$\alpha$-nucleus optical potentials from chiral effective field theory $NN$ interactions

Abstract

We present a determination of optical potentials for ${}^4$He-target collisions using the double-folding method. We use chiral effective field theory nucleon-nucleon interactions at next-to-next-to-leading order combined with state-of-the-art nucleonic densities. The imaginary part of the optical potential is obtained from the real double-folding interaction either through a proportionality constant or applying Kramers-Kronig dispersion relations. With these potentials, we compute the elastic scattering of ${}^4$He off various targets, from ${}^4$He to ${}^{120}$Sn. We study the sensitivity of our predicted cross sections to the choice of nucleon-nucleon interactions and nuclear densities. Very good agreement is obtained with existing elastic-scattering data for ${}^4$He energies between 100 and 400 MeV.

References in corpus (10)

• Chiral effective field theory and nuclear forces
• Three-body forces: From cold atoms to nuclei
• Local chiral effective field theory interactions and quantum Monte Carlo applications
• Isoscalar giant resonances in the Sn nuclei and implications for the asymmetry term in the nuclear-matter incompressibility
• Quantum Monte Carlo calculations of light nuclei with local chiral two- and three-nucleon interactions
• Nuclear mean field and double-folding model of the nucleus-nucleus optical potential
• Global optical potential for nucleus-nucleus systems from 50 MeV/u to 400 MeV/u
• Density Matrix Expansion for Low-Momentum Interactions
• A global microscopic description of nucleon-nucleus scattering with quantified uncertainties
• Dispersion relations applied to double-folding potentials from chiral EFT

Cited by in corpus (1)

• Optical potentials for the rare-isotope beam era