We investigate the property of the high-density nuclear matter probed by thenucleus-nucleus elastic scattering in the framework of the double-folding (DF)model with the complex $G$-matrix interaction. The medium effect includingthree-body-force (TBF) effect is investigated with present two methods based onthe frozen density approximation (FDA). The medium effect is clearly seen onthe potential and the elastic cross section for the $^{16}$O + $^{16}$O systemat $E/A =$ 70 MeV. The crucial role of the medium effect is also confirmed withother effective nucleon-nucleon ($NN$) interactions. In addition, the presentmethods are applied to other heavy-ion elastic scattering systems. Again, themedium effect is clearly seen in the heavy-ion elastic cross section. Themedium effect on the elastic cross section becomes invisible with the increaseof the target mass and the incident energy (up to $E/A =$ 200 MeV). However,the medium effect is again important to fix the heavy-ion scattering over $E/A=$ 200 MeV. Finally, we make clear the crucial role of the TBF effect up to$k_F =$ 1.6 fm$^{-1}$ in the nucleus-nucleus elastic scattering.
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机译：我们研究了具有复杂$ G $-矩阵相互作用的双折叠（DF）模型框架中由核-核弹性散射探测的高密度核物质的性质。基于冷冻密度近似法（FDA），目前的两种方法研究了包括三体力（TBF）效应在内的中等效应。在$ E / A = $ 70 MeV下，对于$ ^ {16} $ O + $ ^ {16} $ O系统的势和弹性横截面可以清楚地看到中等效果。其他有效的核子-核子（$ NN $）相互作用也证实了中等效应的关键作用。另外，本发明方法可应用于其他重离子弹性散射系统。同样，在重离子弹性截面中可以清楚地看到theme效应。随着目标质量和入射能的增加（最高$ E / A = $ 200 MeV），对弹性截面的影响变得不可见。但是，介质效应对于固定重离子在$ E / A = $ 200 MeV上的散射又很重要。最后，我们弄清楚了直到$ k_F = $ 1.6 fm $ ^ {-1} $的TBF效应在核-核弹性散射中的关键作用。
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