$^{16}$ O+ $^{12}$ C非弹性彩虹散射中的折射效应和Airy结构
Refractive effects and Airy structure in inelastic $^{16}$O+$^{12}$C rainbow scattering
摘要：
在入射能量为170、181、200、260和281 MeV时，测量了$^{16}$ O + $^{12}$ C对$2^+$（4.44 MeV）态的非弹性彩虹散射.用耦合道方法对实验结果进行了系统的分析，并从微观$α$团簇模型和有限程密度依赖的核子-核子力计算的$^{12}$ C和$^{16}$ O的实际波函数导出了扩展的双折叠势.对测量的非弹性散射数据的耦合道分析一致地显示了一些Airy-类似结构的非弹性散射截面的第一$2^+$状态的$^{12}$ C，这是有点模糊，仍然不能清楚地看到在测量数据。通过分析确定了Airy极小值，并研究了Airy结构的系统能量演化。与弹性散射相比，非弹性散射中的Airy极小值向后移动。
英文摘要：
Inelastic $^{16}$O +$^{12}$C rainbow scattering to the $2^+$ (4.44 MeV) state of $^{12}$C was measured at the incident energies, $E_L$ = 170, 181, 200, 260 and 281 MeV. A systematic analysis of the experimental angular distributions was performed using the coupled channels method with an extended double folding potential derived from realistic wave functions for $^{12}$C and $^{16}$O calculated with a microscopic $α$ cluster model and a finite-range density-dependent nucleon-nucleon force.The coupled channels analysis of the measured inelastic scattering data shows consistently some Airy-like structure in the inelastic scattering cross sections for the first $2^+$ state of $^{12}$C, which is somewhat obscured and still not clearly visible in the measured data. The Airy minimum was identified from the analysis and the systematic energy evolution of the Airy structure was studied. The Airy minimum in inelastic scattering is found to be shifted backward compared with that in elastic scattering.
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