Nuclear Structure Study of Unstable Naclei by Linear Response Function theory with continuum

连续介质线性响应函数理论研究不稳定核的核结构

• 批准号: 12640284
• 负责人: SAGAWA Hiroyuki
• 金额: $ 2.3万
• 依托单位: University of aizu
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640284/
• 关键词: Hartree Fock Theory; RDA Theory; Skin Nuclei; EOS; Unstable Nuclei; Pairing correlation; HF理論; 巨大共鳴; 魔法数; ハロー原子核; Fermi励起; Gamow Teller励起; Skyrme相互作用

We study the following subjects in fiscal year 2003.1)Isospin Dependence of Giant Resonances and Core Polarization effectWe solved the linear response function in the coordinate space taking into account of the continuum effect in skin nuclei ^<20>C and ^<60>Ca in comparison with stable nuclei ^<12>C and ^<40>Ca. We found out the isospin dependence of giant resonances of isoscalar and isovector modes. The core polarization effect on electric quadrupole transitions of C isotopes is also discussed.2)Pairing correlation in RPA linear response theoryWe take into account the pairing correlation in the RPA linear response theory and apply several open shell nuclei. We pointed out the difference between the positive parity and the negative parity collective low-energy excitations in term of the pairing correlation.3)Neutron skin, EOS of asymmetric nuclear matter and symmetry energy coefficientsWe discussed the relation between three quantities ; neutron skin, EOS of asymmetric nuclear matter and symmetry energy coefficients with Skyrme Hartree-Fock theory and relativistic mean field theory. We pointed out quantitatively how to determine the pressure of neutron matter EOS by using the neutron skin size of finite nuclei.

我们在2003.1财政年度研究了以下主题)巨共振同位旋依赖和核心极化效应我们在坐标空间中求解了线性响应函数，考虑了皮肤核^&lt；20&gt；C和^&lt；60&gt；Ca中的连续谱效应，并与稳定核^&lt；12&gt；C和^&lt；40&gt；Ca相比较。我们发现了等标量模和等向量模的巨共振同位旋的依赖关系。讨论了核极化对碳同位素电四极跃迁的影响。2)RPA线性响应理论中的配对关联我们考虑了RPA线性响应理论中的配对关联，并应用了几个开壳核。3)用Skyrme Hartree-Fock理论和相对论平均场理论讨论了中子皮、非对称核物质的状态方程和对称能量系数这三个量之间的关系。我们定量地指出了如何利用有限核的中子皮尺寸来确定中子物质状态方程的压强。

项目成果

I.Hamamoto: "Shape, Shell Structure and low-lying strong octupole strength"Phys.Rev.. C64. 024313-1-024313-6 (2001)

I.Hamamoto：“形状、壳结构和低洼强八极强度”Phys.Rev.. C64。

H.Iwasaki: "Lowlying intrudel state in ^<12>Be and the melting of the N=8 shell closure"Phys.Lett.. B491. 8-14 (2000)

H.Iwasaki：“^<12>Be 中的低位侵入态和 N=8 壳闭合的熔化”Phys.Lett.. B491。

S.Yoshida, H.Sagawa: "Neutron skin thickness and equation of state in asymmetric nuclear matter"Phys.Rev.C. 69(in press). (2000)

S.Yoshida、H.Sakawa：“不对称核物质中的中子皮厚度和状态方程”Phys.Rev.C。

T.Suzuki: "Spin Digole States in ^<208>Bi"Eur.Phys J.A9. A9. 49-53 (2000)

T.Suzuki：“在 ^<208>Bi 中旋转 Digole 态”Eur.Phys J.A9。

H.Sagawa: "New Spin-orbit interactions in skyrme forces"Nucl.Phys.A. A(In Press). (2001)

H.Sakawa：“skyrme 力中的新自旋轨道相互作用”Nucl.Phys.A。