New data for the elastic scattering of 9Be from protons were obtained and analyzed together with data from the literature in a coherent coupled-reaction-channels approach. The new measurements were performed in inverse kinematics at 15, 22 and 51 MeV (1.67, 2.44, and 5.67 MeV/nucleon) by detecting the heavy ejectile in the MAGNEX spectrometer. This enabled an almost full angular distribution to be obtained, extending the results to forward angles where calculated values coincide and give the opportunity of proper normalization. Previous inconsistencies in absolute normalization between different data sets are removed. Standard collective model form factors fail to reproduce the inelastic scattering to the 2.43 MeV 5/2− state of 9Be, suggesting that a more sophisticated approach based on the cluster structure of 9Be is required to describe this process.
Coherent coupled-reaction-channels analysis of existing and new p+Be9 data between 1.7 and 15 MeV/nucleon
La Commara, M.;Mazzocco, M.;Parascandolo, C.;Strano, E.;Torresi, D.;
2019
Abstract
New data for the elastic scattering of 9Be from protons were obtained and analyzed together with data from the literature in a coherent coupled-reaction-channels approach. The new measurements were performed in inverse kinematics at 15, 22 and 51 MeV (1.67, 2.44, and 5.67 MeV/nucleon) by detecting the heavy ejectile in the MAGNEX spectrometer. This enabled an almost full angular distribution to be obtained, extending the results to forward angles where calculated values coincide and give the opportunity of proper normalization. Previous inconsistencies in absolute normalization between different data sets are removed. Standard collective model form factors fail to reproduce the inelastic scattering to the 2.43 MeV 5/2− state of 9Be, suggesting that a more sophisticated approach based on the cluster structure of 9Be is required to describe this process.Pubblicazioni consigliate
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