Electric dipole polarizability of ${}^{40}$Ca

Abstract

The electric dipole strength distribution in ${}^{40}$Ca 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 ${\alpha }_{\mathrm{D}}$(${}^{40}$Ca) = 1.92(17) fm${}^3$. Together with the measured ${\alpha }_{\mathrm{D}}$ in ${}^{48}$Ca, 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 ${}^{48}$Ca and related equation of state quantities.

6 pages, 3 figures

References in corpus (15)

• Improved nuclear matter calculations from chiral low-momentum interactions
• Nuclear symmetry energy probed by neutron skin thickness of nuclei
• Relativistic Nuclear Energy Density Functionals: adjusting parameters to binding energies
• Accurate nuclear radii and binding energies from a chiral interaction
• Neutron skin of 208Pb, nuclear symmetry energy, and the parity radius experiment
• Precision Determination of the Neutral Weak Form Factor of ${}^{48}$Ca
• Ab initio predictions link the neutron skin of ${}^{208}$Pb to nuclear forces
• Constraints on Nuclear Symmetry Energy Parameters
• Combined theoretical analysis of the parity-violating asymmetry for ${}^{48}$Ca and ${}^{208}Pb$
• Nuclear equation of state for arbitrary proton fraction and temperature based on chiral effective field theory and a Gaussian process emulator
• Implications of PREX-2 on the electric dipole polarizability of neutron rich nuclei
• Electric and magnetic dipole strength in 112,114,116,118,120,124Sn
• Implications of parity-violating electron scattering experiments on ${}^{48}$Ca (CREX) and ${}^{208}$Pb (PREX-II) for nuclear energy density functionals
• Evolution of the dipole polarizability in the stable tin isotope chain
• Exploration of a modified density dependence in the Skyrme functional

Cited by in corpus (10)

• Electromagnetic observables of open-shell nuclei from coupled-cluster theory
• Electric dipole polarizability of ${}^{58}$Ni
• Structure and dynamics of open-shell nuclei from spherical coupled-cluster theory
• Electric and magnetic dipole strength in ${}^{58}$Ni from forward-angle inelastic proton scattering
• Ab initio computations of the fourth-order charge density moments of ${}^{48}$Ca and ${}^{208}$Pb
• Probing new hadronic forces with heavy exotic atoms
• Electric dipole polarizability constraints on neutron skin and symmetry energy
• Low-energy dipole strength in 8He
• Direct ab initio calculation of the ${}^4$He nuclear electric dipole polarizability
• Electric dipole strength in $sd$-shell nuclei from small-angle proton scattering