U.S.-Japan Cooperative Research: Mass Measurements of rp-Process Nuclei Near the Proton Drip Line

美日合作研究：质子滴水线附近 rp 过程核的质量测量

• 批准号: 0735989
• 负责人: Michael Famiano
• 金额: $ 1.81万
• 依托单位: Western Michigan University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0735989&HistoricalAwards=false
• 关键词: U.S.; Japan; Cooperative; Research; Mass

OISE-0735989 (Famiano)AbstractThis award facilitates the initiation of a U.S.-led experimental program and international collaboration in nuclear astrophysics at Japan's RIKEN Radioactive Ion Beam Factory (RIBF), regarded as the most outstanding radioactive ion beam facility in the world. The origin of the elements remains one of the largest unanswered questions in nuclear physics. In particular, nucleosynthesis processes involving nuclei far from stability (the rp- and r-processes) remain largely untested. The experiment in this U.S.-Japan collaboration will measure the masses of atomic nuclei relevant to the astrophysical rp-process, the nuclear process thought to fuel x-ray bursts. These masses will be measured using the TOF-technique; that is, the time-of-flight of nuclei of known momentum in the beam will be measured between two points in the beamline. Knowing these nuclear masses will allow a better understanding of the light emission profile in an x-ray burst. Primary collaborators in Japan include Toshiyuki Kubo of the RIBF, Shigeru Kubono of the University of Tokyo, and Toshitaka Kajino of the University of Tokyo. Four U.S. graduate students and one post-doctoral researcher will participate in the project, which is jointly funded by the Office of International Science & Engineering and the Division of Physics. The award also supports planning for the next stage of a longer-term international collaboration between scientists in the United States and Japan.

OISE-0735989（FAMIANO）摘要这一奖项促进了日本Riken放射性离子光束工厂（RIBF）的美国领导的实验计划和国际核天体物理学合作，被视为世界上最出色的放射性离子光束设施。 元素的起源仍然是核物理学中最大的未解决问题之一。特别是，涉及核的核合成过程远非稳定性（RP和RPORACESSES）在很大程度上未经测试。这项美国与日本合作的实验将测量与天体物理RP-Process相关的原子核的质量，即被认为是为X射线爆发的核过程。这些质量将使用TOF技术进行测量；也就是说，梁中已知动量的核的飞行时间将在梁线中的两个点之间进行测量。 了解这些核质量将可以更好地理解X射线爆发中的光发射曲线。 日本的主要合作者包括Ribf的Toshiyuki Kubo，东京大学的Shigeru Kubono和东京大学的Toshitaka Kajino。四名美国研究生和一名博士后研究员将参加该项目，该项目由国际科学与工程办公室共同资助。该奖项还支持计划在美国和日本科学家之间长期国际合作的下一阶段的计划。