论文标题
pygmy偶极子共振的等镜特征：一种微妙的对称能量游戏
The isoscalar features of Pygmy Dipole Resonance: a subtle game of symmetry energy
论文作者
论文摘要
在量子多体处理中研究了pymmy偶极共振（PDR）的振动结构，具有扩展的可分离相互作用，能够编码核对称能量对密度的依赖性。根据中子皮肤的组合动力学和核心等级极化，在重现巨型偶极子共振的同位物质的同时，确定了PDR的新图片。与对称能量的密度变化所起的关键作用在塑造低洼偶极子响应及其等速膜 - 分离器结构中所起的关键作用。我们的结果为阐明从皮肤振荡到高度散装集体动态的过渡提供了挑战提供了见解。
The vibrational structure of the Pygmy Dipole Resonance (PDR) is investigated within a quantum many-body treatment with extended separable interactions able to encode the dependence of nuclear symmetry energy on density. A new picture of PDR is unveiled in terms of a combined dynamics of the neutron skin and of the core isovector polarization, which determines the isoscalar features of PDR while reproducing the isovector properties of Giant Dipole Resonance. The key role played by the variation with density of the symmetry energy on shaping the low-lying dipole response and its isoscalar-isovector structure is underlined. Our results provide insights for the challenge of clarifying the transition from skin oscillation to a highly bulk collective dynamics.
