2025/07/15 by J. Rangel, B. Pinheiro, Rangel, J. +9
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Nuclear Theory (nucl-th) #Nuclear physics research studies #Quantum chaos and dynamical systems
paper · pdf · doi:10.48550/arxiv.2507.11050
openalex publication_date 2025/07/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
\begindescription \item[Background] Fusion reactions play an important role in nucleosynthesis and in applications to society. Yet they remain challenging to model. \item[Purpose] In this work, we investigate the features of the nucleus-nucleus potentials that describe fusion cross sections and compare with those needed for realistic calculations of elastic scattering and other direct-reaction cross sections. \item[Method] We perform coupled-channel calculations for studying elastic and fusion reactions around the Coulomb barrier with a tightly bound projectile (16O+144Sm). We also perform Continuum Discretized Coupled Channel calculations to study elastic (8B+58Ni) and fusion (6Li+198Pt) of loosely bound projectiles in the same energy regime. \item[Results] We contrast the coupled-channel results with those obtained in a single-channel solution with different assumptions for polarization potentials to shed light on the relevant absorption terms required for the two different reaction channels. \item[Conclusions] Our results suggest that different approximations may be required for modeling direct processes and for modeling fusion reactions. \enddescription