Dipole polarizability of Sn-120 and nuclear energy density functionals

作者：Hashimoto, T.^*; Krumbholz, A. M.; Reinhard, P. -G.; Tamii, A.; von Neumann-Cosel, P.; Adachi, T.; Aoi, N.; Bertulani, C. A.; Fujita, H.; Fujita, Y.; Ganioglu, E.; Hatanaka, K.; Ideguchi, E.; Iwamoto, C.; Kawabata, T.; Khai, N. T.; Krugmann, A.; Martin, D.; Matsubara, H.; Miki, K.; Neveling, R.; Okamura, H.; Ong, H. J.; Poltoratska, I.; Ponomarev, V. Yu.; Richter, A.; Sakaguchi, H.; Shimbara, Y.; Shimizu, Y.; Simonis, J.; Smit, F. D.; Susoy, G.; Suzuki, T.; Thies, J. H.; Yosoi, M.

来源：PHYSICAL REVIEW C, 2015, 92(3): 031305.

DOI：10.1103/PhysRevC.92.031305

• POLARIZATION TRANSFER
• PROTON-SCATTERING
• EFFECTIVE FORCES
• SYMMETRY ENERGY
• CROSS-SECTIONS
• NEUTRON RADII
• PARAMETRIZATION
• EXCITATIONS
• EQUATION
• PB-208

The electric dipole strength distribution in Sn-120 between 5 and 22 MeV has been determined at the Research Center for Nuclear Physics, Osaka, from polarization transfer observables measured in proton inelastic scattering at E-0 = 295 MeV and forward angles including 0 degrees. Combined with photoabsorption data, a highly precise electric dipole polarizability alpha(D)(Sn-120) = 8.93(36) fm(3) is extracted. The dipole polarizability as isovector observable par excellence carries direct information on nuclear symmetry energy and its density dependence. The correlation of the new value with the well-established alpha(D)(Pb-208) serves as a test of its prediction by nuclear energy density functionals. Models based on modern Skyrme interactions describe the data fairly well while most calculations based on relativistic Hamiltonians cannot.

• 出版日期2015-9-28
• 单位RIKEN