U.S.-Japan Cooperative Science: Nuclei Far From Stability with Exotic Structure

该奖项支持密歇根州立大学的Thomas Glasmacher教授和日本东京大学的Hiroyushi Sakurai教授之间为期三年的合作研究项目。研究人员将对具有奇异结构的原子核进行远不稳定的研究。这项拟议的研究将是迄今为止规模最大的丰中子核系统研究，并采用补充方法。他们将结合密歇根州立大学国家超导回旋实验室(NSCL)和他们的日本合作者开发的实验方法和技术，有效地利用日本理化学研究所和NSCL提供的世界级奇异离子束。他们将研究丰中子核的结构变化，因为当它们接近中子滴线时，它们的束缚越来越少。这些实验将测量理论上相关和可计算的量，如激发能、约化跃迁矩阵元素和光谱因子。这些结果将被用于理论模型。该项目汇集了两个拥有互补专业知识和研究能力的实验室的努力。日本的量子蒙特卡罗程序目前允许进行世界上最大规模的壳模型计算，将其与NSCL开发的有效核力相结合，将极大地增强拟议合作中的理论视角。预计这项研究将极大地促进我们对核结构从稳定到电荷Z=28的最丰中子核的演化的理解。本研究通过博士后、研究生和本科生的参与，促进国际人力资源的发展。通过思想和技术的交流，这个项目将扩大我们的基础知识基础，促进国际理解与合作。研究人员计划在科学期刊上发表研究结果，并在科学会议上报告研究结果。

0089581GlasmacherThis award supports a three-year collaborative research project between Professor Thomas Glasmacher of Michigan State University and Professor Hiroyushi Sakurai of the University of Tokyo in Japan. The researchers will be undertaking a study of nuclei far from stability with exotic structure. The research proposed will be the largest systematic study of neutron-rich nuclei with complementary methods to date. They will combine the experimental methods and techniques developed at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State and by their Japanese collaborators to make efficient use of the world-class exotic ion-beams available at RIKEN in Japan and at the NSCL. They will study the changes in the structure of neutron-rich nuclei as they become less and less bound when approaching the neutron-dripline. The experiments will measure theoretically relevant and calculable quantities such as excitation energies, reduced transition matrix elements, and spectroscopic factors. These results will then be used in the theoretical models. The project brings together the efforts of two laboratories that have complementary expertise and research capabilities. Combining the Japanese quantum Monte Carlo codes, which currently allow the largest-scale shell model calculations in the world, with the effective nuclear forces developed at the NSCL will greatly enhance the theoretical perspective in the proposed collaboration. It is expected that the research will significantly advance our understanding of the evolution of nuclear structure from stability to the most neutron-rich nuclei with charge Z=28. This research advances international human resources through the participation of postdocs, graduate students and undergraduate students. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation. The researchers plan to publish results of the research in scientific journals and report on the findings at scientific meetings.