US-France Cooperative Research: Properties of Hot Nuclei

美法合作研究：热核的性质

• 批准号: 8914419
• 负责人: Joseph Natowitz
• 金额: $ 1.89万
• 依托单位: Texas A&M University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-02-01 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8914419&HistoricalAwards=false
• 关键词: US; France; Cooperative; Research; Properties

This award will support contiued collaborative research among the following researchers: Dr. J.B. Natowitz, Cyclotron Institute, Texas A&M University, Drs. Albert Demeyer and Daniel Drain, Institute of Nuclear Physics, Lyon and Dr. Alain Giorni, Institute of Nuclear Sciences, Grenoble, France. The objective of the research is the study of nuclear properties at high excitation energy. The experimental program to be pursued will focus on measurements of the properties of nuclei having hundreds of MeV of excitation energy produced in heavy ion induced reactions. Among the properties to be determined are the heat capacities, limiting temperatures and modes of de-excitation or disassembly. Studies of hot nuclei near the limits of self-bound nuclear systems allows stringent tests of theoretical models of the nucleus and provide new information on nuclear dynamics and the nuclear equation of state at elevated temperature. The AMPHORA detector array at Grenoble and new detection equipment available at Texas A&M will be the primary research tools employed in this work. The project will benefit from the significant expertise of Dr. Natowitz on this topic, as well as the sharing of U.S. and French accelerators and equipment. The latter will greatly help in obtaining the necessary beam time, and in full construction of an optimal experimental set up.8914710 Beck This award will support collaborative research between Dr. Jean Galtier and Dr. Brigitte Meyer-Berthaud, Universite des Sciences et Techniques du Languedoc, Montpellier, France, and Dr. Charles Beck, University of Michigan, Ann Arber and Dr. William Stein, State University of New York-Binghamton, centering the origin and early evolution of seed plants. These two research groups have access to especially large and important collections of some of the earliest known seed plants, members of the extinct Lower Carboniferous seed fern family, Calamopityaceae, from the New Albany Shale of the United States, and the Lydiennes Formation of the Montagne Noire of France. In the recent years, it has become increasingly clear that input from fossil early seed plants is essential for correctly inferring seed plant phylogeny. However, to be successful more comprehensive geological and geographic perspectives on calamopityacean and other early seed plant remains must be developed. This award will provide travel support to allow the investigators to integrate their research efforts in several areas including: i) detailed systematic analysis of very similar material described independently by the two groups, ii) a concerted effort to improve the methods by which information on these forms is collected, including development of morphometric analytical techniques for assessing homology in the primary vascular system, iii) development of plans for a comprehensive database on early seed plant remains suitable for a wide range of research problems, and iv) a phylogenetic analysis of seed plant origins concentrating on the fossil evidence of this group's early members.

该奖项将支持持续的合作研究， 以下研究人员：J.B.博士纳托维茨，回旋加速器研究所， 德克萨斯农工大学，阿尔伯特·德迈尔和丹尼尔·德伦博士，& 里昂核物理研究所和研究所Alain Giorni博士 法国格勒诺布尔核科学研究所 的目的 研究是在高激发下的核性质的研究 能源 将要进行的实验计划将侧重于测量 具有数百MeV激发的原子核 重离子反应产生的能量。 中 要确定的属性是热容量，限制 温度和灭磁或拆卸模式。 研究 在自约束核系统的极限附近， 核理论模型的严格测试，并提供 关于核动力学和核动力学方程的新信息 在升高的温度下。 AMPHORA探测器阵列在 格勒诺布尔和新的探测设备可在得克萨斯州A M将& 是这项工作中使用的主要研究工具。 项目 将受益于纳托维茨博士的重要专业知识， 这个话题，以及美国和法国加速器的分享 与设备. 后者将大大有助于获得 必要的梁时间，并在充分建设一个最佳的 实验装置8914710 贝克 该奖项将支持Jean博士与 Galtier和Brigitte Meyer-Berthaud博士，科学大学 法国蒙彼利埃，和查尔斯博士 贝克，密歇根大学，安阿伯和威廉斯坦博士， 纽约州立大学宾汉姆顿分校，以起源和 种子植物的早期进化 这两个研究小组 访问一些特别重要的大型收藏品， 已知的最早的种子植物，已灭绝的低 石炭纪种子蕨类植物科，Calamopityaceae，来自新西兰 美国的奥尔巴尼页岩，以及 法国的黑山 近年来，越来越明显的是， 早期种子植物的化石是正确推断 种子植物生殖 但是，要想成功， 对灾难动物的地质和地理观点， 必须开发其他早期种子植物遗骸。 这个奖项将 提供旅行支助，使调查员能够融入 他们的研究工作在几个领域，包括：i）详细 对独立描述的非常相似的材料进行系统分析 （二）共同努力改进方法 收集这些表格上的信息的方式，包括 发展形态测定分析技术， 原生血管系统的同源性，iii）制定计划 建立一个关于早期种子植物的综合数据库仍然是合适的 一个广泛的研究问题，和四）系统发育 以化石为中心的种子植物起源分析 这群人早期成员的证据