2001年 第18卷 第4期
2001, 18(4): 201-205.
doi: 10.11804/NuclPhysRev.18.04.201
摘要:
基于表述经典及量子系统可积性的动力对称性群,对量子可积系统规则运动的经典对应问题运用归纳法进行了研究.具体给出了经典近似描述的适用条件,并进行了简明讨论.Based on the dynamical symmetry group characterizing the integrability of classical as well as quantum mechanics, quantum dynamics with proper initial conditions was genuinely formulated, and analytical solutions in the form of soliton-like state evolving around a certain invariant torus were obtained. It has been shown that, in case the intrinsic size of the evolving quantum state is significantly smaller than the extent of its evolving orbit, the motion can be satisfactorily treated with...
基于表述经典及量子系统可积性的动力对称性群,对量子可积系统规则运动的经典对应问题运用归纳法进行了研究.具体给出了经典近似描述的适用条件,并进行了简明讨论.Based on the dynamical symmetry group characterizing the integrability of classical as well as quantum mechanics, quantum dynamics with proper initial conditions was genuinely formulated, and analytical solutions in the form of soliton-like state evolving around a certain invariant torus were obtained. It has been shown that, in case the intrinsic size of the evolving quantum state is significantly smaller than the extent of its evolving orbit, the motion can be satisfactorily treated with...
2001, 18(4): 206-214.
doi: 10.11804/NuclPhysRev.18.04.206
摘要:
基于兰州重离子加速器国家实验室 (HIRFL )的中能放射性核束线 (RIBLL)及北京串列加速器国家实验室 (HI- 1 3 )的低能放射性核束线 (GIRAFFE) ,开展放射性核束物理和核天体物理研究 ,拟解决的关键科学问题是 :远离β稳定线核的结构与反应 ;超重新核素及近滴线核素的合成和性质研究 ,极端同位旋非对称核物质特性和关键的天体核反应研究 .研究内容分成 7个课题 :(1 )晕核研究 ;(2 )新核素合成及超重新核素研究 ;(3 )丰中子核结构和反应 ;(4)丰质子核结构和反应 ;(5 )高自旋的同位旋相关性 ;(6 )关键天体核反应 ;(7)系统的理论研究 .上述研究也将是2005年建成的国家大科学工程——兰州冷却贮存环的主要科学目标的研究基础 .简述了近期的主要工作进展. Based on the intermediate energy radioactive Ion Beam Line in Lanzhou (RIBLL) of Heavy Ion Research Facility in Lanzhou(HIRFL) and Low Energy Radioactive Ion Beam Line (GIRAFFE) of Beijing National Tandem Accelerator Lab (HI-13) the radioactive ion beam physics and nuclear astrophysics will be researched in detail. The key scientific problems which will be researched as high priority are: the nuclear structure and reaction for nucleus far from β-stability line; the syntheses...
基于兰州重离子加速器国家实验室 (HIRFL )的中能放射性核束线 (RIBLL)及北京串列加速器国家实验室 (HI- 1 3 )的低能放射性核束线 (GIRAFFE) ,开展放射性核束物理和核天体物理研究 ,拟解决的关键科学问题是 :远离β稳定线核的结构与反应 ;超重新核素及近滴线核素的合成和性质研究 ,极端同位旋非对称核物质特性和关键的天体核反应研究 .研究内容分成 7个课题 :(1 )晕核研究 ;(2 )新核素合成及超重新核素研究 ;(3 )丰中子核结构和反应 ;(4)丰质子核结构和反应 ;(5 )高自旋的同位旋相关性 ;(6 )关键天体核反应 ;(7)系统的理论研究 .上述研究也将是2005年建成的国家大科学工程——兰州冷却贮存环的主要科学目标的研究基础 .简述了近期的主要工作进展. Based on the intermediate energy radioactive Ion Beam Line in Lanzhou (RIBLL) of Heavy Ion Research Facility in Lanzhou(HIRFL) and Low Energy Radioactive Ion Beam Line (GIRAFFE) of Beijing National Tandem Accelerator Lab (HI-13) the radioactive ion beam physics and nuclear astrophysics will be researched in detail. The key scientific problems which will be researched as high priority are: the nuclear structure and reaction for nucleus far from β-stability line; the syntheses...
