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

这个项目解决了以下基本问题：长程和短程核子-核子关联如何耗尽不对称原子核中的单粒子强度？回答不对称核的这个问题不仅对于理解和模拟远离稳定性的有限核的核结构至关重要，而且对于准确地解释中子星等系统中的关联效应也是至关重要的。此外，通过研究费米液体中准粒子之间的强关联，通过量子参数及其成分的离域，将其与其他物理领域联系起来。最近在氧同位素链中利用准自由散射反应(QFS)的实验结果与以前在较低束流能量下的研究结果相矛盾，后者曾提出单粒子强度与同位旋不对称性的意外强烈相关性。这在社会上引发了激烈的辩论，并呼吁使用这一合适的QFS反应工具进行进一步调查，以将研究扩展到核图表的更广泛区域。这个实验项目集中在钙同位素链和邻近的原子核中。实验工作在德国GSI的R3B公寓进行。

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.