欢迎登录材料期刊网

材料期刊网

中国科学院金属研究所 科学出版社
高级检索
  1. 首页
  2. 期刊
  3. 原子核物理评论
  4. 基于RMF理论对超重核结构和合成以及滴线外核的研究

原子核物理评论 , 2003, 20(2): 137-147. doi: 10.3969/j.issn.1007-4627.2003.02.011

基于RMF理论对超重核结构和合成以及滴线外核的研究

孟杰 1, , 张炜 2, , 张焕乔 3,

1.兰州重离子加速器国家实验室原子核理论中心,甘肃,兰州,730000;北京大学物理学院,北京,100871;中国科学院理论物理研究所,北京,100080

2.北京大学物理学院,北京,100871

3.北京大学物理学院,北京,100871;中国原子能科学研究院,北京,102413

基金项目:   国家重点基础研究发展计划(973计划)(G2000077407)   国家自然科学基金(10025522,10047001,19935030)  

关键词： 超重元素 , 滴线外核 , 相对论平均场 , 冷熔合反应截面 , 壳效应

Structure and Synthesis for Superheavy Element Based on Relativistic Mean Field Theory and Research on Nuclide beyond Drip-line

总结和回顾了超重核结构和反应研究的历史和现状,利用形变约束的相对论平均场理论系统计算了实验观测到的Z=102-112号元素的能量随形变的变化,得到了这些核素的基态和鞍点性质,利用Strutinsky壳修正方法研究了壳效应对这些核素的影响.利用所得到的结构信息,计算了相应的冷熔合反应的截面,给出了与实验相仿的结果,得到Z=118号元素的合成截面为23pb,比宏观模型的结果小20倍.讨论了相关物理量对反应截面的影响.同时,还给出了相对论连续谱Hartree-Bogoliubov(RCHB)理论对滴线外核1800Sn的描述.

