High-Energy Unstable-Isotope Beams and New Nuclear Sciences

高能不稳定同位素束和新核科学

• 批准号: 04044102
• 负责人: MINAMISONO Tadanori
• 金额: $ 15.17万
• 依托单位: Faculty of Science, Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04044102/
• 关键词: High-energy heavy-ion; Projectile fragmentation process; Spin polarisation; Negative angle scattering; Mirror magnetic moment; Nuclear quadrupole moments; Proton haloe; Electric field gradient in crystal; 鏡映核モーメント; 相互作用断面積; 陽子ハロー

Taking the two unique advantages that are described later, a new On-Line fragment(Isotope)separator was constructed and connected to the Bevalac in LBL,and were utilized for the investigations that are studied with unstable nuclear beams for the first time in the world. One of the biggest character that the projectile fragments created in the high-energy heavy-ion reactions carry is that they are all ejected into forward direction in the collision, i.e., almost parallel to the momenta of the projectile, with the same velocity of the projectile. The other one is that the production rate of any fragments through the process is very high since a very thick target can be used because of the high-energy of the projectiles. To give an enormous power to the separated fragments as probes in various researches, the fragments can be nuclear spin polarized by choosing their ejection angle, even though scattering angles are samll, and by choosing fragment momentum.One of the two main subjects prop … More osed in the present International Scientific Research Program is to ivestigate Non Nucleonic Degrees of Freedom, i.e., meson and quark effects, in nuclei from the detection of nuclear magtnetic moments of mirror nuclei in sdf shells.In this research, the nucleon density of a probe nucleon in nucleus are disclosed important for such investigations that the spacial extension of the valence nucleon are also studied not only through the interaction cross section measurements of the unstable nuclides but also through their static quadrupole moments. In both measurements the well developed b-NMR is utilized effectively. Second one is to investigate nucleon interactions in nucleus and matter distributions of unstable nuclides through the interaction cross section measurements.The scientific outputs in the present collaborative work were very high as shown in the Book of "Sciences Studied by Isotope Beams. "Because of the productivity, the present collaboration will be expanded and extended for another several years. Main facility that will be used in future is the HIMAC in the National Institute of Radiological Sciences, the high-energy heavy-ion accelerater. Less

利用上述两种独特的优势，构建了一种新的在线碎片（同位素）分离器，并将其连接到LBL中的Bevalac上，并在世界上首次用于不稳定核束研究。高能重离子反应中产生的弹丸碎片最大的特点之一是在碰撞过程中全部向前抛射，即几乎与弹丸动量平行，且弹丸速度相同。另一个原因是，由于弹丸的高能量，可以使用非常厚的目标，因此通过该过程产生任何碎片的速度非常高。在各种研究中，为了给分离的碎片作为探针提供巨大的动力，即使碎片的散射角很小，也可以通过选择碎片的弹射角和选择碎片的动量来实现核自旋极化。目前国际科学研究计划的两个主要课题之一是通过检测自旋壳层中镜像核的核磁矩来研究原子核中的非核子自由度，即介子和夸克效应。在本研究中，揭示了探测核子在核中的核子密度对于这类研究的重要性，因此不仅通过不稳定核素的相互作用截面测量，而且通过它们的静态四极矩来研究价核子的空间扩展。在这两种测量中，都有效地利用了发育良好的b-核磁共振。二是通过相互作用截面测量研究核内核子相互作用和不稳定核素的物质分布。从《同位素光束研究的科学》一书中可以看出，这次合作的科学成果非常高。“由于生产力，目前的合作将扩大并延长几年。未来将使用的主要设备是国家放射科学研究所的HIMAC，高能重离子加速器。少

项目成果

K.Matsuta et al.: "Magnetic moment of proton drip-line nucleus ^9C." Proc.Int.Symp.on Phys.of Unstable Nuclei, held at Niigata, Japan, Oct.31-Nov.3,1994. -4 (1994)

K.Matsuta 等人：“质子滴线核的磁矩^9C。”

T.Minamisono et al.,: "Precise Measurement of the Magnetic Moment of ^<17>F(I^π=5/2^+,T_<1/2>=64.5s)and Its Hyperfine Interactions in Ionic Crystals." Hyperfine Interactions. 73. 347-356 (1992)

T. Minamisono 等人：“精确测量 ^<17>F(I^π=5/2^+,T_<1/2>=64.5s) 的磁矩及其在离子晶体中的超精细相互作用。 “超精细相互作用。73。347-356（1992）

T.Ohtsubo et al.: "Precise measurement of the quadrupole moment of β-emitting ^<12>B." Hyperfine Interactions. 88. 25-33 (1994)

T. Ohtsubo 等人：“β 发射 ^12B 的四极矩的精确测量”，88. 25-33 (1994)。

南園忠則、野尻洋一、福田光順 編集: "同位元素ビーム科学-国際協力事業報告書-" 大阪大学理学部, 718 (1994)

南园忠德、野尻阳一、福田光顺编：《同位素束科学-国际合作项目报告-》大阪大学理学院，718（1994）

南園忠則、野尻洋一、赤井久純 福田光順 編集: "The Proceedings of the IXth Hyperfine Interactions" J.C.Baltzers AG, 1500 (1993)

由 Tadanori Minamizono、Yoichi Nojiri、Hisazumi Akai 和 Mitsujun Fukuda 编辑：“第 IX 次超精细交互的论文集”J.C.Baltzers AG，​​1500 (1993)