https://doi.org/10.1140/epja/s10050-025-01685-4
Regular Article - Theoretical Physics
Secondary bow with ripples in 
C+C rainbow scattering
1
Research Center for Nuclear Physics, Osaka University, 567-0047, Ibaraki, Japan
2
Information Initiative Center, Hokkaido University, 060-0811, Sapporo, Japan
Received:
14
July
2025
Accepted:
28
August
2025
Published online:
16
September
2025
We report, for the first time, the emergence of a secondary bow with ripples in C+C nuclear rainbow scattering. This finding was achieved by studying the experimental angular distributions in C+C scattering at incident energies 
= 240 and 300 MeV, utilizing an extended double-folding model. This model accurately describes all diagonal and off-diagonal coupling potentials derived from the microscopic wave functions for C. Although the observed angular distributions of rainbow scattering at large angles (approaching 
) are complicated by the symmetrization of two identical bosonic nuclei, the Airy minimum, associated with a dynamically generated secondary bow with ripples, is clearly identified at approximately 77
for 240 MeV in the fall-off region of the primary nuclear rainbow. This finding, along with previous findings in the 
O+C and 
C+C systems, reinforces the concept of a secondary bow in nuclear rainbow scattering.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