参考文献

[1] Myers W D, Swiatecki W J. Nuclear Mass and Deformations [J]. NuclPhys, 1966, A81: 1.
[2] Sobiczewski A, Gareev F A, Kalinkin B N. Closed Shells for Z ＞82 and N＞126 in a Diffuse Potential Well [J]. Phys Lett,1966, 22: 500.
[3] Meldner H. Predictions of New Magic Regions and Masses for Super-heavy Nuclei from Calculations with Realistic Shell Model Single Particle Hamiltonians[J]. Ark Fys 1967, 36: 593.
[4] Nilsson S G, Nix J R, Sobiczewski A, et al. On the Spontaneous Fisson of Nuclei with Z near 114 and N near 184[J]. Nucl Phys, 1968, A115: 545.
[5] Nilsson S G, Tsang C F, Sobiczewski A, et al. On the Nuclear Structure and Stability of Heavy and Superheavy Elements [J]. NuclPhys, 1969, A131: 1.
[6] Mosel U, Greiner W. On the Stability of Superheavy Nuclei Against Fisson[J]. Z Phys , 1969, 222: 261.
[7] Mollera P, Nix J R. Stability of Heavy and Superheavy Elements[J]. JPhys, 1994, G20:1681.
[8] Wu C L, Guidry M, Feng D H.Z=110-111 Elements and the Stability of Heavy and Superheavy Elements[J]. Phys Lett, 1996, B387: 449.
[9] Lalazissis G A, Sharma M M, Ring P, etal. Superheavy Nuclei in the Relativistic Mean-field Theory [J]. Nucl Phys,1996, A608: 202.
[10] Cwiok S, Dobaczewski J, Heenen P H, etal. Shell Structure of the Superheavy Elements[J]. Nucl Phys, 1996, A611:211.
[11] Rutz K, Bender M, Buervenich T, et al. Superheavy Nuclei in Self-consistent Nuclear Calculations [J]. Phys Rev, 1997,C56(1) : 238.
[12] Bender M, Rutz K, Reinhard P G, et al. Potential Energy Surfaces of Superheavy Nuclei [J]. Phys Rev, 1998, C58(4): 2126.
[13] Meng J. Relativistic Continuum Hartree-Bogoliubov Theory with Both Zero Range and Finite Range Gogny Force and Their Application[J]. Nucl Phys, 1998, A635: 3.
[14] Meng J, Takigawa N. Structure of Superheavy Elements Suggested in the Reaction of 86Kr with 208Pb[J]. Phys Rev,2000, C61: 064319.
[15] Long W, Meng J, Zhou S G. Structure of the New Nuclide 259Db and Its α-decay Daughter Nuclei[J]. Phys Rev, 2002,C65:047306;龙文辉,孟杰,周善贵.相对论平均场理论对新核素259Db及其α衰变链的研究[J].高能物理与核物理,2002, 26(8): 823.
[16] Oganessian Yu Ts. Classical and Quantum Mechanical Aspects of Heavy Ion Collisions[M]. Lecture Notes in Physics,Heidelberg: Springer, 1975, 33: 221.
[17] Oganessian Yu Ts. Classical and Quantum Mechanical Aspects of Heavy Ion Collisions[M]. Lecture Notes in Physics,Heidelberg: Springer, 1975, 33: 221.
[18] Münzenberg G, Hofmann S, Hessberger F P, et al. Identifications of Elements 107 by α Correlation Chains[J]. Z Phys,1981, A300: 107.
[19] Münzenberg G,Armbruster P, Hessberger F P, et al. Observation of One Correlated α -decay in the Reaction 58Fe on 209Bi→ 267109[J]. ZPhys, 1982, A309: 89.
[20] Münzenberg G, Armbruster P, Folger H , et al. The Identification of Element 108[J]. Z Phys, 1984, A317: 235.
[21] Hofmann S, Ninov V, Hessberger F P, et al. Production and Decay of 269110 [J]. ZPhys, 1995, A350: 277.
[22] Hofmann S, Ninov V, Hessberger F P, et al. The New Element 111 [J]. ZPhys, 1995, A350: 281.
[23] Hofmann S, Ninov V, Hessberger F P, et al. The New Element 112[J]. Z Phys, 1996, A354: 229.
[24] Ghiorso A, Lee D, Somerville L P, et al. Evidence for the Possible Synthesis of Element 110 Produced by the 59Co+209Bi Reaction[J]. Phys Rev, 1995, C51(5): R2 293.
[25] Lazarev Yu A, Lobanov Yu V, Oganessian Yu Ts, et al.Discovery of Enhanced Nuclear Stability near the Deformed Shells N=162 and Z=108[J]. Phys Rev Lett, 1994, 73:624.
[26] Lazarev Yu A, Lobanov Yu V, Oganessian Yu Ts, et al.New Nuclei 267 108 Produced by the 238 U+34 S Reaction[J].Phys Rev Lett, 1995, 75: 1903.
[27] Lazarev Yu A, Lobanov Yu V, Oganessian Yu Ts, et al.αDecay of 273110: Shell closure at N=162[J]. Phys Rev,1996, C54(2): 620.
[28] Oganessian Yu Ts, Utyonkov V K, Lobanov Yu V, et al.Synthesis of Superheavy Nuclei in the 48Ca+244 Pu Reaction [J]. PhysRevLett, 1999, 83(16): 3154.
[29] Gan Z G, Qin Z, Fan H M, et al. A New Alpha-particleemitting Isotope259Db[J]. EurPhysJ, 2001, A10:21.
[30] Hofmann S. Synthesis of Superheavy Elements Using Radioactive Beams and Targets[J]. Progress in Particle and Nuclear Physics, 2001, 46: 293.
