Probing the quadrupole transition strength of C15 via deuteron inelastic scattering

J. Chen, B. P. Kay, T. L. Tang, I. A. Tolstukhin, C. R. Hoffman, H. Li, P. Yin, X. Zhao, P. Maris, J. P. Vary, G. Li, J. L. Lou, M. L. Avila, Y. Ayyad, S. Bennett, D. Bazin, J. A. Clark, S. J. Freeman, H. Jayatissa, C. Müller-GatermannA. Munoz-Ramos, D. Santiago-Gonzalez, D. K. Sharp, A. H. Wuosmaa, C. X. Yuan

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Deuteron elastic scattering from 15C and inelastic scattering reactions to the first excited state of 15C were studied using a radioactive beam of 15 C in inverse kinematics. The scattered deuterons were measured using HELIOS. The elastic scattering differential cross sections were analyzed using the optical model. A matter deformation length δd=1.04(11)fm has been extracted from the differential cross sections of inelastic scattering to the first excited state. The ratio of neutron and proton matrix elements Mn/Mp=3.6(4) has been determined from this quadrupole transition. Neutron effective charges and core-polarization parameters of 15C were determined and discussed. Results from ab initio no-core configuration interaction calculations were also compared with the experimental observations. This result supports a moderate core decoupling effect of the valence neutron in 15 C similarly to its isotone 17 O , in line with the interpretation of other neutron-rich carbon isotopes.
Original languageEnglish
JournalPhysical Review C
Issue number6
Publication statusPublished - 12 Dec 2022


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