2001, 18(4): 215-218.
doi: 10.11804/NuclPhysRev.18.04.215
摘要:
简要介绍了当前强作用物理研究的基本目标 .对其中QCD的参数和强子谱研究的问题做了较细致的讨论 ,特别是讨论了北京正负电子对撞机 /北京谱仪可以开展的强子物理实验研究.The basic goals for the study of hadronic physics are briefly discussed. The determination of the QCD parameters and the study of the hadron spectroscopy are discussed in more detail. It is shown that BEPC/BES can play a role in the study of hadron physics.
简要介绍了当前强作用物理研究的基本目标 .对其中QCD的参数和强子谱研究的问题做了较细致的讨论 ,特别是讨论了北京正负电子对撞机 /北京谱仪可以开展的强子物理实验研究.The basic goals for the study of hadronic physics are briefly discussed. The determination of the QCD parameters and the study of the hadron spectroscopy are discussed in more detail. It is shown that BEPC/BES can play a role in the study of hadron physics.
2001, 18(4): 219-224.
doi: 10.11804/NuclPhysRev.18.04.219
摘要:
由 Bethe- Salpeter理论形式和一般的相对论协变量子场论出发,用一个简单的复合模型说明 ,实验观察到的 μ介子反常磁矩对标准模型的偏离可能是轻子内部的结构效应 ,并且在不同的重组元和轻组元的情况下给出对轻子半径的限制. Based on the Bethe-Salpeter formalism and the general relativistic covariant quantum field theory, we illustrate with a simple composite model that the observed deviation of (g-2) μ can be an effect of the substructure of muon and give the constraints on the radius of muon in different cases of light constituents and heavy constituents.
由 Bethe- Salpeter理论形式和一般的相对论协变量子场论出发,用一个简单的复合模型说明 ,实验观察到的 μ介子反常磁矩对标准模型的偏离可能是轻子内部的结构效应 ,并且在不同的重组元和轻组元的情况下给出对轻子半径的限制. Based on the Bethe-Salpeter formalism and the general relativistic covariant quantum field theory, we illustrate with a simple composite model that the observed deviation of (g-2) μ can be an effect of the substructure of muon and give the constraints on the radius of muon in different cases of light constituents and heavy constituents.
2001, 18(4): 225-231.
doi: 10.11804/NuclPhysRev.18.04.225
摘要:
利用推广 Gross- Pitaevskii方程 ,分别研究了 (2 +1 )维时空和 3维空间的 Bose- Einstein凝聚体中涡旋的拓扑结构 .这一推广的方程能够被用于非均匀并且高度非线形的 Bose- Einstein凝聚系统 .利用Φ映射拓扑流理论 ,给出了基于序参数的涡旋速度场,以及该速度场的拓扑结构 .最后 ,仔细地探讨了这两种 Bose- Einstein系统中涡旋的各种分支条件.We studied the topological structure of vortex in the Bose-Einstein condensation with a generalized Gross-Pitaevskii equation in (2+1)-dimensional space-time and 3-dimensional space, respectively. Such equation can be used in discussing Bose-Einstein condensates in heterogeneous and highly nonlinear systems. An explicit expression for the vortex velocity field as a function of the order parameter field is derived in terms of the Φ -mapping theory, and the topological structure of ...
利用推广 Gross- Pitaevskii方程 ,分别研究了 (2 +1 )维时空和 3维空间的 Bose- Einstein凝聚体中涡旋的拓扑结构 .这一推广的方程能够被用于非均匀并且高度非线形的 Bose- Einstein凝聚系统 .利用Φ映射拓扑流理论 ,给出了基于序参数的涡旋速度场,以及该速度场的拓扑结构 .最后 ,仔细地探讨了这两种 Bose- Einstein系统中涡旋的各种分支条件.We studied the topological structure of vortex in the Bose-Einstein condensation with a generalized Gross-Pitaevskii equation in (2+1)-dimensional space-time and 3-dimensional space, respectively. Such equation can be used in discussing Bose-Einstein condensates in heterogeneous and highly nonlinear systems. An explicit expression for the vortex velocity field as a function of the order parameter field is derived in terms of the Φ -mapping theory, and the topological structure of ...
