Constraints on neutron skin thickness in Pb-208 and density-dependent symmetry energy
Constraints on neutron skin thickness in Pb-208 and density-dependent symmetry energy
复制标题
Pb-208 中子皮厚度的约束和密度相关的对称能
DOI：
10.1103/physrevc.91.034315
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发表时间：
2015
影响因子：
3.1
通讯作者：
Gu Jianzhong
中科院分区：
文献类型：
--
作者：
Dong Jianmin;Zuo Wei;Gu Jianzhong
准确了解中子皮厚度对核物理和天体物理的不同领域具有深远的意义。然而，新的引线半径实验（PREX）并没有产生任何严格的约束。我们采用了一种更实用的方法来探测中子皮厚度，它是基于核物质在饱和密度下的对称能（系数）与之间的高度线性相关性。因此，一个精确的值对。与PREX中的宇称违反不对称性相比，由于有大量的核质量和衰变能的测量数据，因此更容易获得可靠的实验信息。对称能的密度依赖性也受到很好的约束。最后，我们用“断层扫描”方法发现，只要测量从fm开始的核子密度，就可以得到强子散射实验，而不考虑强吸收对强子内部轮廓的影响。
Accurate knowledge about the neutron skin thicknessinhas far-reaching implications for different communities of nuclear physics and astrophysics. Yet, the novel lead radius experiment (PREX) did not yield any stringent constraint onrecently. We employ a more practicable strategy to probe the neutron skin thickness ofbased on a high linear correlation between theand, whereandare the symmetry energy (coefficient) of nuclear matter at saturation density and of. An accuratethus places a strong constraint on the. Compared with the parity-violating asymmetryin the PREX, the reliably experimental information on theis much more easily available thanks to the wealth of measured data on nuclear masses and decay energies. The density dependence of the symmetry energy is also well constrained with the. Finally, with a “tomoscan” method, we find that one just needs to measure the nucleon densities instarting fromfm to obtain thein hadron scattering experiments, regardless of its interior profile being hampered by strong absorption.