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第十二届全国核物理大会暨第七届会员代表大会

作者： Yan-Song Li~(1,2), and GuiLu Long~(1,2,3,4) Department of physics, Tsinghua University, Beijing 100084 Key laboratory For Quantum Information and Measurements, Beijing 100084 Institute of theoretical physics, Chinese Academy of Sciences, Beijing 100080 center of nuclear theory, lanzhou heavy ion accelerator national laboratory, lanzhou, 730000

We develop a relativistic nuclear structure model, the RElativistic Consistent Angular-momentum Projected Shell-model(RECAPS)[1,2] which combines the relativistic mean field theory with the angular-momentum projection method. In this new model, nuclear ground-state properties are first calculated consistently using

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A bound on the effective boson number from shape phase transition in IBM

A bound on the effective boson number from shape phase trans...

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第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： Yu Zhang~(1 2)) Zhan-feng Hou~(2)) Yu-xin Liu~(2 3)) Feng Pan~(1)) 1(Department of physics,Liaoning Normal University,Dalian 116029,china) 2(Department of physics and State Key laboratory of nuclear physics and Technology Peking University,Beijing 100871, china) 3(center of theoretical nuclear physics,national laboratory of heavy ion accelerator,lanzhou 730000,china)

We study the effects driven by the boson number on the critical behavior of some observable quantities that are sensitive to the nuclear shape phase transitions in the interacting boson model（IBM）.By comparing the experiments with the theory calculation,we find that the effective boson number in IBM best consistent to experiments is not more than the total pairs number of valence nucleons or holes,and an up bound of the effective boson number can be found in the U（5）-O（6） transition region at least in ***, two trajectories of second order phase transitions,the isotones with neutron number N_n=62 and the one with N_n=74,are confirmed by comparing the observable quantities in experiments with those in theory

关键词： keyword1 keyword2 keyword3 keyword4

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偶偶Cd同位素核的负宇称带研究

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四川大学学报（自然科学版） 2003年第1期40卷 77-80页

作者：徐延冰刘英太廖继志兰州重离子加速器国家实验室原子核理论中心兰州730000 北京大学技术物理系北京100871 四川大学物理科学与技术学院成都610064

作者将具有正宇称的gds轨道空间扩大到包含具有负宇称的1h11/2轨道,采用修正的表面δ相互作用(MSDI),对106Cd和108Cd两个偶偶核作了形变Hatree Fock(HF)计算,得到了基态和一些激发态的解.同时,还用近似角动量投影形变Hartree Fock(PDHF... 详细信息

作者将具有正宇称的gds轨道空间扩大到包含具有负宇称的1h11/2轨道,采用修正的表面δ相互作用(MSDI),对106Cd和108Cd两个偶偶核作了形变Hatree Fock(HF)计算,得到了基态和一些激发态的解.同时,还用近似角动量投影形变Hartree Fock(PDHF)方法,对106Cd和108Cd进行了能谱计算,得到其正、负宇称带的解,计算结果与实验谱基本一致.

关键词：偶偶Cd同位素核角动量投影单粒子能谱负宇称带核结构基态激发态

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Isospin Dependent Effective Interaction

Isospin Dependent Effective Interaction

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CCAST“放射性束物理”研讨会

作者： Ma Zhong-yu, Liu Ling, Chen Bao-qiu china Institute of Atomic Energy, Beijing 102413also center of nuclear theoretical physics,national laboratory of heavy ion acceleratorXanzhou 730000 and Institute of theoretical physics.Beijing 100080

The asymmetric nuclear matter is investigated in the DBHF approach with a newdecomposition of the Dirac structure of nucleon self-energy from the G matrix. It isfound that the isospin dependence of the scalar and vector potentials is rather weak,although both potentials for neutron(proton) become deep(shallow) in the neutron richnuclear matter. The results in asymmetric nuclear matter are rather different fromthose obtained in a simple method, where the nucleon self-energy is deduced from thesingle particle energy. The nuclear binding energy as a function of the asymmetryparameter fulfills the empirical parabolic law up to very extreme isospin asymmetricnuclear matter in the DBHF approach. The behavior of the density dependence of theasymmetry energy is different from those obtained in non-relativistic approaches,although both give similar asymmetry energy at the nuclear saturation density.

