Single-particle strength along the Ca isotopic chain and neighbouring nuclei

沿 Ca 同位素链和邻近原子核的单粒子强度

• 批准号: 2431536
• 金额: --
• 依托单位: University of York
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2431536
• 关键词: Single; particle; strength; along; Ca

This project addresses the following fundamental questions: How do long- and short-range nucleon-nucleon correlations deplete the single-particle strength in asymmetric atomic nuclei? Answering this question for asymmetric nuclei is essential not only for understanding and modeling nuclear structure of finite nuclei far from stability but also to accurately account for the effects of correlations in systems such as neutron stars. Moreover, studying strong correlations between quasi-particles in a Fermi liquid connects to other fields of physics through the quantality parameter and the delocalization of its constituents. Recent experimental results in the Oxygen isotopic chain employing quasi-free scattering reactions (QFS) have contradicted earlier studies at lower beam energies, which had suggested an unexpected strong dependency of the single particle strength with isospin asymmetry. This has sparked a strong debate in the community and has called for further investigations using this suitable QFS reaction tool to extend the study towards a wider region of the nuclear chart. This experimental project concentrates in the Ca isotopic chain and in neighbouring nuclei. The experimental work is carried out at R3B aparatues at GSI, Germany.

该项目解决了以下基本问题：如何长和短距离核子核子关联消耗单粒子强度在不对称原子核？将这个问题用于非对称核不仅对于理解和模拟远离稳定性的有限核的核结构是必不可少的，而且对于准确地解释中子星等系统中相关性的影响也是必不可少的。此外，研究费米液体中准粒子之间的强相关性通过其组分的量子参数和离域性与物理学的其他领域联系起来。最近的实验结果在氧同位素链采用准自由散射反应（QFS）相矛盾的早期研究在较低的光束能量，这表明了一个意想不到的强烈依赖的单粒子强度与同位旋不对称性。这在社区中引发了强烈的争论，并呼吁使用这种合适的QFS反应工具进行进一步的调查，以将研究扩展到更广泛的核图表区域。这个实验项目集中在钙同位素链和邻近的核。实验工作在德国GSI的R3 B实验室进行。