论文标题
带有群集结构($ 4 \ le A \ le 16 $)的轻$ p $ - 壳核的核物质
Light $p$-shell nuclei with cluster structures ($4 \le A \le 16$) in nuclear matter
论文作者
论文摘要
计算热和密集的核物质的组成,包括$ 1p $ -shell nuclei $ 4 \ le a \ le 16 $。中等移位,尤其是Pauli阻塞,是由核的固有波函数确定的。结果是在壳波函数的壳模型中给出的。壳模型并不总是很好地描述光核。 “聚集”核$^8 $由于$α$样的聚类而表现出很强的相关效果。固有的集群结构对于nuclei $^6 $ li,$^7 $ li,$^7 $ be和$^9 $ be也很重要。相对罕见的元素li,be和b对饱和密度附近物质的状态方程(EOS)的贡献被高估了,例如核统计平衡(NSE)模型。两者都考虑了连续相关性的处理和中等事物修改的说明,以贡献$^5 $ HE和$^4 $ H簇。与包括不稳定核在内的扩展NSE相比,相应的p $ _ {3/2} $通道的贡献,$ a = 5,z = 2 $和p $ _ {2} $ a = 4 = 4,z = 1 $,对EOS对EOS的高度抑制了Pauli blovi blovi blovi blovi blovi blovie blovie the Highenties。对于光$ p $ - 壳核的结合能的偏移,给出了简单的拟合公式,以计算在广泛的参数范围内热和密集物质的组成。
The composition of hot and dense nuclear matter is calculated including the $1p$-shell nuclei $4 \le A \le 16$. In-medium shifts, in particular Pauli blocking, are determined by the intrinsic wave function of the nuclei. Results are given within a shell-model approach for the nucleon wave function. Light nuclei are not always well described by the shell model. The 'clustered' nucleus $^8$Be exhibits strong correlation effects because of $α$-like clustering. Intrinsic cluster structures are also significant for the nuclei $^6$Li, $^7$Li, $^7$Be, and $^9$Be. The contribution of the relatively rare elements Li, Be, and B, to the equation of state (EoS) of matter near the saturation density is overestimated in simple approaches such as the nuclear statistical equilibrium (NSE) model. Both, the treatment of continuum correlations and the account of in-medium modifications are considered for the contribution of $^5$He and $^4$H clusters. Compared to the extended NSE including unstable nuclei, the contributions of the corresponding P$_{3/2}$ channel with $A=5, Z=2$ and P$_{2}$ channel with $A=4, Z=1$, respectively, to the EoS are strongly suppressed at high densities owing to Pauli blocking effects. For the shifts of the binding energies of the light $p$-shell nuclei, simple fit formula are given to calculate the composition of hot and dense matter in a wide parameter range.