| 基于熔合蒸发反应的超重新元素 Z = 119, 120的产生截面 |
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| 作者姓名： | Zihan WANG Penghui CHEN Xianghua ZENG Zhaoqing FENG |
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| 作者单位： | 1.扬州大学物理与科学技术学院，江苏 扬州 255009 |
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| 摘 要： |
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| 关 键 词： | 超重新元素 合成截面 入射道效应 双核模型 |
| 收稿时间： | 2022-10-29 |
Production Cross-sections of New Superheavy Elements with Z = 119, 120 in Fusion-evaporation Reactions |
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| Zihan WANG,Penghui CHEN,Xianghua ZENG,Zhaoqing FENG.Production Cross-sections of New Superheavy Elements with Z = 119, 120 in Fusion-evaporation Reactions[J].Nuclear Physics Review,2022,39(4):421-433. |
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| Authors: | Zihan WANG Penghui CHEN Xianghua ZENG Zhaoqing FENG |
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| Institution: | 1.College of Physical Science and Technology, Yangzhou University, Yangzhou 225009, Jiangsu, China2.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China3.College of Electrical, Power and Energy Engineering, Yangzhou University, Yangzhou 225009, Jiangsu, China4.School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, China |
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| Abstract: | We have calculated production cross sections of new superheavy elements with atomic number Z=119, 120 in the fusion-evaporation reactions of $^{48}{\rm{Ca}}$+$^{252}{\rm{Es}}$, $^{48}{\rm{Ca}}$+$^{257}{\rm{Fm}}$, $^{49}{\rm{Sc}}$+$^{252}{\rm{Es}}$, $^{49}{\rm{Sc}}$+$^{251}{\rm{Cf}}$, $^{50}{\rm{Ti}}$+$^{247}{\rm{Bk}}$, $^{50}{\rm{Ti}}$+$^{251}{\rm{Cf}}$, $^{51}{\rm{V}}$+$^{247}{\rm{Cm}}$, $^{51}{\rm{V}}$+$^{247}{\rm{Cf}}$, $^{54}{\rm{Cr}}$+$^{243}{\rm{Am}}$, $^{54}{\rm{Cr}}$+$^{247}{\rm{Cm}}$, $^{56}{\rm{Mn}}$+$^{244}{\rm{Pu}}$, $^{56}{\rm{Mn}}$+$^{243}{\rm{Am}}$, $^{60}{\rm{Fe}}$+$^{237}{\rm{Np}}$, $^{60}{\rm{Fe}}$+$^{244}{\rm{Pu}}$, $^{61}{\rm{Co}}$+$^{238}{\rm{U}}$, $^{61}{\rm{Co}}$+$^{237}{\rm{Np}}$, $^{64}{\rm{Ni}}$+$^{231}{\rm{Pa}}$, $^{64}{\rm{Ni}}$+$^{238}{\rm{U}}$, $^{65}{\rm{Cu}}$+$^{232}{\rm{Th}}$, $^{65}{\rm{Cu}}$+$^{231}{\rm{Pa}}$, and $^{68}{\rm{Zn}}$+$^{232}{\rm{Th}}$within the dinuclear system model systematically. The inner fusion barriers have been extracted from the driving potential and potential energy surface which could be used to predict the relative fusion probability roughly. The influence of mass asymmetry of the colliding partners on the production of new superheavy elements(SHE) has been investigated systematically. It is found that fusion probability increases along with the increasing mass asymmetry of colliding systems. The 46-50Ti-induced reactions prefer to produce new SHE with Z=119~120. The dependence of production cross-sections of new superheavy elements on the isospin of projectile nuclei has been discussed. The new SHE of $^{289-293}{\rm{119}}$ has been predicted as the synthesis cross sections around one picobarn in the $^{44,\, 46,\, 48,\, 50}{\rm{Ti}}$-induced reactions. Production cross-section of the element$^{295}{\rm{120}}$ has been evaluated as large as one picobarn in the reactions $^{46}{\rm{Ti}}$($^{251}{\rm{Cf}}$, 2n) $^{295}{\rm{120}}$ at $E^*$ = 26 MeV. The optimal projectile-target combinations and beam energies for producing new SHE with atomic number Z = 119~120 are proposed for the forthcoming experiments. |
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