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Isospin character of the giant quadrupole transition in 124Sn

D. J. Horen F.E. Bertrand J.R. Beene G.R. Satchler W. Mittig 1 A.C.C. Villari 1 Y. Schutz 1 Zhan Wenlong 1 E. Plagnol 1 A. Gillibert 2
1 GANIL - Grand Accélérateur National d'Ions Lourds
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
Abstract : Use has been made of the interference between the nuclear and Coulomb amplitudes in the scattering of 84 MeV/nucleon 17O ions by 124Sn to study the isospin character of the giant quadrupole transition. The data are well described by assuming the transition is ''isoscalar,'' i.e., Mn/Mp=N/Z. This is in disagreement with the results of π+/π- scattering on 118Sn and recent (e,e'n) measurements on 116Sn. Cross sections for excitation of the 2+ state at 1.132 MeV, 3- state at 2.614 MeV, and giant monopole resonance are included with corresponding coupled-channels calculations.
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Submitted on : Wednesday, May 9, 2012 - 10:48:17 AM
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D. J. Horen, F.E. Bertrand, J.R. Beene, G.R. Satchler, W. Mittig, et al.. Isospin character of the giant quadrupole transition in 124Sn. Physical Review C, American Physical Society, 1991, 44, pp.2385-2389. ⟨10.1103/PhysRevC.44.2385⟩. ⟨in2p3-00695566⟩

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