Few Nucleon System Study by Hign Energy Electron Scattering.

高能电子散射的核子系统研究很少。

• 批准号: 06044090
• 负责人: HOTTA Akio
• 金额: $ 1.98万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06044090/
• 关键词: High energy electron scattering; High Momentum transfer; Few body system; Mesom exchange currents; Relativistic effects; Short range N-N interactions; Quarks and gluon with QCD; Nucleon resonance excitations

Electron scattering from few body nuclei plays an important role in studying nuclear dynamics and structure since their wave functions are well understood. Increasing momentum transfers by high energy electron, the effects of mesom exchange currents (MEC) and DELTA-isobar, relativistic effects, quark-gluon degrees-of-freedom, have to be taken into account. We proposed the elastic magnetic measurements of ^3He (e, e') and the d (e, e'p) coincidence measurements at MIT-Bates Laboratory (1 GeV Electron facility) as International Science Research Program.1. ^3He (e, e') project : The goal of this experiment is to measure the magnetic from factor of ^3He in the momentum transfer range Q^2=31^-54fm^<-2>. Since the cross sections as small as 10^<-40>cm^2/sr are anticipated, a good background rejection and a thick target are required. The system of a circulating gas ^3He target at 50 atom and 22 K was constructed at UMass and has been tested successfully in 1994. Special electronics for low ba … More ckground has been accommodated. The commissioning run was performed in 1994, the experiment will be performed in late 1995.2. d (e, e'p) project : The objective of this experiment is to investigate contributions of relativistic effects and meson exchange currents in the deuteron by means of a measurement of the d (e, e'p) coincidence cross sections (sigma_L+sigma_T, andsigma_<LT>)at low excitation energy (3 (E_<np>(12 MeV) and high momentum transfer (7.5 (q_<mu>^2(10 fm^<-2>). The liquid deuterium target cell was completed in Japan, the test with Basel Loop cooling system was done at MIT Bates successfully. The experiment using OOPS and OHIPS will be performed in late 1995.3. Prof.Ross Hicks of UMass was invited to Japan (1995.1.15-1995.2.3.)(1) Projects at MIT : We discussed about the ^3He (e, e') and d (e, e'p) at Shizuoka U.and Tohoku U.Concern ^<10>B electron scattering results, the discussion was took place at Osaka U.with Dr.T.Sato and Prof.Ohtsubo.(2) The future projects at CEBAF,U.S.A.(4 GeV Continuous electron facility) : Seminars were took place about the Physics programs (UMass and Shizuoka U.) at Tokyo Univ. (INS), Tohoku Univ.Osaka Univ.RCNP Osaka Univ.and Shizuoka Univ. These talks were quite successful and gave a strong impact to Japanese nuclear physicist in excellent physics subjects with high energy continous electron. Less

来自少数体核的电子散射在研究核动力学和结构中发挥着重要作用，因为它们的波函数已被很好地理解。必须考虑高能电子增加的动量转移、介观交换流 (MEC) 和 DELTA 等压线的影响、相对论效应、夸克胶子自由度。我们在 MIT-Bates 实验室（1 GeV 电子设施）提出了 ^3He (e, e') 的弹性磁测量和 d (e, e'p) 符合测量作为国际科学研究计划。1。 ^3He (e, e') 项目：该实验的目标是测量动量传递范围 Q^2=31^-54fm^<-2> 中 ^3He 因子的磁性。由于预计横截面小至10^-40cm^2/sr，因此需要良好的背景抑制和厚的目标。 50 原子和 22 K 的循环气体 ^3He 靶系统是在麻省大学建造的，并于 1994 年成功进行了测试。配备了用于低背景的特殊电子设备。调试运行于1994年进行，实验将于1995.2年底进行。 d (e, e'p) 项目：本实验的目的是通过测量低激发能 (3 (E_<np>(12 MeV)) 和高动量转移 (7.5 (q_<mu>^2(10 fm^<-2>)。液态氘靶室在日本完成，Basel Loop冷却系统的测试在MIT Bates成功完成。使用OOPS和OHIPS的实验将于1995.3年底进行。麻省大学Ross Hicks教授应邀访问日本(1995.1.15-1995.2.3。)(1) MIT项目: 我们讨论了 ^3He (e, e') 和 d (e, e'p) 在静冈大学和东北大学关注 ^<10>B 电子散射结果，在大阪大学与 T.Sato 博士和 Ohtsubo 教授进行了讨论。(2) 美国 CEBAF（4 GeV 连续电子设施）的未来项目：举办了有关物理项目的研讨会（麻省大学和静冈大学） U.）在东京大学。 (INS)、东北大学、大阪大学、RCNP 大阪大学和静冈大学。这些报告非常成功，对日本核物理学家在高能连续电子的优秀物理课题上产生了强烈的影响。少

项目成果

A.Cichocki, J.Dubach, R.S.Hicks, G.A.Peterson et al.: "Electron scattering from ^<10>B" Phys.Rev.C. (to be published). 26 (1995)

A.Cichocki、J.Dubach、R.S.Hicks、G.A.Peterson 等人：“^<10>B 的电子散射”Phys.Rev.C。

G.Adams,T.Tamae 他: "Separation of the Transverse and Longitudinal Cross Sections in the Reaction ^3He(e,e'd)p" 1994 Gordon Photonuclear Conference Research Summaries. 431-435 (1994)

G.Adams、T.Tamae 等人：“反应 ^3He(e,ed)p 中横向和纵向截面的分离”1994 年戈登光子核会议研究摘要 431-435 (1994)。

A.Hotta,T.Tamae 他: "Coincidence out-of-plane Measurement of the D(e,e'p)" 1994 Gordon Photonuclear Conference Research Summaries. 207-207 (1994)

A.Hotta、T.Tamae 等人：“D(e,ep) 的重合面外测量”1994 年戈登光子核会议研究摘要 207-207 (1994)。

A.Hotta, T.Tamae et al.: "Coincidence out-of plane Measurement of the D (e, e'p)" 1994 Gordon Photonuclear Conference Research Summaries. 207-207 (1994)

A.Hotta、T.Tamae 等人：“D (e, ep) 的巧合平面外测量”1994 年戈登光子核会议研究摘要。