关键词： Dirac structure of nucleon self-energy Dirac G matrix Asymmetric nuclear matter

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Empirical evidence for the nucleus at the critical point of the Uπν（5）-SUπν*（3） transition in IBM2

Empirical evidence for the nucleus at the critical point of ...

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第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： Da-li Zhang~(1 1)) Zhan-feng Hou~(2 2)) Yu-xin Liu~(2,3 3)) 1(Department of physics,Huzhou Techer's College,Huzhou 313000,Zhejiang,china) 2(Department of physics and State Key laboratory of nuclear physics and Technology,Peking University,Beijing 100871, china) 3(center of theoretical nuclear physics,national laboratory of heavy ion accelerator,lanzhou 730000,china)

By analyzing the low-lying energy spectrum,certain energy rations and B（E2） ratios,we show that the predicted properties of the critical point of the transition from U（5） symmetry to SU（3） symmetry agree well with the experimental data of nucleus *** indicates that Xe is an empirical evidence for the nucleus at the critical point of the U（5）-SU（3） transition and such a critical point may involve considerable constituent ofγ-unstable rotation.

关键词： 130Xe second-order transition

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有限温度下Na4团簇的异构化

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原子与分子物理学报 1999年第1期16卷 33-38页

作者：王锋张丰收柯学志朱志远兰州重离子加速器国家实验室原子核理论研究中心中国科学院近代物理研究所中国科学院上海原子核所

在紧密结合分子动力学模型基础上，对Ｎａ４的两种异构体Ｄ２ｈ和Ｃ２ｖ的结构性质随温度的变化进行了系统性研究。发现在低温时（温度Ｔ＜１００Ｋ），这两种异构体具有明显的不同；在较高温度时（温度Ｔ≥１００Ｋ），能够发现Ｃ２ｖ... 详细信息

在紧密结合分子动力学模型基础上，对Ｎａ４的两种异构体Ｄ２ｈ和Ｃ２ｖ的结构性质随温度的变化进行了系统性研究。发现在低温时（温度Ｔ＜１００Ｋ），这两种异构体具有明显的不同；在较高温度时（温度Ｔ≥１００Ｋ），能够发现Ｃ２ｖ和Ｄ２ｈ两种异构体之间的转变；在更高温度时（温度Ｔ＝４００Ｋ），这两种异构体Ｃ２ｖ和Ｄ２ｈ都处于液态。

关键词： Na4团簇异构化紧密结合分子动力学模型

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化学非平衡夸克-胶子物质中等质量双轻子的产生

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物理学报 2003年第11期52卷 2831-2835页

作者：贺泽君龙家丽马国亮马余刚张家驹刘波中国科学院上海原子核研究所中国科学院高能物理研究所北京100039

研究了正在进行化学平衡的富重子夸克胶子物质的双轻子产生 ,发现由于产生在RHIC能量的化学非平衡的富重子夸克胶子物质冷却慢和高的初始温度 ,导致中等质量双轻子产生重大增强 .因此 ,中等质量双轻子的增强可以是夸克胶子物质形... 详细信息

研究了正在进行化学平衡的富重子夸克胶子物质的双轻子产生 ,发现由于产生在RHIC能量的化学非平衡的富重子夸克胶子物质冷却慢和高的初始温度 ,导致中等质量双轻子产生重大增强 .因此 ,中等质量双轻子的增强可以是夸克胶子物质形成的信号 .同时 ,这个增强能补偿由于初始夸克化学势增加引起的双轻子抑制 ,因而双轻子产额的抑制不再是夸克胶子物质产生的信号 .

