Elastic proton scattering from 4He at 297 MeV

M. Yoshimura, M. Nakamura, H. Akimune, I. Daito, T. Inomata, M. Itoh, M. Kawabata, T. Noro, H. Sakaguchi, H. Takeda, A. Tamii, K. Yonehara, H. P. Yoshida, M. Yosoi

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14 Citations (Scopus)


Differential cross sections, analyzing powers, and spin rotation parameters for elastic scattering of protons on 4He at 297 MeV have been measured over a wide angular range (12°≤θlab≤66°). Experimental data have been microscopically analyzed with relativistic impulse approximation calculations. The spin observables up to medium scattering angles (θc.m.≤40°) are predominantly sensitive to the ratio of the volume integral of scalar density to vector density. With a ratio of 0.92, which is significantly smaller than those for heavier nuclei (0.96-0.98), both spin observables as well as the differential cross section have been quantitatively reproduced. According to nuclear matter calculations, the small ratio reflects a high mass density. At backward angles, the experimental cross sections are larger than any of the values calculated with realistic density distributions.

Original languageEnglish
Article number034618
Pages (from-to)346181-3461811
Number of pages3115631
JournalPhysical Review C - Nuclear Physics
Issue number3
Publication statusPublished - Mar 2001

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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