RUI: United States-Russia Investigation of the Neutron-Neutron Scattering Length

RUI：美国和俄罗斯对中子-中子散射长度的调查

• 批准号: 0555652
• 负责人: Sharon Stephenson
• 金额: $ 15万
• 依托单位: Gettysburg College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-10-01 至 2010-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0555652&HistoricalAwards=false
• 关键词: RUI; United; States; Russia; Investigation

For more than forty years nuclear physicists have proposed experiments at various facilities to measure the strength of attraction between two neutrons. This strength of attraction would be measured by directly colliding neutrons and yet no successful measurements have been done. The two primary obstacles have been a not having an intense enough source of neutrons and not having a sufficiently detailed knowledge of the neutron source characteristics and other experimental parameters. With support from the NSF, an international collaboration is constructing an experimental apparatus at the All Technical Institute in Snezhinsk, Russia to perform the first ever direct neutron-neutron scattering experiment. The YAGUAR reactor in Snezhinsk has the requisite neutron intensity, and computer modeling of the experimental apparatus has helped with the design of the apparatus and will allow us to extract the quantities of interest from the data. Gettysburg College has a history of incorporating student participation in physics research, and is teaching undergraduates some of the computational techniques necessary for this hallmark experiment.

40多年来，核物理学家一直在各种设施上提出实验来测量两个中子之间的引力强度。 这种吸引力的强度可以通过直接碰撞中子来测量，但还没有成功的测量。 两个主要的障碍是没有足够强的中子源和没有足够详细的中子源特性和其他实验参数的知识。 在国家科学基金会的支持下，一个国际合作项目正在俄罗斯斯内辛斯克的全技术研究所建造一个实验装置，以进行有史以来第一次直接中子-中子散射实验。 斯内辛斯克的YAGUAR反应堆具有必要的中子强度，实验装置的计算机建模有助于装置的设计，并将使我们能够从数据中提取感兴趣的量。 葛底斯堡学院有着将学生参与物理研究的历史，并正在向本科生教授这项标志性实验所需的一些计算技术。