2001, 18(4): 232-237.
doi: 10.11804/NuclPhysRev.18.04.232
摘要:
指出8 7Rb2 蒸汽实验中出现的奇怪简并态应当用 Yangian描述 ,并推广这一概念进一步建议用加压的低激发态惰性气体实验检验与 Yangian有关的谱 . We show that the degenerate states appearing in the experiment of the condensed vapor of 87 Rb 2 can be described by Yangian. Furthermore, the model for three angular momentum system is solved through Yangian that can be checked by the experiments for lower excited states of Inert Gas atoms under pressure.
指出8 7Rb2 蒸汽实验中出现的奇怪简并态应当用 Yangian描述 ,并推广这一概念进一步建议用加压的低激发态惰性气体实验检验与 Yangian有关的谱 . We show that the degenerate states appearing in the experiment of the condensed vapor of 87 Rb 2 can be described by Yangian. Furthermore, the model for three angular momentum system is solved through Yangian that can be checked by the experiments for lower excited states of Inert Gas atoms under pressure.
2001, 18(4): 238-244.
doi: 10.11804/NuclPhysRev.18.04.238
摘要:
从动力学对称性观点出发考察了量子规则运动与无规运动 .用能级动力学研究了从量子规则运动向量子无规运动的过渡 ,给出了导致能级混沌的条件 ,揭示了造成能级混沌的机制 .用混沌态矢的特征解释了原子核的各态历经集体态的衰变特性 .研究了重离子碰撞中核耗散与动力学对称性破坏之间的关系. Quantum regular and irregular motions are investigated from the viewpoint of dynamical symmetry. The transition from quantum regular motion to chaotic motion is studied by level dynamics and computer experiments. The conditions for onset of quantum chaos are presented.The mechanism for causing chaotic level spectrum is unveiled. The decay behavior of the nuclear ergodic collective states is explained in terms of the peculiar property of chaotic states. The connection between nuclear...
从动力学对称性观点出发考察了量子规则运动与无规运动 .用能级动力学研究了从量子规则运动向量子无规运动的过渡 ,给出了导致能级混沌的条件 ,揭示了造成能级混沌的机制 .用混沌态矢的特征解释了原子核的各态历经集体态的衰变特性 .研究了重离子碰撞中核耗散与动力学对称性破坏之间的关系. Quantum regular and irregular motions are investigated from the viewpoint of dynamical symmetry. The transition from quantum regular motion to chaotic motion is studied by level dynamics and computer experiments. The conditions for onset of quantum chaos are presented.The mechanism for causing chaotic level spectrum is unveiled. The decay behavior of the nuclear ergodic collective states is explained in terms of the peculiar property of chaotic states. The connection between nuclear...
2001, 18(4): 245-248.
doi: 10.11804/NuclPhysRev.18.04.245
摘要:
在夸克质量密度相关模型处理奇异夸克物质滴时 ,会发现其半径随温度增加而变小 .为克服这一困难 ,我们通过使口袋常数 B温度参数化 ,引入了夸克质量密度温度相关模型 .在这一模型中 ,B=B0 [1 - a(T/Tc) +b(T/Tc) 2 ],文章中讨论了参数 a,b的取法. It is found that the radius for a stable strangelet is a decreasing function of temperature in quark mass density- dependent model. To overcome this difficulty, we extend this model to quark mass density- and temperature- dependent model in which the vacuum energy density at zero baryon density limit B depends on temperature. An ansatz B=B 0[1-a(T/T c )+b(T/T c ) 2] is introduced and the regions for the best choice of the parameters are studied.
在夸克质量密度相关模型处理奇异夸克物质滴时 ,会发现其半径随温度增加而变小 .为克服这一困难 ,我们通过使口袋常数 B温度参数化 ,引入了夸克质量密度温度相关模型 .在这一模型中 ,B=B0 [1 - a(T/Tc) +b(T/Tc) 2 ],文章中讨论了参数 a,b的取法. It is found that the radius for a stable strangelet is a decreasing function of temperature in quark mass density- dependent model. To overcome this difficulty, we extend this model to quark mass density- and temperature- dependent model in which the vacuum energy density at zero baryon density limit B depends on temperature. An ansatz B=B 0[1-a(T/T c )+b(T/T c ) 2] is introduced and the regions for the best choice of the parameters are studied.
