RUI : Shell Structure of Exotic Neutron-rich Nuclei

这是一个吸引乌尔辛斯学院本科生参与实验核结构研究的项目。该项目是与国家超导回旋实验室(NSCL)和佛罗里达州立大学(FSU)的同事们正在进行的合作的一部分，涉及NSCL的实验工作。我们将在NSCL通过单质子敲除和逆运动学质子散射测量来研究奇异的、富含中子的原子核的壳层结构。组成原子核的质子和中子填充一系列类似于原子电子填充的壳层。许多核性质是由壳层结构决定的，包括原子核的形状，激发态的能量和寿命，以及质子和中子在激发时协同作用的程度。最近对具有比质子多得多的中子的奇异核的研究表明，核壳层结构可以随着中子数的增加而移动。这项拟议的工作将有助于扩大对壳体结构从稳定到稳定演变的理解。该项目的一个中心目标是在乌尔辛斯学院校园内保持积极的核结构研究计划。乌尔辛努斯学院是一所全国性的文理学院，拥有约1600名学生，在理科方面有着悠久的历史。这个项目将为学生提供在课堂之外应用他们的物理知识，获得数据获取和分析的实用技能，观察和参与核加速器设施的操作，并向同事展示他们的工作的机会。参与者将前往NSCL进行实验，并在乌尔辛斯分析数据。他们将把他们的成果作为乌尔辛斯大学暑期研究员计划的一部分提交给乌尔辛斯社区，并在美国物理学会/核物理分部的会议上向核物理界介绍他们的结果。

This is a project engaging Ursinus College undergraduates inexperimental nuclear structure research. The project is part of anongoing collaboration with colleagues at the National SuperconductingCyclotron Laboratory (NSCL) and Florida State University (FSU)involving experimental work at the NSCL. We will investigate shellstructure in exotic, neutron-rich nuclei via one-proton knockout andinverse-kinematics proton scattering measurements at the NSCL.The protons and neutrons that compose an atomic nucleus fill a series ofshells similar to the shells filled by atomic electrons. Many nuclearproperties are determined by shell structure including the shape of thenucleus, the energies and lifetimes of excited states, and the degree towhich protons and neutrons act in concert in excitations. Recentinvestigations of exotic nuclei with many more neutrons than protonshave revealed that nuclear shell structure can shift with increasingneutron number. The proposed work will help to expand the understandingof the evolution of shell structure away from stability.A central goal of the project is to maintain an active researchprogram in nuclear structure on the Ursinus College campus. UrsinusCollege is a national liberal arts college of about 1600 students witha long history of strength in the sciences. This project will providestudents opportunities to apply their knowledge of physics outside theclassroom, gain practical skills in data acquisition and analysis,observe and participate in the operation of a nuclear acceleratorfacility, and present their work to colleagues. Participants willtravel to the NSCL to perform experiments and analyze the data atUrsinus. They will present their results to the Ursinus community aspart of the Ursinus College Summer Fellows Program and to the nuclearphysics community at American Physical Society/Division of NuclearPhysics meetings.