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Synthesis of superheavy nuclei with ^(238)U target

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Science china(Physics,Mechanics & Astronomy) 2009年第10期52卷 1482-1488页

作者： LIU ZuHua1,3 & BAO JingDong2,4 1 Key Laboratory of Beam Technology and Material Modification of Ministry of Education,beijing Normal University,beijing 100875,china 2 Department of Physics,beijing Normal University,beijing 100875,china 3 china institute of atomic energy,beijing 102413,china 4 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,china Key Laboratory of Beam Technology and Material Modification of Ministry of Education Beijing Normal University Beijing China china institute of atomic energy Beijing China Department of Physics Beijing Normal University Beijing China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou China

The production of superheavy nuclei with Z=108-116 via hot fusion reactions of the neutron-rich projectiles with 238U target is systematically *** results show that the production cross sections of superheavy nuclei do not decrease monotonously as the atomic number Z *** cross sections of the superheavy nuclei at Z = 112 and 115 are enhanced as compared with the whole Z-trend in synthesis of the superheavy nuclei,which clearly illustrates that the reactions with large negative Q-value and shell correction are more favorable to synthesize superheavy nuclei.

关键词： superheavy nuclei fusion reaction cross section 238U target

Isospin-dependent relativistic microscopic optical potential in the Dirac Brueckner-Hartree-Fock method

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Science china(Physics,Mechanics & Astronomy) 2004年第2期47卷 189-198页

作者： RONG Jian1 & MA Zhongyu1,2,3 1. china institute of atomic energy, beijing 102413, china 2. Center of Nuclear Theoretical Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lan-zhou 730000, china 3. institute of Theoretical Physics, Chinese Academy of Sciences, beijing 100080, china Correspondence should be addressed to Rong Jian (email: jrong@***) china institute of atomic energy Beijing China Center of Nuclear Theoretical Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou China institute of Theoretical Physics Chinese Academy of Sciences Beijing China

The relativistic microscopic optical potential in the asymmetric nuclear matter is studied in the framework of the Dirac Brueckner-Hartree-Fock method. A new decomposition of the Dirac structure of the nuclear self-energy in nuclear matter is adopted. The self-energy of a nucleon with E > 0 in nuclear matter is calculated with the G matrix in the Hartree-Fock approach. The optical potential of a nucleon in the nuclear medium is identified with the nucleon self-energy. The energy and asymmetric parameter dependence of the relativistic optical potentials for proton and neutron are discussed. The resulting Schroedinger equivalent potentials have reasonable behaviors of the energy dependence. The asymmetric parameter dependence of relativistic optical potentials and Schroedinger potentials are emphasized.

关键词： Dirac Brueckner Hartree-Fock, relativistic microscopic optical potential, asymmetric nuclear matter, isospin-dependence.

Calculation of triaxial superdeformation in ^(174)Hf

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Science china(Physics,Mechanics & Astronomy) 2007年第5期50卷 553-557页

作者： YU ShaoYing1,2,4, LI XiaoWei2, SHEN CaiWan1,5 & CHEN YongShou3,4 1 School of Science, Huzhou Teachers College, Huzhou 313000, china 2 College of Mathematics, Physics and Information Engineering, Zhejiang Normal University, Jinhua 321000, china 3 china institute of atomic energy, beijing 102413, china 4 institute of Theoretical Physics, Chinese Academy of Sciences, beijing 100080, china 5 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, china School of Science Huzhou Teachers College Huzhou China College of Mathematics Physics and Information Engineering Zhejiang Normal University Jinhua China institute of Theoretical Physics Chinese Academy of Sciences Beijing China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou China china institute of atomic energy Beijing China

A two-dimensional Total Routhian Surface (TRS) calculation with the fixed hexa- decapole deformation ε4 = 0.03 was carried out for several configurations of 174Hf. Results indicate that the shell corrections have an important contribution to the formation of triaxial superdeformation in 174Hf and some possible configuration assignments are made to the 4 TSD bands experimentally found in 174Hf.

