Abstract
The Airy structure in rainbow scattering is studied with an extended double-folding (EDF) model that describes all the diagonal and off-diagonal coupling potentials derived from the microscopic realistic wave functions for by using a density-dependent nucleon-nucleon force. The experimental angular distributions at , 281, and 382.2 MeV are well reproduced by the calculations. By studying the energy evolution of the Airy structure, the Airy minimum around in the angular distribution at MeV is assigned as the second-order Airy minimum in contrast to the recent literature which assigns it as the third order . The Airy minima in the excitation function is investigated in comparison with well-known and systems. Evolution of the Airy structure into the molecular resonances with the cluster structure in the low-energy region around MeV is discussed. It is predicted theoretically for the first time for a non- system that Airy elephants in the excitation function are present.
- Received 30 June 2015
DOI:https://doi.org/10.1103/PhysRevC.92.024624
©2015 American Physical Society