关键词：化学非平衡夸克-胶子物质双轻子热粲夸克夸克化学势夸克碰撞热力学平衡

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Status of theoretical Study on Superheavy Nuclei

Status of Theoretical Study on Superheavy Nuclei

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CCAST“放射性束物理”研讨会

作者： Zhongzhou Ren(1) Department of physics, Nanjing University, Nanjing 210008, P. R. china (2) center of theoretical nuclear physics, Institute of Modern physics, lanzhou 730000, P. R.china

＜正＞At first I will briefly review the new experimental progress of superheavy *** I willtalk about theoretical studies on superheavy *** is mainly on the structure of *** upper limit and a lower limit for the binding energy of superheavy nuclei areestablished based on the relativistic mean-field *** is useful for future calculationsof the cross-section to synthesize a new superheavy *** is also helpful to *** of alpha decay for a unknown superheavy *** some suggestions areproposed in order to speed up the progress of study on superheavy nuclei in china.

关键词： superheavy elements alpha-decay energies lifetimes name of future new element: Chinium (Cn).

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Relativistic mean-field approximation with density-dependent screening meson masses in nuclear matter

Relativistic mean-field approximation with density-dependent...

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CCAST“兰州CSR上的介子物理”研讨会

作者： Bao-Xi Sun,Xiao-Fu Lu, Peng-Man Shen, Ea-Guang Zhao Institute of High Energy physics, The Chinese Academy of Sciences, P.O.Box 918(4), Beijing 100039, china Institute of theoretical physics, The Chinese Academy of Sciences, Beijing 100080, china Department of physics, Sichuan University, Chengdu 610064, china center of theoretical nuclear physics, national laboratory of heavy ion accelerator,lanzhou 730000, china Department of physics, Tsinghua University, Beijing 100084, china and china center of Advanced Science and Technology (World laboratory), Beijing 100080, china

＜正＞ The Debye screening masses of the σ,ωand neutral p mesons and the photon are calculated in the relativistic mean-field approximation. As the density of the nucleon increases, all the screening masses of mesons increase. It shows a different result with Brown-Rho scaling, which implies a reduction in the mass of all the mesons in the nuclear matter except the pion. Replacing the masses of the mesons with their corresponding screening masses in Walecka-1 model, five saturation properties of the nuclear matter are fixed reasonably, and then a density-dependent relativistic mean-field model is proposed without introducing the non-linear self-coupling terms of mesons.

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Improved Glauber model for the reactions induced by Halo Nuclei and Stable Nuclei

Improved Glauber model for the reactions induced by Halo Nuc...

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CCAST“放射性束物理”研讨会

作者： Wenjun Guo, Huanqing Jiang, Jianye Liu Wei zuo, Zhongzhou Ren, Xiguo Lee, Zenghua Li1. center of theoretical nuclear physics, national laboratory of heavy ion accelerator,lanzhou 730000, P.R.china2. Institute of Modem physics, The Chinese Academy of Sciences, lanzhou 730000, P.R.china 3.Institute of High Energy physics, The Chinese Academy of Sciences, Beijing 100039, P.R.china4.physics department of Nanjing University, Nanjing 210008, P.R.china

＜正＞We develop the method for the calculation of the total reaction cross sections induced by thehalo nuclei and stable nuclei. This approach is based on the Glauber theory, which is valid for thereactions at high energies. It is extended for reactions at low energy and at the intermediate energy bycorrecting with the quantum correction and Coulomb correction under the assumption of the effectivenuclear density distribution. The calculated results for the total reaction cross section induced by stablenuclei agrees well with the experimental data within 10 percent accuracy. The comparison between thenumerical results and the experimental data for the neutron halo nucleiand the proton halo nucleiindicates a satisfactory agreement after considering the halo structure of these nuclei, which implies thequite different mean fields for the reactions induced by halo nuclei and stable nuclei. The halo nucleondistributions and the root mean square radii of these nuclei can be extracted from above ***, it is clear to see that the medium correction of the nucleon-nucleon collision has little effecton the total reaction cross sections induced by the halo nuclei due to the very weak binding and the veryextended density distribution, which is quite different from the reactions induced by the stable nucleiwith the salient medium correction.

关键词： total reaction cross section improved Glauber theory halo nuclei

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