Calculations of electric and magnetic nuclear excitations beyond mean field

超出平均场的电和磁核激发的计算

• 批准号: 242472764
• 负责人: Professor Dr. Paul-Gerhard Reinhard
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/242472764?language=en
• 关键词: Calculations; electric; magnetic; nuclear; excitations

We refer in the present application explicitly to our previous DFG Grant. In the light of our recent publication [1] we have decided to apply for a much smaller grant with a modified program. The applicants are the authors of the above mentioned publication. Here we solved the longstanding task of reproducing simultaneously the electric giant dipole resonances in light and heavy nuclei. The problem was cured by considering many-particle correlations beyond mean-field and developing an appropriate Skyrme parametrization. This program will be extended to electric isoscalar excitations (as the excitations are not coupled to good isospin we refer here to predominately isoscalar excitations) and to unnatural parity excitations. Within this approach we will be able to predict more reliably low-lying collective isoscalar states as well as strength distributions of giant electric resonances. Our program includes also spin excitation and charge exchange resonances (e.g. Gamow-Teller resonances) in stable and unstable nuclei. The results have implications for the FAIR facility and as input for astrophysical applications.

我们在本申请中明确提及我们先前的DFG赠款。鉴于我们最近的出版物[1]，我们决定申请一个小得多的补助金，并修改计划。申请人是上述出版物的作者。在这里，我们解决了长期的任务，同时再现电巨偶极共振轻，重核。通过考虑平均场之外的多粒子相关性和发展适当的Skyrme参数化，解决了这个问题。这个程序将被扩展到电等激子激发（因为激发不耦合到好的同位旋，我们在这里指的是占主导地位的等激子激发）和不自然的宇称激发。在这种方法中，我们将能够更可靠地预测低洼集体等熵态以及巨电共振的强度分布。我们的程序还包括自旋激发和电荷交换共振（例如伽莫夫-泰勒共振）在稳定和不稳定的核。这些结果对FAIR设施和天体物理应用的输入有影响。