Electric dipole polarizability of 40Ca

Fearick, R. W.; von Neumann-Cosel, P.; Bacca, S.; Birkhan, J.; Bonaiti, F.; Brandherm, I.; Hagen, G.; Matsubara, H.; Nazarewicz, W.; Pietralla, N.; Ponomarev, V. Yu.; Reinhard, P. -G.; Roca-Maza, X.; Richter, A.; Schwenk, A.; Simonis, J.; Tamii, A.

doi:10.1103/PhysRevResearch.5.L022044

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Electric dipole polarizability of ⁴⁰Ca

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Schwenk, A.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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https://journals.aps.org/prresearch/pdf/10.1103/PhysRevResearch.5.L022044
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Citation

Fearick, R. W., von Neumann-Cosel, P., Bacca, S., Birkhan, J., Bonaiti, F., Brandherm, I., et al. (2023). Electric dipole polarizability of ⁴⁰Ca. Physical Review Research, 5(2): L022044. doi:10.1103/PhysRevResearch.5.L022044.

Cite as: https://hdl.handle.net/21.11116/0000-000D-80D4-2

Abstract

The electric dipole strength distribution in ⁴⁰Ca between 5 and 25 MeV has been determined at RCNP, Osaka, from proton inelastic scattering experiments at very forward angles. Combined with total photoabsorption data at higher excitation energy, this enables an extraction of the electric dipole polarizability α_D(⁴⁰Ca)=1.92(17) fm3. Together with the measured α_D in ⁴⁸Ca, it provides a stringent test of modern theoretical approaches, including coupled-cluster calculations with chiral effective field theory interactions and state-of-the art energy density functionals. The emerging picture is that for this medium-mass region dipole polarizabilities are well described theoretically, with important constraints for the neutron skin in ⁴⁸Ca and related equation of state quantities