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.

该奖项将支持美国与比利时物理学家之间在核天体物理学方面的持续合作研究。 美国小组在乔治敦大学的威廉·罗德尼博士的指导下。比利时的合作者是卢旺核物理研究所J. Vervier博士。 该项目的目的是使用放射光束进行实验程序，以测量对理解核合成重要的横截面。 在Novae，Supernovae，X射线助力器以及可能在早期的宇宙中，温度和密度使得某些放射性（和异端）核素的寿命与质子或α颗粒颗粒诱导的核反应破坏的燃烧时间相当。 在这些情况下，必须在开发出恒星进化和核合成模型中考虑这些反应。 因此，使用放射性靶标和/或光束的潜力在核物理界受到越来越多的关注。 在该项目中，提出的实验代表了提供所需的横截面信息方向的重要一步。 Louvain-la-neuve耦合的回旋器设施将能够产生所需的光束强度以进行实验。 没有现有的US设施能够进行此类放射性光束测量。 这项研究将受益于罗德尼博士在核天体物理学方面的专业知识及其主动核试验研究小组的背景。 这项研究的结果将有助于我们对恒星中恒星进化和核合成的理解。