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）摘要该奖项有助于启动美国-在被认为是世界上最杰出的放射性离子束设施的日本RIKEN放射性离子束工厂（RIBF）领导的核天体物理学实验计划和国际合作。 元素的起源仍然是核物理学中最大的未解问题之一。特别是，涉及远离稳定核的核合成过程（rp-和r-过程）在很大程度上仍未得到验证。在美国的实验-日本的合作将测量与天体物理学rp过程相关的原子核质量，rp过程被认为是x射线爆发的燃料。这些质量将使用TOF技术测量;也就是说，将在束线中的两个点之间测量束中已知动量的核的飞行时间。 了解这些核质量将使我们更好地理解x射线爆发中的光发射轮廓。 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。4名美国研究生和1名博士后研究员将参与该项目，该项目由国际科学工程办公室和物理系共同资助。该奖项还支持美国和日本科学家之间下一阶段长期国际合作的规划。