Quark Nuclear Physics at Multi-GeV Accelerator

一个名为“春八计划”的项目正在进行中，目的是利用康普顿背向散射的高能伽马射线，在春八设施发展核物理。这个项目现在已经朝着成功的目标有了一个良好的开端。1997年11月，与几位来自国外的知名科学家举行了一次国际用户小组会议，其中包括印第安纳大学的约翰·卡梅隆教授。我们讨论了如何组织合作团队在春八建设实验设施。1998年秋天，BL33B2梁线的部分建设将完成。我们参观了几个主要的机构，这些机构用真正的光子研究核物理。我们发现春八夸克核物理引起了世界上许多科学家的浓厚兴趣。为了研究原子核中的M1激发，印第安纳大学回旋加速器实验室进行了非弹性质子散射实验。实验很成功，数据现在正在分析中。本提出了另一项研究(p，p‘)反应的实验，并在计划咨询委员会中得到了批准。太阳中微子问题是当前与中微子振荡有关的一个课题。原子核176和Yb和160和Gd对太阳中微子的在线探测非常有用。我们用“Grand Raiden”能谱仪研究了450 MeV下的^&lt；176&gt；Yb和^&lt；160&gt；Gd(^3He，t)反应。电荷交换反应，如(^3He，t)反应，为天体物理和粒子物理提供了宝贵的信息。研究原子核中的自旋激发是很重要的。这些研究是通过非弹性质子散射和核荧光实验进行的。后者将在2018年春季开始实施。

A Project called "SPring-8 Project" is in progress in order to develop Nuclear Physics at the SPring-8 facility using the back Compton scattered high-energy gamma rays. This project has now a good start toward its successful goal. In November 1997, a international users-group meeting was held with several distingushed scientists from abroad including Professor John Cameron of Indiana University. We discussed how to organize the cooperative teams to construct the experimental facilities in SPring-8. In the fall of 1998, a part of the construction of the BL33B2 beam line will be finished. We visited several major institites which investigate nuclear physics with real photons. We found that the quark nuclear physics at SPring-8 gets strong interest from many scientists in the world.An inelastic proton scattering experiment was performed at the cyclotron laboratory of Indiana University to study the M1 excitations in nuclei. The experiment was suceesful and the data is now in analysis. Another experiment to studiy the (p, p') reaction has benn proposed and it was approved in the Program Advisary Commettee.The solar neutrino problem is a current topics relating to the neutrino oscillation. Neuclei ^<176>Yb and ^<160>Gd were found to be very usefull for the on-line detection of the solar neutrinos. We studied the ^<176>Yb and ^<160>Gd(^3He, t) reactions at 450 MeV using the spectrometer "Grand Raiden". The charge-exchange reactions such as (^3He, t) reactions give precious informantion on astrophysics as well as on particle physics. Studies of spin excitations in nuclei is important. These studies are made via inelastic proton scattering and nuclear fluorecence experiments. The latter will be feasible in SPring-8.