Refractive versus resonant diffraction scattering of loosely bound6Li nuclei

Abstract

We present a complete analysis of elastic scattering 6 Li+ 16 O at 4 and 5 MeV/nucleon. Using either traditional Woods-Saxon or a range of semi-microscopic folding form-factors we find that the data require deep, highly transparent potentials. Physically relevant solutions are selected according to dispersion relation. The intermediate angle structures and the oscillatory increase of the cross section at large angles is interpreted either as a pre-rainbow oscillation resulting from the interference of the barrier and internal barrier far-side scattering subamplitudes, or, equally well, as a resonant diffraction arising from two Regge poles located in peripheral waves. Both semi-classical and Regge pole approaches allow a dynamical separation of the resonant component of the S-matrix.

Nuclear astrophysics studies at NIPNE

“…These are: -support for IMNA: we have a long-term program to understand and describe reactions between nuclei, including those with RIB. For this purpose, we work with prof. F. Carstoiu on the problem of optical model potentials [11]; -the evaluation of the contribution of excited states in reactions and processes that take place in hot stellar plasmaprof. Alexandrina Petrovici and her group [12]; baryonic equation of state under extreme conditionsprof.…”