Systematics of supernumerary nuclear rainbow in inelastic 16O+12C scattering
Nguyen Hoang Phuc, Nguyen Tri Toan Phuc & Do Cong Cuong
Phys. Rev. C 110, 044608
Abstract:
We perform a systematic study of inelastic nuclear rainbow scattering for the 16O +12C system to the 2+ (4.44 MeV) state of 12C at incident energies of 100–608 MeV with the coupled-channels method. The recently generalized nearside-farside decomposition for inelastic scattering was applied in combination with the multichannel deflection function analysis to elucidate the origin of the nuclear rainbow phenomenon and the suppression of the primary and supernumerary Airy minima in the inelastic-scattering cross section. The systematic evolution of the Airy minima for the excited 2+ (4.44 MeV) state of 12C was unambiguously determined. Our work suggests that there is no clear shift in the positions of the first Airy minima and a small shift at low energies for the second and third Airy minima between the inelastic- and elastic-scattering cross sections. Using the 𝐾-subamplitudes splitting technique combined with the generalized nearside-farside decomposition and deflection function, the distinct refractive pattern commonly suppressed in the inelastic heavy-ion scattering can be interpreted and provides new insights into the relationship between elastic and inelastic nuclear rainbow scattering.
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