Entrance Channel Effect on the Formation of Heavy and Superheavy Nuclei (Nuclear Physics)

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概要

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• We study the effect of the entrance channel and the shell structure of reacting massive nuclei on the fusion mechanism and the formation of evaporation residues of heavy and superheavy nuclei. In the framework of the combined dinuclear system concept and advanced statistical model, we analyze the <40>^Ar + <176>^Hf, <86>^Kr + <130>^Xe and <124>^Sn + <92>^Zr reactions leading to <216>^Th^*; the <32>^S + <182>^W, <48>^Ti + <166>^Er, and <60>^Ni + <154>^Sm reactions leading to <214>^Th*; the <40>^Ar + <181>^Ta reaction leading to <221>^Pa*; the <48>^Ca + <248>^Cm reaction leading to the <296>^116 compound nucleus. In our calculations of the excitation functions for capture, fusion and evaporation residues we use the relevant variables such as mass-asymmetry of nuclei in the entrance channel, relative distance between nuclear centers, shell effect and shape of colliding nuclei and such characteristics of the reaction mechanism as potential energy surface, driving potential, the dependence of capture, fusion cross sections and survival probability of compound nucleus on the orbital angular momentum. As a result we obtain a beam energy range for the capture of the nuclei before the system fuses and the Γ_n/Γ_f ratio at each step along the de-excitation cascade of the compound nucleus. Calculations allow us to reach useful conclusions about the mechanism of the fusion-fission process, that is in competition with the quasifission process, and the production of the evaporatio residues.

• 社団法人日本物理学会の論文
• 2003-10-15

著者

• Ruggeri Roberto

  Infn Sezione Di Catania And Dipartimento Di Fisica Dell'universita Di Messina

• Nasirov Avazbek

  Department Of Heavy Ion Physics Institute Of Nuclear Physics:joint Institute For Nuclear Research

• FAZIO Giovanni

  INFN, Sezione di Catania, and Dipartimento di Fisica dell'Universita di Messina

• GIARDINA Giorgio

  INFN, Sezione di Catania, and Dipartimento di Fisica dell'Universita di Messina

• LAMBERTO Antonino

  INFN, Sezione di Catania, and Dipartimento di Fisica dell'Universita di Messina

• RUGGERI Roberto

  INFN, Sezione di Catania, and Dipartimento di Fisica dell'Universita di Messina

• SACCA Carmelo

  Dipartimento di Scienze della Terra dell'Universita di Messina

• PALAMARA Rocco

  Dipartimento PAU dell'Universita di Reggio Calabria

• MUMINOV Akhtam

  Heavy Ion Physics Department, INP

• NASIROV Avazbek

  Heavy Ion Physics Department, INP

• YAKHSHIEV Ulughbek

  Heavy Ion Physics Department, INP

• HANAPPE Francis

  Universite Libre de Bruxelles

• MATERNA Thomas

  Universite Libre de Bruxelles

• STUTTGE Louise

  Institut de Recherches Subatomiques

• Palamara Rocco

  Dipartimento Pau Dell'universita Di Reggio Calabria

• Giardina Giorgio

  Infn Sezione Di Catania:dipartimento Di Fisica Dell'universita Di Messina

• Giardina G

  Dipartimento Di Fisica Dell'universitii

• Sacca Carmelo

  Dipartimento Di Scienze Della Terra Dell'universita Di Messina

• Muminov Akhtam

  Department Of Heavy Ion Physics Institute Of Nuclear Physics

• Fazio Giovanni

  Infn Sezione Di Catania:dipartimento Di Fisica Dell'universita Di Messina

• Hanappe F

  Universite Libre De Bruxelles

• Fazio G

  Infn Sezione Di Catania:dipartimento Di Fisica Dell'universita Di Messina

• Stuttge L

  Inst. Recherches Subatomiques Strasbourg Fra

• Lamberto Antonino

  Infn Sezione Di Catania And Dipartimento Di Fisica Dell'universita Di Messina

• Yakhshiev Ulughbek

  Heavy Ion Physics Department Inp

• Fazio Giovanni

  INFN, Sezione di Catania:Dipartimento di Fisica dell'Universita di Messina

• RUGGERI Roberto

  INFN, Sezione di Catania, and Dipartimento di Fisica dell'Universita di Messina

• Giardina Giorgio

  INFN, Sezione di Catania:Dipartimento di Fisica dell'Universita di Messina

• Lamberto Antonino

  INFN, Sezione di Catania, and Dipartimento di Fisica dell'Universita di Messina

• NASIROV Avazbek

  Department of Heavy Ion Physics, Institute of Nuclear Physics:Joint Institute for Nuclear Research

• MUMINOV Akhtam

  Department of Heavy Ion Physics, Institute of Nuclear Physics

関連論文

• Entrance Channel Effect on the Formation of Heavy and Superheavy Nuclei (Nuclear Physics)
• Entrance Channel Effect on the Formation of Heavy and Superheavy Nuclei
• Problems of Dynamical Calculation for Synthesis of Superheavy Elements
• Effect of the Entrance Channel on the Fission of the Compound Nucleus(Nuclear Physics)
• Experimental Evidence of Shell Effects in the Fission Time of Heavy Nuclei : Nuclei
• The (α, ^6Li) Reaction Mechanism at E_α=27.2 MeV
• The P_ ^5He Level
• On the Broad First Excited ^5He State
• Role of the Target Orientation Angle and Orbital Angular Momentum in the Evaporation Residue Production(Nuclear physics)
• Angular Distribution of the Fission Fragments as a Probe for the Shell Effects
• Angular Distribution of the Fission Fragments as a Probe for the Shell Effects
• The Even-Spin Positive-Parity ^8Be Levels in the 20 MeV Region Observed by the ^7Li (d,αα)n Reaction
• The 5.65 MeV ^6Li Level Width by the ^7Li(^3He,αd)α Reaction at E(^3He)=11.5 MeV
• Role of the Target Orientation Angle and Orbital Angular Momentum in the Evaporation Residue Production

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