US-Belgium Cooperative Research: Nuclear Astrophysics with Radioactive and Isomeric Beams and Targets

美国-比利时合作研究：放射性和异构束和目标的核天体物理学

• 批准号: 9022907
• 负责人: William Rodney
• 金额: $ 1万
• 依托单位: Georgetown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-04-15 至 1993-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9022907&HistoricalAwards=false
• 关键词: US; Belgium; Cooperative; Research; Nuclear

This award will support continued collaborative research in nuclear astrophysics between US and Belgian physicists. The US group is under the direction of Dr. William Rodney, Georgetown University. The Belgian collaborator is Dr. J. Vervier, Institute for Nuclear Physics, Louvain. The objective of this project is to carry out a program of experiments using radioactive beams to measure cross-sections important to understanding nucleosynthesis. In novae, supernovae, X-ray bursters and possibly in the early universe, the temperature and density were such that the lifetimes of some radioactive (and isomeric) nuclides were comparable to the burning times for their destruction by proton or alpha particle induced nuclear reactions. In these instances, these reactions must be taken into account in developing models for stellar evolution and nucleosynthesis. Thus, the potential for the use of radioactive targets and/or beams is receiving increasing attention in the nuclear physics community. In this project, proposed experiments represent a major step in the direction of providing the needed cross-section information. The Louvain-la-Neuve coupled cyclotron facility will be able to produce the required beam intensity to carry out the experiments. There are no existing US facilities capable of such radioactive beam measurements. The research will benefit from Dr. Rodney's expertise in nuclear astrophysics and the background of his research group in active nuclear experimentation. The results of this research will contribute to our understanding of stellar evolution and nucleosynthesis in stars.

该奖项将支持继续合作研究， 美国和比利时物理学家之间的核天体物理学。 的 美国集团是在威廉罗德尼博士的指导下， 乔治敦大学。比利时的合作者是J. Vervier，核物理研究所，鲁汶。 的 该项目的目标是实施一项计划， 用放射性束测量截面的实验 对理解核合成很重要 在新星、超新星、X射线爆发中， 早期宇宙的温度和密度 某些放射性（和同分异构）核素的寿命 与他们被摧毁的燃烧时间相当， 质子或α粒子引起的核反应。 在 必须考虑到这些情况，这些反应 恒星演化和核合成的模型。 因此，使用放射性靶和/或 束流在核领域受到越来越多的关注 物理社区 在这个项目中， 是朝着提供 所需的横截面信息。 新卢万 耦合回旋加速器设施将能够产生 进行实验所需的光束强度。 那里 美国现有的核设施中， 光束测量 这项研究将受益于博士。 罗德尼在核天体物理学方面的专业知识 他的研究小组正在进行核试验。 的 这项研究的结果将有助于我们了解 恒星演化和恒星核合成的研究。