Giant Resonance States in Nuclei

原子核中的巨共振态

• 批准号: 09640343
• 负责人: SUZUKI Toshio
• 金额: $ 1.28万
• 依托单位: Fukui University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640343/
• 关键词: Giant resonance; Double giant resonance; Mie plasmon; Sum rules; Gamow-Teller resonance; Relativistic models; 原子核の巨大共鳴状態; ガモフ・テラー巨大共鳴; 中間子交換流; 2重巨大共鳴; ランダウ・ミグダルパラメータ; 巨大共鳴; ミ-・プラズモン

1.Model-independent sum rules for double giant resonance states have been derived, which correspond to the Thomas-Reich-Kuhn sum rule for single giant dipole resonance states.2.It has been shown theoretically that the width of the Mie plasmon in atomic clusters is not inversely proportional to the cluster size, but to the square root of the size. This result should be examined in detail experimentally.3.The values of the spin-dependent Landau-Migdal parameters have been determined from the recently observed Gamow-Teller strength. The obtained values are much smaller than those expected previously. As a result, the critical density of the pion condensation in nuclear matter is about two times of the normal nuclear density.4.It has been shown analitically that the anti-nucleon degrees of freedom are necessary for describing the nuclear giant monopole states in relativistic models.

1.导出了双巨共振态的模型无关求和规则，它对应于单巨偶极共振态的Mie-Reich-Kuhn求和规则. 2.从理论上证明了原子团簇中Mie等离子体激元的宽度不是与团簇尺寸成反比，而是与团簇尺寸的平方根成反比.这一结果应在实验上进行详细的检验。3.自旋相关的朗道-米格达尔参数的值已由最近观察到的Gamow-Teller强度确定。得到的值比以前预期的要小得多。结果表明，核物质中π介子凝聚的临界密度约为正常核密度的2倍。4.分析表明，在相对论模型中，反核子自由度是描述核巨介子态的必要条件。

项目成果

H.Kurasawa: "The continuity equation of RPA"Progress of Theoretical Physics. 99. 145-150 (1998)

H.Kurasawa：“RPA的连续性方程”理论物理进展。

T.Suzuki: "E1 x E1 and E1x E2 giant resonances"RIKEN Review. 23. 119-122 (1999)

T.Suzuki：“E1 x E1 和 E1x E2 巨型共振”RIKEN 评论。

T.Suzuki: "Landau-Migdal parameters and pion condensation"Proc.RCNP.Int.Symp.on Nuclear responses and medium effects (Universal Academy Press,Inc.Tokyo). 77-85 (2000)

T.Suzuki：“Landau-Migdal 参数和π介子凝聚”Proc.RCNP.Int.Symp.on 核反应和介质效应（环球学院出版社，Inc.东京）。

H.Kurasawa: "Double giant resonance states"AIP Conference Proc.425 for Tours Symp.on Nuclear physics III (Tours, France). 315-323 (1997)

H.Kurasawa：“双巨共振态”AIP 会议 Proc.425 为图尔 Symp.on 核物理 III（图尔，法国）。

H.Kurasawa: "Double giant resonance states"Proc.RIKEN Symp.on Giant resonances(RIKEN Wako). 157-163 (1997)

H.Kurasawa：“双巨共振状态”Proc.RIKEN Symp.on Giant 共振（RIKEN Wako）。