Shallow and Diffuse Spin-Orbit Potential for Proton Elastic Scattering from Neutron-Rich Helium Isotopes at 71 MeV/nucleon
Physical review C Nuclear physics/Physical review C, Nuclear physics(2013)
摘要
Vector analyzing powers for proton elastic scattering from 8He at 71 MeV/nucleon have been measured using a solid polarized proton target operated in a low magnetic field of 0.1 T. The spin-orbit potential obtained from a phenomenological optical model analysis is found to be significantly shallower and more diffuse than the global systematics of stable nuclei, which is an indication that the spin-orbit potential is modified for scattering involving neutron-rich nuclei. A close similarity between the matter radius and the root-mean-square radius of the spin-orbit potential is also identified.
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