标题： 化合物核表面能系数在合成超重核中的重要性与$\textbf{Z=112-120}$ 显示英文标题

标题： Significance of the compound nucleus surface energy coefficients in the synthesis of the superheavy nuclei with $\textbf{Z=112-120}$

摘要： 本文研究了不同表面能系数对重离子融合反应中复合核衰变模式的影响，重点研究了范围内的超重核（SHN）$Z=112-118$。对于不同的表面不对称常数$k_{s}$和表面能常数$\gamma_{0}$，计算了蒸发残留物（ER）截面。在这些计算中，采用了双核系统模型和接近势，并考虑了形变核。将实验数据与这种理论方法进行比较，$k_{s}$和$\gamma_{0}$的最佳值分别为$0.7546$和$0.9180~\mathrm{MeV~fm^{-2}}$。 此外，这个新模型被用来研究实验上未知的更重系统与 $Z=119$ 和 $120$ 的合成概率。 存在五种有前景的组合来合成SHN与$Z=119$：a) ${^{249}}\mathrm{Cf}({^{45}}\mathrm{Sc},3n){^{291}}119$，b) ${^{249}}\mathrm{Cf}({^{45}}\mathrm{Sc},4n){^{290}}119$，c) ${^{247}}\mathrm {Bk}({^{50}}\mathrm{Ti},3n){^{294}}119$，d) ${^{254}}\mathrm{Es}({^{48}}\mathrm{Ca},3n){^{299}}119$，和e) ${^{254}}\mathrm{Es}({^{48}}\mathrm{Ca},4n){^{298}}119$。 此外，还发现合成 SHN 与$Z=120$的最佳组合是${^{249}}\mathrm{Cf}({^{50}}\mathrm{Ti},3n){^{296}}120$，以及${^{251}}\mathrm{Cf}({^{50}}\mathrm{Ti},3n){^{298}}120$。 显示英文摘要

摘要： This paper investigates the impacts of the different surface energy coefficients on the compound nucleus decay modes during heavy ion fusion reactions, with focus given to the superheavy nuclei (SHN) in the range of $Z=112-118$. The evaporation-residue (ER) cross sections were calculated for different surface asymmetric constants, $k_{s}$ and surface energy constants, $\gamma_{0}$. In these calculations, the di-nuclear system model and proximity potential, along with considering deformed nuclei, were employed. Comparing the experimental data and this theoretical approach, the best values of $k_{s}$ and $\gamma_{0}$ are $0.7546$ and $0.9180~\mathrm{MeV~fm^{-2}}$, respectively. Furthermore, this new model was used to investigate the probability of synthesis of experimentally unknown heavier systems with $Z=119$ and $120$. There exist five promising combinations to synthesize SHN with $Z=119$: a) ${^{249}}\mathrm{Cf}({^{45}}\mathrm{Sc},3n){^{291}}119$, b) ${^{249}}\mathrm{Cf}({^{45}}\mathrm{Sc},4n){^{290}}119$, c) ${^{247}}\mathrm {Bk}({^{50}}\mathrm{Ti},3n){^{294}}119$, d) ${^{254}}\mathrm{Es}({^{48}}\mathrm{Ca},3n){^{299}}119$, and e) ${^{254}}\mathrm{Es}({^{48}}\mathrm{Ca},4n){^{298}}119$. In addition, it is found that the best combinations to synthesize SHN with $Z=120$ are ${^{249}}\mathrm{Cf}({^{50}}\mathrm{Ti},3n){^{296}}120$, and ${^{251}}\mathrm{Cf}({^{50}}\mathrm{Ti},3n){^{298}}120$.