Study of nuclei with strangeness
奇异核的研究
基本信息
- 批准号:08239103
- 负责人:
- 金额:$ 20.93万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research on Priority Areas
- 财政年份:1996
- 资助国家:日本
- 起止时间:1996 至 1999
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The purpose of this research project is to discover the world of nuclei with strangeness and solve the various current problems in the strangeness nuclear physics. We have developed new experimental techniques and devices in order to perform high precision experiments on nuclei with s=-1 and to discover nuclei with s=-2. We have also organized a systematic theoretical study on strangeness nuclear physics along with the experimental programs. We have constructed a Ge-ball detector (Hyperball) for the γ-spectroscopy of hypernuclei. The M1 and E2 γ transitions ィイD17ィエD1LiィイD2ΛィエD2 and ィイD19ィエD1BeィイD2ΛィエD2 were clearly observed for the first time with Ge detectors. The spin-dependent fine-structures of hypernuclei were extensively studied with these new data. The lifetimes and decay branching ratios were also extensively measured for heavier hypernuclei which revealed new aspects of the ΛN weak interaction. It has been extensively studied with OBE and "quark" - model. The nuclei with s=-2 have been searched for with various methods such as a new hybrid-emulsion detector and a cylindrical π spectrometer (CDS) which were constructed in this research project. The experiments with these detectors were successfully carried out at KEK and BNL. The discovery of new s=-2 nuclei are quite probable. The evidence of Ξ-nuclei was already obtained. The hyperon-nucleon interaction has been studied both in quark models and OBE models. The Σ-p scattering experiments were also performed and provided new cross section data which should improve our understanding on hypernuclei.We have hosted 5 international and 8 domestic conferences to promote and organize the research on strangeness nuclear physics. More than 100 papers have been published in this research project.
这项研究项目的目的是发现奇异核的世界,解决当前奇异核物理中的各种问题。为了对S=-1原子核进行高精度实验,发现S=-2原子核,我们发展了新的实验技术和装置。我们还组织了系统的奇异性核物理理论研究和实验计划。我们已经构建了一个用于超核γ光谱的Ge球探测器(Hyperball)。首次用Ge探测器清楚地观察到了M1和E2γ转变ィイD17ィエD1LiィイD2ΛィエD2和ィイD19ィエD1BeィイD2ΛィエD2。利用这些新数据,我们广泛地研究了超核的自旋相关精细结构。重超核的寿命和衰变分支比也被广泛测量,这揭示了Λ-N弱相互作用的新方面。人们已经用OBE和夸克模型对它进行了广泛的研究。用本研究项目中建立的新型混合乳胶探测器和圆柱形π光谱仪等多种方法寻找了S=-2的原子核。用这些探测器在KEK和BNL成功地进行了实验。新的S=-2核的发现是很有可能的。已经获得了Ξ核的证据。超子-核子相互作用已经在夸克模型和OBE模型中得到了研究。我们还进行了Σ-p散射实验,并提供了新的截面数据,这将提高我们对超核的理解。我们已经主办了5次国际会议和8次国内会议,以促进和组织奇异性核物理的研究。在这个研究项目中发表了100多篇论文。
项目成果
期刊论文数量(68)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
H. Nabetani et al.: "Spin observables in the pn-> pΛ reaction"Phys. Rev.. C60. 017001 (1999)
H. Nabetani 等人:“pn-> pΛ 反应中的自旋观测值”Phys. Rev. 017001 (1999)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
K. Yamamoto et al.: "Search for double-Λ hypernuclei and the H-dibaryon in the (Κ^-, Κ^+) reaction on ^<12>C"Phys Lett.. (to be published).
K. Yamamoto 等人:“Search for double-Λ hypernuclei and the H-dibaryon in the (Κ^-, Κ^+)reaction on ^<12>C”Phys Lett..(即将出版)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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- 通讯作者:
P. Khhaustov et al.: "Search for double-Λ hypernuclei formation via (Ξ^-, ^<12>C)_<atom> →^<12>_<ΛΛ> B + n"Phys. Rev.. C61. 027601 (2000)
P. Khhaustov 等人:“通过 (Ξ^-, ^<12>C)_<atom> →^<12>_<ΛΛ> B + n 搜索双Λ超核形成”Phys. C61 .027601 (2000)
- DOI:
- 发表时间:
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- 影响因子:0
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- 通讯作者:
T. Kishimoto: "Kaonic nuclei excited by the (K^- ,N)reaction"Phys. Rev. Lett.. 83. 4701 (1999)
T. Kishimoto:“由 (K^-,N) 反应激发的 Kaonic 核”Phys。
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- 影响因子:0
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- 通讯作者:
H. Tamura et al.: "High-resolution hypernuclear gamma-ray spectroscopy"Nucl. Phys. A. (in press).
H. Tamura 等人:“高分辨率超核伽马射线光谱”Nucl。
- DOI:
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- 影响因子:0
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22790437 - 财政年份:2010
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19790345 - 财政年份:2007
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Grant-in-Aid for Young Scientists (B)
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12304013 - 财政年份:2000
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Grant-in-Aid for Scientific Research (A)
High resolution γ spectroscopy of hypernuclei with large Ge detector system
使用大型 Ge 探测器系统进行超核高分辨率 γ 能谱
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08239102 - 财政年份:1996
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$ 20.93万 - 项目类别:
Grant-in-Aid for Scientific Research on Priority Areas
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05044052 - 财政年份:1993
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$ 20.93万 - 项目类别:
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