关键词： Total Routhian Surface (TRS), triaxial superdeformation, configuration

Further research on high-spin structure in ^(161)Lu

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Science china(Physics,Mechanics & Astronomy) 2008年第3期51卷 315-320页

作者： LI YanXia1,2,YU ShaoYing1,2,4,SHEN CaiWan1,5,LI XiaoWei6 & CHEN YongShou3,4 1 School of Science,Huzhou Teachers College,Huzhou 313000,china 2 College of Mathematics,Physics and Information Engineering,Zhejiang Normal University,Jinhua 321000,china 3 china institute of atomic energy,beijing 102413,china 4 institute of Theoretical Physics,Chinese Academy of Sciences,beijing 100080,china 5 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,china 6 Department of Physics,Chifeng University,Chifeng 024001,china School of Science Huzhou Teachers College Huzhou China College of Mathematics Physics and Information Engineering Zhejiang Normal University Jinhua China institute of Theoretical Physics Chinese Academy of Sciences Beijing China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou China Department of Physics Chifeng University Chifeng China china institute of atomic energy Beijing China

The two-dimensional total routhian surface (TRS) calculations were performed to probe into the triaxial superdeformed characteristics of a strongly populated band X2 in 161Lu. This band was identified as a triaxial superdeformed band by using our TRS method. We also got its formation mechanics,i.e. the neutron-shell correction energy plays a crucial role,while the rotating energy and the deformation-driving effect of high j intruder orbit i13/2 also play an additional role.

关键词： TRS method triaxial superdeformation formation mechanism

Random Phase Approximation in Relativistic Approach

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原子核物理评论 2009年第S1期26卷 49-54页

作者： MA Zhong-yu1,2,YANG Ding1,TIAN Yuan1,CAO Li-gang2,3(1 china institute of atomic energy,beijing 102413,china 2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Research Facility in Lanzhou,Lanzhou 730000,china 3 institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,china) china institute of atomic energy Beijing 102413China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Research Facility in LanzhouLanzhou 730000China china institute of atomic energy Beijing 102413China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Research Facility in LanzhouLanzhou 730000China institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

Some special issues of the random phase approximation(RPA) in the relativistic approach are reviewed. A full consistency and proper treatment of coupling to the continuum are responsible for the successful application of the RPA in the description of dynamical properties of finite nuclei. The fully consistent relativistic RPA(RRPA) requires that the relativistic mean filed (RMF) wave function of the nucleus and the RRPA correlations are calculated in a same effective Lagrangian and the consistent treatment of the Dirac sea of negative energy states. The proper treatment of the single particle continuum with scattering asymptotic conditions in the RMF and RRPA is discussed. The full continuum spectrum can be described by the single particle Green's function and the relativistic continuum RPA is established. A separable form of the paring force is introduced in the relativistic quasi-particle RPA.

关键词： fully consistent RRPA coupling to the continuum pairing correlation

用原位x射线小角散射研究块体非晶合金Zr_(55)Cu_(30)Al_(10)Ni_5的结构弛豫

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物理学报 2003年第9期52卷 2219-2222页

作者：柳义柳林王俊赵辉荣利霞董宝中中国原子能科学研究院北京102413 华中科技大学材料学院武汉430074 中国科学院高能物理研究所同步辐射实验室北京100039

应用同步辐射x射线小角散射法在原位对块体非晶合金Zr55Cu30 Al1 0 Ni5在等温退火过程中的微结构变化进行研究 .实验表明 :在等温退火过程中电子密度涨落反映了晶化之前的结构弛豫过程 ;在一定的退火温度下、随退火时间的增加 ,拓扑短... 详细信息

应用同步辐射x射线小角散射法在原位对块体非晶合金Zr55Cu30 Al1 0 Ni5在等温退火过程中的微结构变化进行研究 .实验表明 :在等温退火过程中电子密度涨落反映了晶化之前的结构弛豫过程 ;在一定的退火温度下、随退火时间的增加 ,拓扑短程序弛豫与化学短程序弛豫之间存在一个电子密度均匀化的过程 ;导致这两种弛豫过程转变的退火时间与退火温度有关 ,温度越高。

关键词：原位x射线小角散射块体非晶合金等温退火结构弛豫 Zr55Cu30Al10Ni5合金电子密度涨落

Study of proton resonances in ^(18)Ne via resonant elastic scattering of ^(17)F+p and its astrophysical implication

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Science china(Physics,Mechanics & Astronomy) 2011年第S1期54卷 32-36页

