-) state and the deformation parameters of the 3(1)(-) state agree with experimental data quite well. It indicates that the 3(1)(-) state of Sm-152 may probably be an outupole vibrational state. And the effect of multiple scattering is shown to be important in the scattering process.