Lifetimes of low-spin excitations in the A=100 mass region

A=100 质量区域中低自旋激发的寿命

• 批准号: 405855296
• 负责人: Professor Dr. Andreas Zilges
• 金额: --
• 依托单位: Institut für Kernphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/405855296?language=en
• 关键词: Lifetimes; low; spin; excitations; A=100

Atomic nuclei show excitations which have - despite the complexity of the many-body quantum system - rather simple structures. This includes, e.g., collective vibrations of the nuclear surface or shape coexistence, i.e., different shapes of the ground state and excited states of a nucleus. One very important observable to get a deeper understanding is the lifetime of these excitations. However, an absolute measurement of lifetimes poses many experimental challenges and data for a comparison with theory is rather scarce.We have improved the so-called DSA technique by measuring the projectile which has been used to excite the nucleus as well as the gamma rays which are emitted during the decay. This allows us to extract reliable lifetimes for a number of excitations in a single experiment. In this project, we plan to investigate nuclei near the magic Z=50 shell. In those nuclei many of the features described above are expected.

尽管多体量子系统很复杂，原子核的激发态结构却相当简单。这包括，例如，核表面的集体振动或形状共存，即，原子核基态和激发态的不同形状。一个非常重要的观察，以获得更深入的理解是这些激发的寿命。然而，绝对测量的寿命提出了许多实验挑战和数据与理论比较是相当稀缺的。我们已经改进了所谓的DSA技术，通过测量已被用来激发核以及在衰变过程中发射的伽马射线的弹丸。这使我们能够提取可靠的寿命为一个单一的实验中的一些激励。在这个项目中，我们计划研究Z=50魔壳层附近的原子核。在这些细胞核中，上述许多特征都是预期的。