Airy structure in O-16+C-14 nuclear rainbow scattering

作者：Ohkubo S^*; Hirabayashi Y

来源：PHYSICAL REVIEW C, 2015, 92(2): 024624.

DOI：10.1103/PhysRevC.92.024624

The Airy structure in O-16 + C-14 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 O-16 by using a density-dependent nucleon-nucleon force. The experimental angular distributions at E-L = 132, 281, and 382.2 MeV are well reproduced by the calculations. By studying the energy evolution of the Airy structure, the Airy minimum around theta = 76 degrees in the angular distribution at E-L = 132 MeV is assigned as the second-order Airy minimum A2 in contrast to the recent literature which assigns it as the third order A3. The Airy minima in the 90 degrees excitation function is investigated in comparison with well-known O-16 + O-16 and C-12 + C-12 systems. Evolution of the Airy structure into the molecular resonances with the O-16 + C-14 cluster structure in the low-energy region around E-c.m. = 30 MeV is discussed. It is predicted theoretically for the first time for a non-4N O-16 + C-14 system that Airy elephants in the 90 degrees excitation function are present.

• 出版日期2015-8-31