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Electric dipole polarizability of Ni 58

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The electric dipole strength distribution in 58Ni between 6 and 20 MeV has been determined from proton inelastic scattering experiments at very forward angles at RCNP, Osaka. The experimental data are rather well reproduced by quasiparticle random-phase approximation calculations including vibration coupling, despite a mild dependence on the adopted Skyrme interaction. They allow an estimate of the experimentally inaccessible high-energy contribution above 20 MeV, leading to an electric dipole polarizability D⁡(58Ni)=3.48⁢(31)⁢fm3. This serves as a test case for recent extensions of coupled-cluster calculations with chiral effective field theory interactions to nuclei with two nucleons on top of a closed-shell system.

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BRANDHERM, Isabelle, BONAITI, Francesca, VON NEUMANN-COSEL, Peter, BACCA, S., COLÒ, Gianluca, JANSEN, G.r., LI, Zheng zheng, MATSUBARA, H., NIU, Yifei, REINHARD, P.-g., RICHTER, Andreas, ROCA MAZA, Xavier, TAMII, Atsushi. Electric dipole polarizability of Ni 58. _Physical Review C_. 2025. Vol. 111, núm. 2. [consulta: 27 de gener de 2026]. ISSN: 2469-9985. [Disponible a: https://hdl.handle.net/2445/221877]

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