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Production of and Physics with High-Intensity Radioactive Nuclear Beam

高强度放射性核束的产生和物理

基本信息

批准号：
02044033
负责人：
NOMURA Toru
金额：
$ 5.44万
依托单位：
Institute for Nuclear Study, University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02044033/
关键词：
Radioactive nuclear beams Lsotope Separator on-line ISOL ion sources High-mass resolving power ISOL Split-coaxial RFQ Laser nuclear spectroscopy Nuclear astrophysics Heavy-element synthesis in the universe 大卒率ISOLイオン源超高質量分解能ISOL 天体核物理

项目摘要

The main purpose of the present study is to develop various techniques to realize accelerated radioactive nuclear beams (RNB) that are presently expected worldwide to open new fields of nuclear physics and related sciences. To carry out some pioneering experiments by use of the unstable nuclear beams to show their powerfulness as a new experimental tool is another aim of this work.The following objects were set up in the beginning of the present study and were successfully carried out in collaboration with researchers of several universities and institutions in Europe, Canada and U. S. A. such as CERN (The Switzerland), TRIUMF (Canada) and University of Giessen (Germany). The results have been presented in several international conferences on nuclear physics held in 1992-93 and have also been published in international scientific journals.A. Research and development of highly efficient ion sources for an isotope separator on-line (ISOL)--- ISOL ion sources such as those of surface-ioni … More zation, plasma and ECR types suited for the use of thick targets have been developed in collaboration with INS, CERN and TRIUMF. High ionization efficiencies up to several tens of % were achieved for some elements.B. Detailed design of the high-mass resolving-power ISOL optics--- The ISOL consisting of both magnetic and electrostatic stages have been designed and shown to realize a mass resolving power over 20, 000 by the MonteCarlo simulations. This has been done in collaboration with INS, Tohoku and Giessen Unversites.C. Accelration of radioactive nuclear beams--- A special type of heavy-ion linac, called a split-coaxial RFQ, has been studied in INS and GSI (germany). A prototype accelerator of this type has been constructed at INS, which could successfully accelerate low-speed heavy ions with extremely small charge-to-mass ratios. It has enabled efficient acceleration of radioactive nuclear beams.D. Pioneering experiments on nuclear and nuclear astrophysics with RNB--- The spin polarization of unstable nuclei implanted into solids has successfully been achieved, in collaboration with Kyoto University and CERN, etc., by optical pumping. Nuclear astrophysical experiments to study heavy-element synthesis in the universe were also carried out in RIKEN, INS and are in progress at GANIL (France). Less

本研究的主要目的是开发各种技术，以实现加速放射性核束（RNB），目前预计在世界范围内打开核物理和相关科学的新领域。本研究的另一个目的是利用不稳定核束进行一些开创性的实验，以展示其作为一种新的实验工具的强大功能。S. A.如CERN（瑞士）、TRIUMF（加拿大）和吉森大学（德国）。研究结果已在1992- 1993年举行的几次国际核物理会议上提出，并在国际科学杂志上发表。在线同位素分离器（ISOL）用高效离子源的研究与开发-- ISOL离子源，如表面离子源， ...更多信息与INS、CERN和TRIUMF合作开发了适用于厚靶的等离子体和ECR类型。某些元素的电离效率高达几十%.高质量分辨力ISOL光学系统的详细设计-设计了由磁载台和静电载台组成的ISOL光学系统，并通过蒙特卡洛模拟，实现了超过20000的质量分辨力。这是与INS、东北大学和吉森大学合作完成的。放射性核束流加速-一种特殊类型的重离子直线加速器，称为分裂同轴加速器，已在INS和GSI（德国）进行了研究。这种类型的原型加速器已经在INS建成，它可以成功地加速低速重离子与极小的电荷质量比。它使放射性核束能够有效地加速。利用RNB进行核与核天体物理的开创性实验-与京都大学和CERN等合作，成功实现了注入固体的不稳定核的自旋极化，通过光泵浦。研究宇宙中重元素合成的核天体物理学实验也在研究所进行，GANIL（法国）正在进行。少