2001, 18(4): 249-251.
doi: 10.11804/NuclPhysRev.18.04.249
摘要:
电中性的 K* (892 )电磁质量可以大于带电荷的 K* (892 ) .这是异乎寻常的现象 ,将被称为K* -电磁质量反常 .评述了这个课题 ,并指出 K* 的质量劈裂可以在北京谱仪 (BES)上作精密测量. Electromagnetic masses of neutral K *(892) may be larger than one of charged K *(892). It is unusual and is called K *-EM-mass anomaly. We review the studies on this issue, and point out that K *-mass splitting can be measured in BES accurately.
电中性的 K* (892 )电磁质量可以大于带电荷的 K* (892 ) .这是异乎寻常的现象 ,将被称为K* -电磁质量反常 .评述了这个课题 ,并指出 K* 的质量劈裂可以在北京谱仪 (BES)上作精密测量. Electromagnetic masses of neutral K *(892) may be larger than one of charged K *(892). It is unusual and is called K *-EM-mass anomaly. We review the studies on this issue, and point out that K *-mass splitting can be measured in BES accurately.
2001, 18(4): 252-260.
doi: 10.11804/NuclPhysRev.18.04.252
摘要:
Wigner- Dyson型的随机矩阵理论作为一种可能的统计分析方法用来分析高能重离子碰撞中所产生的粒子谱的某些无规性 ,此统计分析方法被用来初步分析了EMU0 1的实验结果 ,通过分析可以看出在 CERN/SPS和 BNL/AGS能区粒子主要是随机产生的. In high energy heavy ion collisions, a possible measure for a certain irregularity of the spectra of produced particles is proposed by using the Wigner-Dyson statistical analysis method. The preliminary results from EMU01 experiments are given by using this statistical analysis method. The analysis shows that the dominant effect is random emission in available high energy nucleus-nucleus collisions at CERN/SPS and BNL/AGS regions.
Wigner- Dyson型的随机矩阵理论作为一种可能的统计分析方法用来分析高能重离子碰撞中所产生的粒子谱的某些无规性 ,此统计分析方法被用来初步分析了EMU0 1的实验结果 ,通过分析可以看出在 CERN/SPS和 BNL/AGS能区粒子主要是随机产生的. In high energy heavy ion collisions, a possible measure for a certain irregularity of the spectra of produced particles is proposed by using the Wigner-Dyson statistical analysis method. The preliminary results from EMU01 experiments are given by using this statistical analysis method. The analysis shows that the dominant effect is random emission in available high energy nucleus-nucleus collisions at CERN/SPS and BNL/AGS regions.
2001, 18(4): 261-265.
doi: 10.11804/NuclPhysRev.18.04.261
摘要:
介绍一种精确的方法 ,在质心坐标系中 ,把量子 N体系统的整体转动自由度和内部运动自由度完全地分离开来 .对于确定的轨道角动量状态 ,找到了一组完备且独立的角动量本征函数基 ,它们是坐标分量的齐次多项式 ,且满足 Laplace方程 .系统中的任何角动量本征函数都可以用这组函数基展开 ,组合系数只依赖于内部变量 ,称为广义径向函数 .可以简单且明显地推导出广义径向函数所满足的广义径向方程 .函数和方程式都只依赖于 (3 N- 6 )个内部变量 ,而且个数是有限的. A method without any approximation to separate the global rotational degrees of freedom in the Schrdinger equation for an N -body system completely from the internal ones is presented. For given orbital angular momentum states, we discover a complete set of independent base-functions, which are homogeneous polynomials in the components of the coordinate vectors and satisfy the Laplace equation. Any function with the given angular momentum and the given parity in the system can be...
