Complete electric dipole response and the neutron skin in Pb208

A. Tamii, I. Poltoratska, P. Von Neumann-Cosel, Y. Fujita, Tatuya Adachi, C. A. Bertulani, J. Carter, M. Dozono, H. Fujita, K. Fujita, K. Hatanaka, D. Ishikawa, M. Itoh, T. Kawabata, Y. Kalmykov, A. M. Krumbholz, E. Litvinova, H. Matsubara, K. Nakanishi, R. NevelingH. Okamura, H. J. Ong, B. Özel-Tashenov, V. Yu Ponomarev, A. Richter, B. Rubio, H. Sakaguchi, Yasuhiro Sakemi, Y. Sasamoto, Y. Shimbara, Y. Shimizu, F. D. Smit, T. Suzuki, Y. Tameshige, J. Wambach, R. Yamada, M. Yosoi, J. Zenihiro

Research output: Contribution to journalArticlepeer-review

390 Citations (Scopus)


A benchmark experiment on Pb208 shows that polarized proton inelastic scattering at very forward angles including 0° is a powerful tool for high-resolution studies of electric dipole (E1) and spin magnetic dipole (M1) modes in nuclei over a broad excitation energy range to test up-to-date nuclear models. The extracted E1 polarizability leads to a neutron skin thickness r skin=0.156-0.021+0.025fm in Pb208 derived within a mean-field model, thereby constraining the symmetry energy and its density dependence relevant to the description of neutron stars.

Original languageEnglish
Article number062502
JournalPhysical review letters
Issue number6
Publication statusPublished - 2011 Aug 3

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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