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Pion scattering to collective excitations in /sup 90/Zr and /sup 118/Sn

Journal Article · · Phys. Rev. C; (United States)
Inelastic scattering of 163 MeV ..pi../sup -/ and ..pi../sup +/ to the collective states of /sup 90/Zr and /sup 118/Sn was used to determine the neutron-proton composition of the transitions. The lowest 2/sup +/ and 3/sup -/ states were examined for both targets, as were the low-energy octupole, giant quadrupole, and giant monopole excitations. Only slight deviations from the features expected for a hydrodynamic model are observed for the low-lying 3/sup -/ and 2/sup +/ states of /sup 118/Sn, but these states are observed to be proton-like in /sup 90/Zr. The giant quadrupole resonances and giant monopole resonances in both targets show a significantly greater ..pi../sup -/ than ..pi../sup +/ strength, while the low-energy octupole resonance is excited symmetrically.
Research Organization:
Nuclear Physics Laboratory, Department of Physics, University of Colorado, Boulder, Colorado 80309
OSTI ID:
5854232
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 35:3; ISSN PRVCA
Country of Publication:
United States
Language:
English