Dipole polarizability of 120Sn and nuclear energy density functionals

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. Ganioǧlu; K. Hatanaka; C. Iwamoto; T. Kawabata; N. T. Khai; A. Krugmann; D. Martin; H. 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; J. H. Thies; T. Suzuki; M. Yosoi; J. Zenihiro

doi:10.1103/physrevc.92.031305

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arXiv · 1503.08321

Dipole polarizability of 120Sn and nuclear energy density functionals

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Abstract

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°. Combined with photoabsorption data an electric dipole polarizability α_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 α_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.

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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. Ganioǧlu, K. Hatanaka, C. Iwamoto, T. Kawabata, N. T. Khai, A. Krugmann, D. Martin, H. 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, J. H. Thies, T. Suzuki, M. Yosoi, J. Zenihiro. 2015-09-29. Dipole polarizability of 120Sn and nuclear energy density functionals. https://doi.org/10.1103/physrevc.92.031305

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