Studies on the damping mechanism of highly excited states in Nuclei

原子核高激发态阻尼机制的研究

• 批准号: 61540214
• 负责人: MATOBA Masaru
• 金额: $ 0.83万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61540214/
• 关键词: Highly Excited States in Nuclei; Damping of Highly Excited States; High Resolution Spectrograph; Focal Plane Detector; Micro computer Based Data Accuisition and Analysis System; 原子核反応

This project is a support of the experimental system for the study of the Kyushu University Group at joint research center, i.e., Research Center of Nuclear Physics, Osaka University (RCNP) on the damping mechanism of highly excited states in nuclei.The experiments are performed with a high resolution spectrograph RAIDEN. The focal plane detector system of this spectrograph used in this group is constructed by Kyushu University Group. In 1986, the data accuisition system and data analysis system are upgraded with multi microcomputer system, and the length of the focal plane detector is lengthen from 1.5 m to 1.8 m.With these efforts, the power of the data accuisition and analysis is largely improved. After this system grade-up is completed, the data analysis of old data are analyzed firstly and published. A paper for the data accuisition system is also published.In 1987, a new project of the study on the nuclear damping mechanism started. This is the detailed investigation of the single hole states in ^<40,42,44,48>Ca with (p^^<->>,d) reactions at 65 Mev. Two times of machine-time have been performed and quite good data of ^<40,44,48>Ca(p^^<->>,d)^<39,43,47>Ca reactions to the excitation energy region 0 - 20 MeV are obtained. The data are analyzed with view points of the fragmentation and damping phenomena in a single hole state. Already, a part of the data are analyzed and the submittion of paper has started. With this project, the understanding on the nuclear damping mechanism of the deeply bound hole states has been greatly developed.

本项目是九州大学联合研究中心，即大阪大学核物理研究中心(RCNP)关于原子核中高激发态的衰减机制研究的实验系统的支持。本组所用光谱仪的焦平面探测系统由九州大学集团建造。1986年，对数据采集系统和数据分析系统进行了多机升级，将焦平面探测器的长度从1.5m延长到1.8m，大大提高了数据采集和分析的能力。在该系统升级完成后，首先对旧数据进行数据分析并发布。1987年，又启动了一个新的研究核阻尼机制的项目。本文详细研究了在65 MeV下^&lt；40，42，44，48&gt；Ca与(p^&lt；-&gt；，d)反应中的单空穴态。进行了两次机器时间计算，得到了激发能区为0-20 MeV的^&lt；40，44，48&gt；Ca(p^^&lt；-&gt；，d)^&lt；39，43，47&gt；Ca反应的较好数据。从单空穴状态下的碎裂和衰减现象的角度对数据进行了分析。已经对部分数据进行了分析，并开始提交论文。通过这一项目，人们对深束缚空穴态的核阻尼机制的理解有了很大的发展。

项目成果

大垣英明: Physical Review C. (1988)

大垣秀明：《物理评论 C.》(1988)

的場優: Nuclear Physics. A456. 235-252 (1986)

场胜：核物理学。235-252（1986）。

大垣英明: IEEE Transactions on Nuclear Sciences. 34-1. 110-114 (1987)

大垣秀明：IEEE 核科学汇刊 34-1（1987）。