[31] Bass R. Fusion of Heavy Nuclei in a Classical Model[J]. Nucl Phys, 1974, A231: 45.
[32] Oertzen W yon. Cold Multi-nucleon Transfer between Heavy Nuclei and the Synthesis of New Elements[J]. Z Phys, 1992,A342: 177.
[33] Hofmann S. New Elements-approaching Z=114 [J]. Rep Prog Phys, 1998, 61: 639.
[34] Adamian G G, Antonenko N V, Scheid W, et al. Fusion Cross Sections for Superheavy Nuclei in the Dinuclear System Concept[J]. Nucl Phys, 1998, A633: 409.
[35] Swiatecki W J. The Dynamics of Nuclear Coalescence or Reseparation[J]. Phys Scr, 1981, 24: 113.
[36] Swiatecki W J. The Dynamics of the Fusion of Two Nuclei [J]. Nucl Phys, 1982, A376: 275.
[37] Blocki J P, Feldmeier H, Swiatecki W J. Dynamical Hindrance to Compound-nucleus Formation in Heavy-ion Reactions[J]. Nucl Phys, 1986, A459: 145.
[38] Aritomo Y, Wada T, Ohta M, et al. Diffusion Mechanism for Synthesis of Superheavy Elements[J]. Phys Rev, 1997,C55(3): R1011.
[39] Aritomo Y, Wads T, Ohta M, et al. Fluctuation-dissipation Model for Synthesis of Superheavy Elements[J]. Phys Rev,1999, C59: 796.
[40] Smolanczuk R. Production Mechanism of Superheavy Nuclei in Cold fusion Reactions [J]. Phys Rev , 1999, C59:2634.
[41] Hofmann S, Münzenberg G. The Discovery of the Heaviest Elements[J]. Rev Mod Phys, 2000, 72(3): 733.
[42] Ring P, Schuck P. The Nuclear Many-body Problem[M].New York: Springer-Verlag, 1980, 1: 269.
[43] Gambhir Y K, Ring P, Thimet A. Relativistic Mean Field Theory for Finite Nuclei[J]. Ann Phys, 1990, 198: 132.
[44] Strutinsky M V. Shell Effects in Nuclear Masses and Deformation Energies[J]. Nucl Phys, 1967, A95: 420; Strutinsky V M. "Shells" in Deformed Nuclei[J]. Nucl Phys, 1968,A122: 1.
[45] 曾谨言.量子力学[M].北京:科学出版社,2000,第三版,卷Ⅱ,105.
[46] Hasse R W, Myers W D. Characterization of Leptodermous Distributions[M]. Geometrical Relationships of Macroscopic Nuclear Physics, 1988: 22.
[47] Nerlo-Pomorska B, Pomorski K. Simple Formula for Nuclear Charge Radius[J]. Z Phys, 1994, A348: 169.
[48] Zhang S Q, Meng J, Zhou S G, et al. Isospin and Z1/3-de-pendence of the Nuclear Charge Radii[J]. Eur Phys J, 2002,A13: 285.
[49] 卢希庭.原子核物理[M].北京:原子能出版社,1981,237.
[50] Audi G, Bersillon O, Blachot J , et al. The NUBASE Evaluation of Nuclear and Decay Properties[J]. Nucl Phys, 1997,A624: 1.
[51] Meng J, Ring P. Giant Halo at the Neutron Drip Line[J].Phys Rev Lett, 1998, 80: 460; Meng J, Tanihata I, Yamaji S. The Proton and Neutron Distributions in Na Isotopes: The development of halo and shell structure[J]. Phys Lett, 1998,B419: 1; Meng J, Toki H, Zeng J Y, etal. Giant Halo at the Neutron Drip Line in Ca Isotopes in Relativistic Continuum Hartree-Bogliubov Theory[J]. Phys Rev, 2002, C65:R041302-1.
[52] Meng J, Ring P. Giant Halo at the Neutron Drip Line[J].Phys Rev Lett, 1998, 80: 460; Meng J, Tanihata I, Yamaji S. The Proton and Neutron Distributions in Na Isotopes: The development of halo and shell structure[J]. Phys Lett, 1998,B419: 1; Meng J, Toki H, Zeng J Y, etal. Giant Halo at the Neutron Drip Line in Ca Isotopes in Relativistic Continuum Hartree-Bogliubov Theory[J]. Phys Rev, 2002, C65:R041302-1.
[53] Meng J, Ring P. Giant Halo at the Neutron Drip Line[J].Phys Rev Lett, 1998, 80: 460; Meng J, Tanihata I, Yamaji S. The Proton and Neutron Distributions in Na Isotopes: The development of halo and shell structure[J]. Phys Lett, 1998,B419: 1; Meng J, Toki H, Zeng J Y, etal. Giant Halo at the Neutron Drip Line in Ca Isotopes in Relativistic Continuum Hartree-Bogliubov Theory[J]. Phys Rev, 2002, C65:R041302-1.
[54] Meng J, Ring P. Giant Halo at the Neutron Drip Line[J].Phys Rev Lett, 1998, 80: 460; Meng J, Tanihata I, Yamaji S. The Proton and Neutron Distributions in Na Isotopes: The development of halo and shell structure[J]. Phys Lett, 1998,B419: 1; Meng J, Toki H, Zeng J Y, etal. Giant Halo at the Neutron Drip Line in Ca Isotopes in Relativistic Continuum Hartree-Bogliubov Theory[J]. Phys Rev, 2002, C65:R041302-1.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
作者相关
文章评分
  • 您的评分：
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%

版权所有©2010中国科学院金属研究所中国科技出版传媒股份有限公司

本系统由北京仁和汇智信息技术有限公司设计开发

技术支持：info@rhhz.net