介绍一种精确的方法 ,在质心坐标系中 ,把量子 N体系统的整体转动自由度和内部运动自由度完全地分离开来 .对于确定的轨道角动量状态 ,找到了一组完备且独立的角动量本征函数基 ,它们是坐标分量的齐次多项式 ,且满足 Laplace方程 .系统中的任何角动量本征函数都可以用这组函数基展开 ,组合系数只依赖于内部变量 ,称为广义径向函数 .可以简单且明显地推导出广义径向函数所满足的广义径向方程 .函数和方程式都只依赖于 (3 N- 6 )个内部变量 ,而且个数是有限的. A method without any approximation to separate the global rotational degrees of freedom in the Schrdinger equation for an N -body system completely from the internal ones is presented. For given orbital angular momentum states, we discover a complete set of independent base-functions, which are homogeneous polynomials in the components of the coordinate vectors and satisfy the Laplace equation. Any function with the given angular momentum and the given parity in the system can be...
2001, 18(4): 266-273.
doi: 10.11804/NuclPhysRev.18.04.266
摘要:
根据从 QCD生成泛函所建立的夸克和反夸克的传播子、四点格林函数及其它类型的格林函数所满足的运动方程 ,推导出了夸克 -反夸克束缚态的 Bethe- Salpeter方程中相互作用核的明显且封闭的表示式 ,给出了这个表示式的未重整化和重整化了的形式 .这个表示式不仅易于进行微扰计算 ,而且适于进行非微扰的计算 ,特别是它提供了求解夸克禁闭问题一个恰当的理论出发点.The interaction kernel in the Bethe-Salpeter equation for quark-antiquark bound states is derived from the Bethe-Salpeter equations satisfied by the quark-antiquark four-point Green s function. The latter equations are established based on the equations of motion obeyed by the quark and antiquark propagators, the four-point Green s function and some other kinds of Green s functions which follow directly from the QCD generating function. The Bethe-Salpeter kernel derived is an exact...
根据从 QCD生成泛函所建立的夸克和反夸克的传播子、四点格林函数及其它类型的格林函数所满足的运动方程 ,推导出了夸克 -反夸克束缚态的 Bethe- Salpeter方程中相互作用核的明显且封闭的表示式 ,给出了这个表示式的未重整化和重整化了的形式 .这个表示式不仅易于进行微扰计算 ,而且适于进行非微扰的计算 ,特别是它提供了求解夸克禁闭问题一个恰当的理论出发点.The interaction kernel in the Bethe-Salpeter equation for quark-antiquark bound states is derived from the Bethe-Salpeter equations satisfied by the quark-antiquark four-point Green s function. The latter equations are established based on the equations of motion obeyed by the quark and antiquark propagators, the four-point Green s function and some other kinds of Green s functions which follow directly from the QCD generating function. The Bethe-Salpeter kernel derived is an exact...
2001, 18(4): 274-275.
doi: 10.11804/NuclPhysRev.18.04.274
摘要:
研究了对 Faddeev- Popov方法有关键意义的局域规范群上不变测度的存在性问题 .证明了局域规范群 C∞ (M,G) (M为一紧致流形 ,G为一矩阵李群 )上不存在有限的平移不变的正测度. In is proved that on the local gauge group C ∞ (M,G) ( M a compact manifold and G a matrix Lie group) there does not exist a finite positive invariant measure.
研究了对 Faddeev- Popov方法有关键意义的局域规范群上不变测度的存在性问题 .证明了局域规范群 C∞ (M,G) (M为一紧致流形 ,G为一矩阵李群 )上不存在有限的平移不变的正测度. In is proved that on the local gauge group C ∞ (M,G) ( M a compact manifold and G a matrix Lie group) there does not exist a finite positive invariant measure.
2001, 18(4): 276-281.
doi: 10.11804/NuclPhysRev.18.04.276
摘要:
最近的研究工作表明原子核阻止强烈地依赖于两核子碰撞截面而较弱的依赖同位旋相关的平均场 (对称势 ) .故原子核阻止可以作为提取介质中同位旋相关核子 -核子碰撞截面的探针 .详细的计算表明动量相关作用在提高原子核阻止对两体碰撞的敏感性和减弱对称对称势的敏感性中起了重要作用. The role of momentum dependence equation of state on the nuclear stoppings coming from the isospin dependence of nucleon-nucleon cross section (two-body dissipation ) and the isospin dependence of the mean field (one-body dissipation) are studied by using the isospin dependence quantum molecular dynamics. A detail studies indicate that the difference between the nuclear stoppings coming from the isospin dependence and the isospin independence of in-medium nucleon-nucleon...
