Electric dipole polarizability of Ca 40

Fearick RW, Von Neumann-Cosel P, Bacca S, Birkhan J, Bonaiti F, Brandherm I, Hagen G, Matsubara H, Nazarewicz W, Pietralla N, Ponomarev VY, Reinhard PG, Roca-Maza X, Richter A, Schwenk A, Simonis J, Tamii A (2023)

Publication Type: Journal article

Publication year: 2023


Book Volume: 5

Article Number: L022044

Journal Issue: 2

DOI: 10.1103/PhysRevResearch.5.L022044


The electric dipole strength distribution in Ca40 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 αD(40Ca)=1.92(17) fm3. Together with the measured αD in Ca48, 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 Ca48 and related equation of state quantities.

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


Fearick, R. W., et al. "Electric dipole polarizability of Ca 40." Physical Review Research 5.2 (2023).

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