论文标题
核核核核核衍射中核泡的烙印
Imprint of nuclear bubble in nucleon-nucleus diffraction
论文作者
论文摘要
背景：大多数核的密度在中央区域是恒定的，并且表面平稳降低。核密度中央部分的耗竭可以具有导致形成“气泡”核的核结构效应。但是，探测核内部的密度曲线通常非常具有挑战性。 目的：本文的目的是研究核气泡结构，并使用核定核子散射，并量化对核表面剖面的影响。 方法：我们在Glauber模型的宙斯盾下采用了高能核子核散射来分析各种反应可观察物，这有助于量化核泡。在将其应用于$^{28} $ si上，并用谐波振荡器（HO）密度测试，然后将其应用于均匀的$ n = 14 $ isotones之前，在$ 22 \ leq a \ leq a \ leq 34 $质量范围内，并从抗抗抑制性分子动力学（AMD）中获得了逼真的密度。 结果：使用HO密度来设计用于核气泡结构签名的HO密度来计算质子-U^{28} $ SI反应的弹性散射和质子的反应概率。然后，我们通过分析325、550和800 MEV入射能的弹性散射来量化$ n = 14 $ shipones的气泡结构程度。目前的分析表明，$^{22} $ o作为泡泡核的候选者，在$ n = 14 $ isotones中，在$ 22 \ leq a \ leq a \ leq 34 $质量范围内。 结论：我们已经表明，气泡结构信息印在核定核弹性散射差异横截面上，尤其是在第一个衍射峰中。气泡核倾向于具有更尖锐的核表面，并且变形似乎是其出现的障碍。
Background: The density of most nuclei is constant in the central region and is smoothly decreasing at the surface. A depletion in the central part of the nuclear density can have nuclear structure effects leading to the formation of "bubble" nuclei. However, probing the density profile of the nuclear interior is, in general, very challenging. Purpose: The aim of this paper is to investigate the nuclear bubble structure, with nucleon-nucleus scattering, and quantify the effect that has on the nuclear surface profile. Method: We employed high-energy nucleon-nucleus scattering under the aegis of the Glauber model to analyze various reaction observables, which helps in quantifying the nuclear bubble. The effectiveness of this method is tested on $^{28}$Si with harmonic-oscillator (HO) densities, before applying it on even-even $N = 14$ isotones, in the $22 \leq A \leq 34$ mass range, with realistic densities obtained from antisymmetrized molecular dynamics (AMD). Results: Elastic scattering differential cross sections and reaction probability for the proton-$^{28}$Si reaction are calculated using the HO density to design tests for signatures of nuclear bubble structure. We then quantify the degree of bubble structure for $N = 14$ isotones with the AMD densities by analyzing their elastic scattering at 325, 550 and 800 MeV incident energies. The present analyses suggest $^{22}$O as a candidate for a bubble nucleus, among even-even $N = 14$ isotones, in the $22 \leq A \leq 34$ mass range. Conclusion: We have shown that the bubble structure information is imprinted on the nucleon-nucleus elastic scattering differential cross section, especially in the first diffraction peak. Bubble nuclei tend to have a sharper nuclear surface and deformation seems to be a hindrance in their emergence.