最近的研究工作表明原子核阻止强烈地依赖于两核子碰撞截面而较弱的依赖同位旋相关的平均场 (对称势 ) .故原子核阻止可以作为提取介质中同位旋相关核子 -核子碰撞截面的探针 .详细的计算表明动量相关作用在提高原子核阻止对两体碰撞的敏感性和减弱对称对称势的敏感性中起了重要作用. The role of momentum dependence equation of state on the nuclear stoppings coming from the isospin dependence of nucleon-nucleon cross section (two-body dissipation ) and the isospin dependence of the mean field (one-body dissipation) are studied by using the isospin dependence quantum molecular dynamics. A detail studies indicate that the difference between the nuclear stoppings coming from the isospin dependence and the isospin independence of in-medium nucleon-nucleon...
2001, 18(4): 282-284.
doi: 10.11804/NuclPhysRev.18.04.282
摘要:
利用粒子 -转子模型研究三轴超形变核态,讨论了区别轴对称超形变和三轴超形变可能的实验信息.为了直接从实验上识别三轴超形变带,必须同时测量能谱和电磁跃迁几率. Current developments in triaxial superdeformed states in nuclei are discussed from a theoretical perspective. A detailed analysis of superdeformed triaxial bands is made with particle-rotor model. Experimental information which may differentiate triaxial superdeformation from axially-symmetric superdeformation is disussed. In order to identify the superdeformed triaxial bands both the energy spectra and electromagnetic transition.
利用粒子 -转子模型研究三轴超形变核态,讨论了区别轴对称超形变和三轴超形变可能的实验信息.为了直接从实验上识别三轴超形变带,必须同时测量能谱和电磁跃迁几率. Current developments in triaxial superdeformed states in nuclei are discussed from a theoretical perspective. A detailed analysis of superdeformed triaxial bands is made with particle-rotor model. Experimental information which may differentiate triaxial superdeformation from axially-symmetric superdeformation is disussed. In order to identify the superdeformed triaxial bands both the energy spectra and electromagnetic transition.
2001, 18(4): 285-288.
doi: 10.11804/NuclPhysRev.18.04.285
摘要:
简要介绍了中子晕和质子晕研究的最新实验进展,同时,讨论了近年来发展的同位旋,能量有关的具有晕核结构的Glauber理论及它在描述晕核与核散射时的重要性.The development of new experiments for neutron (or proton) halo is briefly described, while the isospin and energy dependence of Glauber theory and its importance in describing halo nuclei-nucleus scattering are discussed.
简要介绍了中子晕和质子晕研究的最新实验进展,同时,讨论了近年来发展的同位旋,能量有关的具有晕核结构的Glauber理论及它在描述晕核与核散射时的重要性.The development of new experiments for neutron (or proton) halo is briefly described, while the isospin and energy dependence of Glauber theory and its importance in describing halo nuclei-nucleus scattering are discussed.
2001, 18(4): 289-291.
doi: 10.11804/NuclPhysRev.18.04.289
摘要:
基于中子分离能的分析 ,Ozawa等提出丰中子轻核存在新幻数 N=1 6.对 N=1 6同中子素进行了形变和球形的相对论平均场计算 .相对论平均场的数值结果表明N=1 6同中子素有形状相变.这是一些丰中子核新幻数出现的可能原因. Based on the analysis of neutron-separation energies, Ozawa et al proposed a new magic number N =16 in light neutron-rich nuclei. The deformed and spherical relativistic mean-field(RMF) calculations have been carried out for N =16 isotones. The numerical relativistic mean-field results show there is a shape transition in N =16 isotones. This is the possible cause of the appearance of the new magic number in someneutron-rich nuclei.
基于中子分离能的分析 ,Ozawa等提出丰中子轻核存在新幻数 N=1 6.对 N=1 6同中子素进行了形变和球形的相对论平均场计算 .相对论平均场的数值结果表明N=1 6同中子素有形状相变.这是一些丰中子核新幻数出现的可能原因. Based on the analysis of neutron-separation energies, Ozawa et al proposed a new magic number N =16 in light neutron-rich nuclei. The deformed and spherical relativistic mean-field(RMF) calculations have been carried out for N =16 isotones. The numerical relativistic mean-field results show there is a shape transition in N =16 isotones. This is the possible cause of the appearance of the new magic number in someneutron-rich nuclei.
