학술논문
Probing the quadrupole transition strength of 15C via deuteron inelastic scattering
Document Type
Working Paper
Author
Chen, J.; Kay, B. P.; Tang, T. L.; Tolstukhin, I. A.; Hoffman, C. R.; Li, H.; Yin, P.; Zhao, X.; Maris, P.; Vary, J. P.; Li, G.; Lou, J. L.; Avila, M. L.; Ayyad, Y.; Bennett, S.; Bazin, D.; Clark, J. A.; Freeman, S. J.; Jayatissa, H.; Müller-Gatermann, C.; Munoz, A.; Santiago-Gonzalez, D.; Sharp, D. K.; Wuosmaa, A. H.; Yuan, C. X.
Source
Subject
Language
Abstract
Deuteron elastic scattering from 15C and inelastic scattering reactions to the first excited state of 15C were studied using a radioactive beam of 15C 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 {\delta}d = 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 15C similarly to its isotone 17O, in line with the interpretation of other neutron-rich carbon isotopes.