Medium effect in the high-density region probed by nucleus-nucleus elastic scattering

We investigate the sensitivity of the medium effect in the high-density region on nucleus-nucleus elastic scattering in the framework of the double-folding (DF) model with the complex $G$-matrix interaction. The medium effect including the three-body-force (TBF) effect is investigated with two methods. In both methods, the medium effect is clearly seen on the potential and the elastic cross section. Finally, we make clear the crucial role of the TBF effect up to $k_F=1.6$ ${\mathrm{fm}}^{-1}$ in nucleus-nucleus elastic scattering.

Figure 1

The real and imaginary parts of the DF potential with the $k_{\mathrm{cut}}$ value. The solid, dotted, dashed, dot-dashed, bold-solid, bold-dotted, bold-dashed, and bold-dot-dashed curves are the results with $k_{\mathrm{cut}}=1.8$, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, and 1.1 ${\mathrm{fm}}^{-1}$, respectively.

Figure 2

The elastic cross section with the DF potentials shown in Fig. 1. The meaning of the curves is the same as in Fig. 1. The experimental data are taken from Ref. [38].

Figure 3

The real and imaginary parts of the DF potential with the $k_{\mathrm{rep}.}$ value. The solid, dotted, dashed, dot-dashed, bold-solid, bold-dotted, bold-dashed, and bold-dot-dashed curves are the results with $k_{\mathrm{rep}.}=1.8$, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, and 1.1 ${\mathrm{fm}}^{-1}$, respectively.

Figure 4

The elastic cross section with the DF potentials shown in Fig. 3. The meaning of the curves is the same as in Fig. 3.