Nuclear Force and Nucleon Structure Studies at Intermediate Energies

中能核力和核子结构研究

• 批准号: 9722519
• 负责人: Bryon Anderson
• 金额: $ 60.3万
• 依托单位: Kent State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-01 至 2001-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9722519&HistoricalAwards=false
• 关键词: Nuclear; Force; Nucleon; Structure; Studies

This three-year grant will support the research of three faculty members, two post-doctoral fellows, and three graduate students to perform a variety of experiments in medium-energy nuclear physics. Much of the activity of the group is focused around measurements of the neutron polarization. These experiments include studies of the complete set of spin observables in the reaction of polarized protons with a variety of targets at the neutron polarization facility at the Indiana University Cyclotron Facility. These experiments use specialized detectors developed by Kent State to measure normal and sideways polarizations of the neutron simultaneously. Measurements with 2H 3He, and 4He targets would study the nucleon-nucleon interaction part that is mediated by a single pion or rho meson. Other experiments would study the isovector response of the nuclear continuum and the isovector giant dipole resonance. The determination of the electric form factor of the neutron would be obtained from neutron polarization measurements using polarized electron beams at the MIT-Bates Laboratory and the Thomas Jefferson National Accelerator Facility (TJNAF). Other experiments include a search for three-body forces and a search for pion-field effects. This grant would also support experiments with the Crystal Ball at the Brookhaven National Laboratory AGS and the CLAS detector at Hall B at TJNAF in order to study neutral baryon resonances and nucleon resonances, respectively.

这笔为期三年的拨款将支持三名教员、两名博士后研究员和三名研究生进行各种中能核物理实验的研究。该小组的大部分活动都集中在测量中子极化上。这些实验包括在印第安纳大学回旋加速器设施的中子极化设施中对极化质子与各种目标反应中的一整套自旋观测数据的研究。这些实验使用肯特州立大学开发的专门探测器来同时测量中子的正常极化和横向极化。用2H、3He和4He靶的测量将研究核子-核子相互作用部分，这部分是由单个介子或Rho介子介导的。其他实验将研究核连续体的向量响应和向量巨偶极子共振。将通过在麻省理工学院贝茨实验室和托马斯·杰斐逊国家加速器设施(TJNAF)使用极化电子束进行中子极化测量来确定中子的电形状因数。其他实验包括搜索三体力和搜索π介子场效应。这笔赠款还将支持布鲁克海文国家实验室AGS的水晶球和TJNAF B厅的Clas探测器的实验，以便分别研究中性重子共振和核子共振。