Production Cross Section of Superheavy Nuclei in Cold Fusion Reactions Based on the Relativistic Mean Field Theory

ZHANG Wei; MENG Jie; ZHANG Shuang-Quan

Chinese Physics C> 2004, Vol. 28> Issue(1) : 61-68

Production Cross Section of Superheavy Nuclei in Cold Fusion Reactions Based on the Relativistic Mean Field Theory

School of Physics,Peking University,Beijing 100871,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China3 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,China4 Key Laboratory of Heavy Ion Physics,Ministry of Education,Beijing 100871,China

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Abstract：
Based on the constrained relativistic mean field (RMF) theory,the potential surfaces of superheavy nuclei from Z=102 to Z=118 are calculated, and the properties of these nuclei are extracted, including binding energy and quadruple deformation of the equilibrium and saddle point, neutron separation energy and the height of the static fission barrier, etc. With the single particle levels obtained from the constrained RMF theory, the shell correction energy, the pairing correction energy and the microscopic energy are obtained by means of Strutinsky shell correction and BCS pairing correction approaches. Production cross sections of superheavy nuclei in cold fusion reactions are estimated by a simple phenomenological model with the above structure information. Using the properties of the compound nucleus and evaporation residue provided by the constrained RMF with TM1 parameters, satisfactory agreement has been obtained with the avaliable experimental production cross sections in cold fusion reactions. The prediction for the production cross section of the nucleus ²⁹³118 is two order smaller than the earlier prediction and much more close to the experimental observation. Similar conclusion can also be drawn for ²⁹³116.

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[1]

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ZHANG Wei, MENG Jie and ZHANG Shuang-Quan. Production Cross Section of Superheavy Nuclei in Cold Fusion Reactions Based on the Relativistic Mean Field Theory[J]. Chinese Physics C, 2004, 28(1): 61-68.

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Received: 2003-05-23
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Production Cross Section of Superheavy Nuclei in Cold Fusion Reactions Based on the Relativistic Mean Field Theory

Corresponding author: MENG Jie,

School of Physics,Peking University,Beijing 100871,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China3 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,China4 Key Laboratory of Heavy Ion Physics,Ministry of Education,Beijing 100871,China

Received Date: 2003-05-23

Accepted Date: 1900-01-01

Available Online: 2004-01-05

Abstract: Based on the constrained relativistic mean field (RMF) theory,the potential surfaces of superheavy nuclei from Z=102 to Z=118 are calculated, and the properties of these nuclei are extracted, including binding energy and quadruple deformation of the equilibrium and saddle point, neutron separation energy and the height of the static fission barrier, etc. With the single particle levels obtained from the constrained RMF theory, the shell correction energy, the pairing correction energy and the microscopic energy are obtained by means of Strutinsky shell correction and BCS pairing correction approaches. Production cross sections of superheavy nuclei in cold fusion reactions are estimated by a simple phenomenological model with the above structure information. Using the properties of the compound nucleus and evaporation residue provided by the constrained RMF with TM1 parameters, satisfactory agreement has been obtained with the avaliable experimental production cross sections in cold fusion reactions. The prediction for the production cross section of the nucleus ²⁹³118 is two order smaller than the earlier prediction and much more close to the experimental observation. Similar conclusion can also be drawn for ²⁹³116.

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Production Cross Section of Superheavy Nuclei in Cold Fusion Reactions Based on the Relativistic Mean Field Theory

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