Nuclear electro-magnetic dipole modes: Skyrme-RPA predictions on flow patternand estimate of experimental accessibility

Skyrme力自洽平均场模型是描述核结构和动力学的可靠工具。在本项目中，我们应用完全自洽的Skyrme随机相位近似（RPA）模型的激发通道的特别感兴趣的球形和变形的核。首先，我们将继续分析低能量E1强度（LES），通常表示为侏儒偶极共振。它提供了关于核状态方程的重要信息，特别是在等矢量通道中，低能区的光子截面对于天体物理应用至关重要。我们将集中在尚未充分理解，但重要的LES方面：i）核变形的影响，ii）与其他核观测值（例如状态方程）的相关性，以及iii）低能偶极模式（环形与压缩模式）的内在结构。将特别注意开发的大涡模拟实验探索的非弹性电子散射和其他反应的建议，使用达姆施塔特技术大学的设施。其次，我们将解决E0模式在球形和变形的核。其目的是解决一个悬而未决的难题，在封闭壳层和开放壳层核的E0模式的同时描述。第三，我们将继续我们的研究磁模式。特别是，自旋翻转模式将被认为是在球形和变形的核。这些模式可以提供关于Skyrme泛函的自旋相关部分的有价值的信息（例如，自旋轨道和张量项）。在项目的所有部分，将涵盖各种各样的核，稳定的和外来的（包括滴线和超重）。

Self-consistent mean-field models with Skyrme forces are reliable tools for describing nuclear structure and dynamics. In the present project, we apply the fully self-consistent Skyrme random - phase - approximation (RPA) models to excitation channels of a particular interest in spherical and deformed nuclei. First, we will continue to analyze the low-energy E1 strength (LES), often denoted as a pygmy dipole resonance. It delivers important information on the nuclear equation of state, particularly in the isovector channel, and the photon cross sections in the low-energy regime are crucial for astrophysical applications. We will concentrate on yet poorly understood but essential LES aspects: i) the impact of nuclear deformation, ii) the correlation with other nuclear observables (e.g. equation of state), and iii) the intrinsic structure of the low energy dipole modes (toroidal versus compressional mode). Special attention will be paid to develop proposals for experimental exploration of LES in inelastic electron scattering and other reactions, using the facilities of Technical University of Darmstadt. Second, we will address E0 modes in spherical and deformed nuclei. The aim is to resolve a yet pending puzzle in the simultaneous description of E0 modes in closed-shell and open-shell nuclei. Third, we will continue our study of magnetic modes. In particular, the spin-flip modes will be considered in both spherical and deformed nuclei. These modes may provide valuable information about the spin-dependent part of the Skyrme functional, (e.g., spin-orbit and tensor terms). In all parts of the project, a large variety of nuclei, stable and exotic (including drip-line and super-heavy), will be covered.