ausblenden:
Schlagwörter:
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MPINP:
Starke Wechselwirkung und exotische Kerne – Abteilung Blaum
Zusammenfassung:
We develop for the first time a microscopic global nucleon-nucleus
optical potential with quantified uncertainties suitable for analyzing
nuclear reaction experiments at next-generation rare-isotope beam
facilities. Within the improved local density approximation and without
any adjustable parameters, we begin by computing proton-nucleus and
neutron-nucleus optical potentials from a set of five nuclear forces
from chiral effective field theory for 1800 target nuclei in the mass
range 12 < A < 242 for energies between 0 MeV < E < 150 MeV. We then
parameterize a global optical potential for each chiral force that
depends smoothly on the projectile energy as well as the target nucleus
mass number and isospin asymmetry. Uncertainty bands for elastic
scattering observables are generated from a full covariance analysis of
the parameters entering in the description of our global optical
potential and benchmarked against existing experimental data for stable
target nuclei. Since our approach is purely microscopic, we anticipate a
similar quality of the model for nucleon scattering on unstable
isotopes.
