Neutrons and Interactions of Medium-Energy Particles and Nuclei with Nuclei (Physics)

中子以及中能粒子和原子核与原子核的相互作用（物理学）

• 批准号: 8802392
• 负责人: Richard Madey
• 金额: --
• 依托单位: Kent State University Foundation
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-01 至 1991-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8802392&HistoricalAwards=false
• 关键词: Neutrons; Interactions; Medium; Energy; Particles

This is a proposal by the Medium-Energy Nuclear Physics Group at Kent State University (KSU) to study Gamow-Teller strength, stretched-state excitations, analyzing powers, and polarization-transfer observables in (p,n) reactions supplemented by (n,p) reactions; to probe the nuclear equation-of-state (EOS) by measuring triple-differential cross sections for neutrons from high-multiplicity collisions of equal-mass nuclei as a function of mass number and bombarding energy, where the azimuthal angle of the reaction plane is determined by measuring the transverse velocities of charged fragments emitted in a collision; and to probe nucleon and nuclear structure via electron-induced reactions. KSU is committed to an experiment to determine the electric form factor of the neutron by using the KSU polarimeter to measure the polarization of the recoil neutron after quasielastic scattering of a longitudinally-polarized electron from an unpolarized neutron in deuterium. Also KSU has submitted letters of intent to CEBAF for experiments on the charge form factor of the neutron, the photoproduction and electroproduction of rho mesons, neutron knockout in the quasielastic (e,e'n) coincidence reaction, and two-nucleon knockout (e,e'2N) reactions. The group is continuing to develop improved instrumentation for the detection of neutrons. Current projects include improved neutron polarimeters and higher efficiency neutron detectors.

这是肯特州立大学(KSU)中能核物理小组提出的一项建议，目的是研究(p，n)反应和(n，p)反应中的Gamow-Teller强度、拉伸态激发、功率分析和极化转移观测；通过测量等质量核高重数碰撞中子的三次微分截面来探测核状态方程(EOS)，其中反应平面的方位角是通过测量碰撞中发射的带电碎片的横向速度来确定的；并通过电子诱导反应探测核子和核结构。KSU致力于一项实验，通过使用KSU旋光仪来测量在纵向极化的电子与未极化的中子在氦中的准弹性散射后反冲中子的极化，从而确定中子的电形状因数。此外，KSU还向CEBAF提交了关于中子电荷形状因子、Rho介子的光产生和电产生、准弹性(e，e‘n)符合反应中的中子敲除以及两核子敲除(e，e’2N)反应的实验意向书。该小组正在继续开发用于探测中子的改进仪器。目前的项目包括改进的中子偏振器和更高效率的中子探测器。