2001, 18(4): 292-295.
doi: 10.11804/NuclPhysRev.18.04.292
摘要:
采用近来在研究核基态中极为成功的相对论模型研究有限核的同位旋巨单极共振 ,从而给出核物质的不可压缩性系数 .讨论了建立在相对论平均场基态上的相对论无规位相近似的自洽处理 .自洽要求基态和巨共振激发态的研究从同一个有效拉氏量出发 .与相对论平均场的无海近似自洽 ,相对论无规位相近似不仅要包含正能态的粒子 -空穴激发 ,还必须考虑 Fermi海核子态和 Dirac海核子态激发的贡献 .用约束的相对论平均场方法得到核的巨单极共振的能量逆权重的求和规则 ,验证 Dirac海核子态的贡献 .比较理论计算和实验测量的巨单极共振的能量得到核物质的不可压缩性系数为 2 5 0 - 2 70 MeV. The isoscalar giant monopole resonance for finite nuclei and the nuclear matter incompressibility are studied in a consistent relativistic approach, which achieves a great success in describing the properties of nuclear ground states. The consistency in the relativistic random phase approximation (RRPA) built on the relativistic mean field (RMF) ground states are investigated. The RMF wave function of nucleus and the particle-hole residual interactions in RRPA are calculated from...
采用近来在研究核基态中极为成功的相对论模型研究有限核的同位旋巨单极共振 ,从而给出核物质的不可压缩性系数 .讨论了建立在相对论平均场基态上的相对论无规位相近似的自洽处理 .自洽要求基态和巨共振激发态的研究从同一个有效拉氏量出发 .与相对论平均场的无海近似自洽 ,相对论无规位相近似不仅要包含正能态的粒子 -空穴激发 ,还必须考虑 Fermi海核子态和 Dirac海核子态激发的贡献 .用约束的相对论平均场方法得到核的巨单极共振的能量逆权重的求和规则 ,验证 Dirac海核子态的贡献 .比较理论计算和实验测量的巨单极共振的能量得到核物质的不可压缩性系数为 2 5 0 - 2 70 MeV. The isoscalar giant monopole resonance for finite nuclei and the nuclear matter incompressibility are studied in a consistent relativistic approach, which achieves a great success in describing the properties of nuclear ground states. The consistency in the relativistic random phase approximation (RRPA) built on the relativistic mean field (RMF) ground states are investigated. The RMF wave function of nucleus and the particle-hole residual interactions in RRPA are calculated from...
2001, 18(4): 296-299.
doi: 10.11804/NuclPhysRev.18.04.296
摘要:
利用扩展的 Brueckner- Hartree- Fock理论与推广的 BCS方法研究了自能的色散效应和基态关联对中子物质中超流性和能隙的影响 .研究结果表明 ,自能的色散效应使中子物质中能隙减小;考虑基态关联后 ,超流性将进一步减弱. The effects of the dispersion and ground state correlation of the single particle self-energy on neutron matter superfluidity have been investigated in the framework of the Extended Brueckner-Hartree-Fock and the generalized BCS approaches. A sizable reduction of the energy gap is found due to the energy dependence of the self-energy. And the inclusion of the ground state correlations in the self-energy suppresses further the neutron matter superfluidity.
利用扩展的 Brueckner- Hartree- Fock理论与推广的 BCS方法研究了自能的色散效应和基态关联对中子物质中超流性和能隙的影响 .研究结果表明 ,自能的色散效应使中子物质中能隙减小;考虑基态关联后 ,超流性将进一步减弱. The effects of the dispersion and ground state correlation of the single particle self-energy on neutron matter superfluidity have been investigated in the framework of the Extended Brueckner-Hartree-Fock and the generalized BCS approaches. A sizable reduction of the energy gap is found due to the energy dependence of the self-energy. And the inclusion of the ground state correlations in the self-energy suppresses further the neutron matter superfluidity.
