U.S.-Japan Cooperative Science: Collision Dynamics of Nuclei with High Isospin Asymmetry

美日合作科学：高同位旋不对称性原子核的碰撞动力学

• 批准号: 0124186
• 负责人: ManYee Tsang
• 金额: $ 3.6万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-01-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0124186&HistoricalAwards=false
• 关键词: U.S.; Japan; Cooperative; Science; Collision

0124186TsangThis award supports a two-year collaborative research project between Professor ManYee B Tsang at Michigan State University and Professor Akira Ono of Tohoku University in Japan. The researchers will undertake a study of collision dynamics of nuclei with high isospin asymmetry. The focus of this project is the theoretical interpretation of nuclear multifragmentation, a process that may provide insight into the liquid-gas phase transition of nuclear matter and the equation of the state of asymmetric nuclear matter. The first goal will be to study the role of symmetry energy in the production of isotopes in heavy ion collisions. The second goal will be to develop transport equations that accurately describe the isotopic yields and to compare the predictions of these equations to a wide variety of experimental data produced in central collisions. The third goal is to isolate experimental signals that are especially sensitive to the non-equilibrium aspects of the multifragment break up. Included in this latter effort will be the study of processes such as the neck fragmentation, for example, that are expected to be rather sensitive to the interplay between reaction dynamics and fragment formation. The project brings together the efforts of two laboratories that have complementary expertise and research capabilities. The Japanese scientists pioneered the development of the Antisymmetrized Molecular Dynamics (AMD) Model and the U.S. scientists have expertise in the development of Boltzmann-Uehling-Uhlenbeck (BUU) transport equations. It is anticipated that the research will benefit the development of quantal reaction models. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation. The project advances international human resources through the participation of a postdoc and a graduate student. The researchers plan to publish results of the research in scientific journals and report on the findings at scientific meetings.

0124186Tsang该奖项支持密歇根州立大学ManYee B Tsang教授和日本东北大学Akira Ono教授之间为期两年的合作研究项目。 研究人员将对具有高度同位旋不对称性的原子核的碰撞动力学进行研究。 该项目的重点是核多碎裂的理论解释，这一过程可以深入了解核物质的液-气相变和不对称核物质的状态方程。 第一个目标是研究对称能在重离子碰撞中同位素产生中的作用。 第二个目标是开发准确描述同位素产量的输运方程，并将这些方程的预测与中心碰撞中产生的各种实验数据进行比较。 第三个目标是分离对多片段分解的非平衡方面特别敏感的实验信号。 后一项工作将包括对颈部碎裂等过程的研究，预计这些过程对反应动力学和碎片形成之间的相互作用相当敏感。 该项目汇集了两个具有互补专业知识和研究能力的实验室的努力。日本科学家率先开发了反对称分子动力学 (AMD) 模型，美国科学家在开发玻尔兹曼-乌林-乌伦贝克 (BUU) 输运方程方面拥有专业知识。 预计该研究将有利于量子反应模型的发展。通过思想和技术的交流，该项目将拓宽我们的基础知识基础，促进国际理解与合作。 该项目通过博士后和研究生的参与推进国际人力资源。 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。