Refractive elastic scattering of carbon and oxygen nuclei: The mean field analysis and Airy structures

Abstract

The experimental data on the ${}^{16}$O${+}^{12}$C and ${}^{18}$O${+}^{12}$C elastic scatterings and their optical model analysis are presented. Detailed and complete elastic angular distributions have been measured at the Strasbourg Vivitron accelerator at several energies covering the energy range between 5 and 10 MeV per nucleon. The elastic scattering angular distributions show the usual diffraction pattern and also, at larger angles, refractive effects in the form of nuclear rainbow and associated Airy structures. The optical model analysis unambiguously shows the evolution of the refractive scattering pattern. The observed structure, namely the Airy minima, can be consistently described by a nucleus-nucleus potential with a deep real part and a weakly absorptive imaginary part. The difference in absorption in the two systems is explained by an increased imaginary (mostly surface) part of the potential in the ${}^{18}$O${+}^{12}$C system. The relation between the obtained potentials and those reported for the symmetrical ${}^{16}$O${+}^{16}$O and ${}^{12}$C${+}^{12}$C systems is drawn.

10 pages, 9 figures, Phys. rev. C in press

References in corpus (1)

• Airy-like patterns in heavy ion elastic scattering

Cited by in corpus (12)

• Nuclear rainbow scattering and nucleus-nucleus potential
• Refractive effects in the scattering of loosely bound nuclei
• Improved Nearside-Farside Decomposition of Elastic Scattering Amplitudes
• Improved Nearside-Farside Method for Elastic Scattering Amplitudes
• Evidence for a secondary bow in Newton's zero-order nuclear rainbow
• Refractive effects and Airy structure in inelastic ${}^{16}$O+${}^{12}$C rainbow scattering
• Similarity between nuclear rainbow and meteorological rainbow -- evidence for nuclear ripples
• Airy structure in ${}^{16}$O+${}^{14}$C nuclear rainbow scattering
• Peripheral elastic and inelastic scattering of 17,18O on light targets at 12 MeV/nucleon
• Existence of inelastic supernumerary nuclear rainbow in ${}^{16}$O+${}^{12}$C scattering
• Farside-dominant quasinuclear rainbow in refractive $\alpha$+$\alpha$ scattering
• Systematics of supernumerary nuclear rainbow in inelastic ${}^{16}$O+${}^{12}$C scattering