2001, 18(4): 300-307.
doi: 10.11804/NuclPhysRev.18.04.300
摘要:
提出了坡密子就是质量～2 .2 Ge V、量子数为 IGJPC=0 + 2 + +的张量胶子球的雷其轨迹.高能质子 -质子弹性散射微分截面的研究表明 ,这个猜想与张量胶子球的实验材料完全一致的. We propose that the Pomeron is a Regge trajectory of tensor glueballs with the lightest member having a mass in the 2.2 GeV region and the quantum numbers I G J PC = 0 + 2 ++ . By using the well-established high-energy proton-proton elastic scattering differential cross sections, we show that our conjecture is fully consistent with the observed ξ production data.
提出了坡密子就是质量～2 .2 Ge V、量子数为 IGJPC=0 + 2 + +的张量胶子球的雷其轨迹.高能质子 -质子弹性散射微分截面的研究表明 ,这个猜想与张量胶子球的实验材料完全一致的. We propose that the Pomeron is a Regge trajectory of tensor glueballs with the lightest member having a mass in the 2.2 GeV region and the quantum numbers I G J PC = 0 + 2 ++ . By using the well-established high-energy proton-proton elastic scattering differential cross sections, we show that our conjecture is fully consistent with the observed ξ production data.
2001, 18(4): 308-315.
doi: 10.11804/NuclPhysRev.18.04.308
摘要:
通过观察和分析重核和超重核中量子谱的统计性质 ,研究有限物理体系中量子混沌的一些问题 .介绍了原子核中量子谱显示的有序 -混沌现象随激发能变化的实验数据 ,研究了超重核体系中量子谱相邻能级间距分布的规则性随体系的依赖关系 ,并预言了稳定的超重体系 .给出了原子核有序混沌相变现象与原子核形变以及原子核转动的依赖关系 ,讨论了量子体系中的对效应对有序 -混沌相变的影响 .最后 ,用有序 -混沌相变的概念解释和理解了核物理中一些重要的实验现象. Some aspects of quantum chaos in a finite system had been studied based on the analysis of statistical behaviors of quantum spectra in heavy and superheavy nuclei. The dependence of the transition from order to chaos on nuclear deformation and nuclear rotatation had been described. The influence of pairing effect on the statistical properties of spectra is also discussed. Some important experiment phenomena in nuclear physics had been understood from the point of view of interplay...
通过观察和分析重核和超重核中量子谱的统计性质 ,研究有限物理体系中量子混沌的一些问题 .介绍了原子核中量子谱显示的有序 -混沌现象随激发能变化的实验数据 ,研究了超重核体系中量子谱相邻能级间距分布的规则性随体系的依赖关系 ,并预言了稳定的超重体系 .给出了原子核有序混沌相变现象与原子核形变以及原子核转动的依赖关系 ,讨论了量子体系中的对效应对有序 -混沌相变的影响 .最后 ,用有序 -混沌相变的概念解释和理解了核物理中一些重要的实验现象. Some aspects of quantum chaos in a finite system had been studied based on the analysis of statistical behaviors of quantum spectra in heavy and superheavy nuclei. The dependence of the transition from order to chaos on nuclear deformation and nuclear rotatation had been described. The influence of pairing effect on the statistical properties of spectra is also discussed. Some important experiment phenomena in nuclear physics had been understood from the point of view of interplay...
2001, 18(4): 316-327.
doi: 10.11804/NuclPhysRev.18.04.316
摘要:
评述了近半个世纪来核子结构研究的主要进展,着重评述了近十年来用极化轻子深度非弹散射研究核子自旋、磁矩结构的进展.也还评述了当前核子结构研究中的重要问题. The essential developments of the nucleon structure studies in the last half century are reviewed. The nucleon spin and magnetic moment structure studies with the polarized lepton nucleon deep inelastic scattering in the recent years are specially analyzed. The important topics in the contamporary studies of the nucleon structure is discussed.
评述了近半个世纪来核子结构研究的主要进展,着重评述了近十年来用极化轻子深度非弹散射研究核子自旋、磁矩结构的进展.也还评述了当前核子结构研究中的重要问题. The essential developments of the nucleon structure studies in the last half century are reviewed. The nucleon spin and magnetic moment structure studies with the polarized lepton nucleon deep inelastic scattering in the recent years are specially analyzed. The important topics in the contamporary studies of the nucleon structure is discussed.
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