2015/11/23 by S. Ohkubo, Y. Hirabayashi, A. A. Ogloblin · 13 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysical Phenomena and Observations #Computer science #High-pressure geophysics and materials #Pulsars and Gravitational Waves Research #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.92.051601
published in Physical Review C 92(5) (American Institute of Physics) · 5 pages, 4 figures
openalex publication_date 2015/11/23 · arxiv created 2015/11/25 · arxiv updated 2015/11/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The existence of a secondary bow is confirmed for 13C+12C nuclear rainbow scattering in addition to the 16O+12C system. This is found by studying the experimental angular distribution of 13C+12C scattering at the incident 13C energy EL=250\phantom\rule0.16em0exMeV with an extended double-folding (EDF) model that describes all the diagonal and off-diagonal coupling potentials derived from the microscopic wave functions for 12C using a density-dependent nucleon-nucleon force. The Airy minimum at \ensuremathθ\phantom\rule0.16em0ex\ensuremath≈70^\ensuremath∘, which is not reproduced by a conventional folding potential, is revealed to be a secondary bow generated dynamically by a coupling to the excited state 2+ (4.44 MeV) of 12C. The essential importance of the quadruple Y2 term (reorientation term) of potential of the excited state 2+ of 12C for the emergence of a secondary bow is found. The mechanism of the secondary bow is intuitively explained by showing how the trajectories are refracted dynamically into the classically forbidden angular region beyond the rainbow angle of the primary rainbow.