Research of Atomic Nuclei by Electrons and Gamma-rays

在1986年至1988年的文部省国际科学研究计划期间，东北大学和墨尔本大学之间交换了总共20多名核物理学家，合作研究电子和伽马射线的原子核。在过去三年中进行的合作实验有：用标记偏振光子进行的^9 Be，^<10>B（，p），（，pp），（，pn），^9 Be（，n），^<12>C（，p），^<40>Ca（，n），^&lt;6，7&gt;Li（，p）和^4 He（，n）。日本和澳大利亚学生共获得4个PnD。东北大学理学院与墨尔本大学之间的文化协议于1988年签署。1989年2月，在东北大学举办了使用连续电子束的光核反应研讨会。讲习班总结了合作的结果。合作发现的主要问题有：1.在（，p）和（，n）谱的高能缺失部分发现了s态的准氘核过程.（，p_0）反应中直接单核子过程的主导地位。预计利用东北大学核科学实验室的未来设施进一步扩大合作。

Within the period of Monbusho International Scientific Research Program extending from 1986 to 1988, the total of more than 20 nuclear physicists were exchanged between Tohoku and Melbourne Universities for the cooperative research of atomic nuclei by electrons and gamma-rays. The cooperative experiments performed in the last 3 years are ^9Be, ^<10>B( ,p), ( , pp), ( ,pn), ^9Be( ,n), ^<12>C( ,p) by tagged polarized photons, ^<40>Ca( ,n), ^<6,7>Li( ,p) and ^4He( ,n). The total of 4 PnDs were given to Japanese and Aus-tralian students for these experiments. The Cultural Agreement between the Faculties of Science of Tohoku University and the University of Melbourne was signed in 1988. In February 1989, the Workshop on Phtonuclear reactions using Continuous Electron Beam was held at Tohoku University. The results of the collaboration were summarized in the Workshop. The main topics which have been discovered by the collaboration are,1. The discovery of the s-state quasi-deuteron process in the high missing energy parts of ( ,p) and ( ,n) spectra.2. The dominance of the direct one-nucleon process in ( ,p_0) reaction.The further extension of the collaboration using the future facilities of the Laboratory of Nuclear Science of Tohoku University are expected.