作者： HE JianJun1, HU Jun1,2, XU ShiWei1, CHEN ZhiQiang1, ZHANG XueYing1, WANG JianSong1, YU XiangQing1, ZHANG LiYong1,2, LI Long1,2, YANG YanYun1,2, MA Peng1,2, ZHANG XueHeng1, HU ZhengGuo1, GUO ZhongYan1, XU Xing1,2, YUAN XiaoHua1, LU Wan1,2, YU YuHong1, ZANG YongDong1,2, TANG ShuWen1,2, YE RuiPing1,2, CHEN JinDa1,2, JIN ShiLun1,2, DU ChengMing1,2, WANG ShiTao1,2, MA JunBing1,2, LIU LongXiang1,2, BAI Zhen1,2, LEI XiangGuo1, SUN ZhiYu1, ZHANG YuHu1, ZHOU XiaoHong1, XU HuShan1, SU Jun3, LI ErTao3, WANG HongWei4, TIAN WenDong4 & LI XiangQing5 1 institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, china 2 Graduate University of Chinese Academy of Sciences, beijing 100049, china 3 china institute of atomic energy (CIAE), beijing 102413, china 4 Shanghai institute of Applied Physics (SINAP), Chinese Academy of Sciences, Shanghai 201800, china 5 School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, beijing 100871, china institute of Modern Physics (IMP) Chinese Academy of Sciences Lanzhou China Graduate University of Chinese Academy of Sciences Beijing China china institute of atomic energy (CIAE) Beijing China Shanghai institute of Applied Physics (SINAP) Chinese Academy of Sciences Shanghai China School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China

The proton resonant properties in 18Ne, which determine the reaction rate of the key stellar 14O(α,p)17F reaction, have been studied by using a technique of proton resonant elastic scattering of 17F+p. A 4.22 MeV/nucleon 17F radioactive ion (RI) beam was produced via a projectile-fragmentation reaction, and separated by a Radioactive Ion Beam Line in Lanzhou (RIBLL). By bombarding a thick (CH2)n target, the energy spectra of the recoiled protons were measured by two ΔE-E silicon telescopes at the center-of-mass scattering angles of θc.m.≈175°±5°, θc.m.≈152°±8°, respectively. Several proton resonances in 18Ne were ob served clearly. A further R-matrix analysis of the experimental data is under way to determine the resonant parameters. The present work reports the preliminary results briefly.

关键词： resonant reaction reaction rate explosive burning accreting binary systems

Systematic study of spin assignment and the dynamic moment of inertia of the intruder band in the 111,113In

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Systematic study of spin assignment and the dynamic moment o...

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： Ma ke-yan~1 Lu Jing-bin~(1 1)) Yang Dong~1 Wang lie-lin~1 Wang hui-dong~1 Yang shen~1 Zhu li-hua~2 Wu xiao-guang~3 Li guang-sheng~3 1(Department of Physics,Jilin University,Changchun 130023,china) 2(School of Physics and Nuclear energy Engineering,Beihang University,beijing 100191,china) 3(china institute of atomic energy,beijing 102413,china)

Exciation energy systematic search has been used to help the spin assignment of theπh intruder band of the In.I=23/2 and I=15/2 are assigned to the lowest observed state of the decoupled band in *** dynamic monment of inertia and the frequency of the vh neutrons' alignment of the vh intruder band are compared in the neighboring *** on the results of cranked shell model calculation compared with the experimental data,alignment features of intruder bands in the N=62 and N=64 isotones are *** delay of the crossing frequency is possibly caused by the p-n interaction and the interaction becomes weaker with the increasing of the number of the protons,but stronger with the increasing of the number of the neutrons.

关键词： excitation energy dynamic moment of inertia intruder band p-n interaction

来源： cnki会议评论

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磷酸三异戊脂萃取苯酚的研究

上海大学学报（自然科学版） 2005年第1期11卷 67-70页

作者：程倩包伯荣吴明红叶国安张先业上海大学理学院上海200444 上海大学射线应用研究所上海201800 中国原子能科学研究院放射化学研究所北京102413

通过磷酸三异戊脂(TiAP)萃取苯酚的平衡常数的测定,发现磷酸三异戊脂对苯酚具有很高的萃取分配比,且分相很快;并探讨了盐析效应.采用双对数斜率法测得TiAP与苯酚的萃合物组成,考察了TiAP萃取苯酚的温度效应,根据Van'tHoff方程求出相关... 详细信息

通过磷酸三异戊脂(TiAP)萃取苯酚的平衡常数的测定,发现磷酸三异戊脂对苯酚具有很高的萃取分配比,且分相很快;并探讨了盐析效应.采用双对数斜率法测得TiAP与苯酚的萃合物组成,考察了TiAP萃取苯酚的温度效应,根据Van'tHoff方程求出相关的热力学函数,同时利用IR探讨了萃合物的结构.

关键词： TiAP 萃取苯酚