Shallow and diffuse spin-orbit potential for proton elastic scattering from neutron-rich helium isotopes at 71 MeV/nucleon

S. Sakaguchi, T. Uesaka, N. Aoi, Y. Ichikawa, K. Itoh, M. Itoh, T. Kawabata, T. Kawahara, Y. Kondo, H. Kuboki, T. Nakamura, T. Nakao, Y. Nakayama, H. Sakai, Y. Sasamoto, K. Sekiguchi, T. Shimamura, Y. Shimizu, T. Wakui

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Abstract

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.

Original languageEnglish
Article number021601
JournalPhysical Review C - Nuclear Physics
Volume87
Issue number2
DOIs
Publication statusPublished - Feb 20 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Sakaguchi, S., Uesaka, T., Aoi, N., Ichikawa, Y., Itoh, K., Itoh, M., Kawabata, T., Kawahara, T., Kondo, Y., Kuboki, H., Nakamura, T., Nakao, T., Nakayama, Y., Sakai, H., Sasamoto, Y., Sekiguchi, K., Shimamura, T., Shimizu, Y., & Wakui, T. (2013). Shallow and diffuse spin-orbit potential for proton elastic scattering from neutron-rich helium isotopes at 71 MeV/nucleon. Physical Review C - Nuclear Physics, 87(2), [021601]. https://doi.org/10.1103/PhysRevC.87.021601