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Dipole polarizability of Sn 120 and nuclear energy density functionals

2015; American Institute of Physics; Volume: 92; Issue: 3 Linguagem: Inglês

10.1103/physrevc.92.031305

1538-4497

T. Hashimoto, A. M. Krumbholz, P.‐G. Reinhard, A. Tamii, P. von Neumann–Cosel, T. Adachi, N. Aoi, C. A. Bertulani, H. Fujita, Y. Fujita, E. Ganioğlu, K. Hatanaka, E. Ideguchi, Chihiro Iwamoto, T. Kawabata, Nguyễn Tuấn Khải, A. Krugmann, D. Martin, Hiroaki Matsubara, K. Miki, R. Neveling, H. Okamura, H. J. Ong, I. Poltoratska, V. Yu. Ponomarev, A. Richter, H. Sakaguchi, Y. Shimbara, Y. Shimizu, J. Simonis, F. D. Smit, G. Süsoy, T. Suzuki, J. H. Thies, M. Yosoi, J. Zenihiro,

Nuclear Physics and Applications

The electric dipole strength distribution in 120Sn between 5 and 22 MeV has been determined at RCNP Osaka from a polarization transfer analysis of proton inelastic scattering at E_0 = 295 MeV and forward angles including 0{\deg}. Combined with photoabsorption data an electric dipole polarizability \alpha_D(120Sn) = 8.93(36) fm^3 is extracted. The dipole polarizability as isovector observable par excellence carries direct information on the nuclear symmetry energy and its density dependence. The correlation of the new value with the well established \alpha_D(208Pb) serves as a test of its prediction by nuclear energy density functionals (EDFs). Models based on modern Skyrme interactions describe the data fairly well while most calculations based on relativistic Hamiltonians cannot.