This study systematically investigates the influence of nuclear $\alpha$ clustering on transport properties using an extended quantum molecular dynamics model for the ${}^{16}\mathrm{O}+{}^{197}\mathrm{Au}$ and ${}^{16}\mathrm{O}+{}^{40}\mathrm{Ca}$ collision systems. The results show that different $\alpha$-cluster configurations of ${}^{16}\mathrm{O}$ lead to differences in the extracted system temperature $T$ and density $\rho$, with a tendency toward the ordering tetrahedral $>$ square $>$ kite $>$ chain. The sensitivity to the initial configurations is reduced in the heavier ${}^{16}\mathrm{O}+{}^{197}\mathrm{Au}$ system. The dependence of the shear viscosity $\eta$ and the viscosity-to-entropy density ratio $\eta /s$ on the initial $\alpha$-cluster structure is weaker, owing to the fact that $\eta$ and $\eta /s$ reflect the combined contributions of both temperature $T$ and density $\rho$.

Close

PrevNext

View figure in article

• Low & intermediate energy heavy-ion reactions
• Models & methods for nuclear reactions
• Nuclear matter
• Nuclear reactions
• Nucleon distribution
• Temperature
• Viscosity