分类: 物理学 >> 核物理学 提交时间: 2025-05-30
摘要: In the synthesis of new superheavy nuclei, the various long half-lives of Pu and Cm isotopes render them promising as target materials for the fusion reactions. An investigation into the isotopic dependence of the actinide targets is important to select optimal reaction systems. Based on the dinuclear system model with double-folding potential, the impact of the target isotope is investigated for the reactions $^{48}$Ca+$^{239,240,242,244}$Pu. The reaction systems with the $^{242-248}$Cm targets and the $^{45}$Sc, $^{50}$Ti, $^{51}$V, $^{54}$Cr, $^{55}$Mn projectiles are investigated for the synthesis of new isotopes $^{284-290}$Ts, $^{289-293,295}$Og, $^{290-296}$119, $^{293-299}$120, $^{294-300}$121. The isotopic dependence of the Cm targets reveals an ascending trend of the maximal ER cross section coupled with an odd-even effect as the neutron number of the target increases, and the $^{247}$Cm target emerges promising in future experiments. The optimal reactions for producing new superheavy elements with $Z$ = 119-121 are predicted to be the reactions $^{51}$V+$^{245}$Cm, $^{54}$Cr+$^{247}$Cm and $^{55}$Mn+$^{247}$Cm with the maximal ER cross sections of 144 fb, 0.877 fb and 0.052 fb, respectively.
分类: 物理学 >> 核物理学 提交时间: 2025-04-03
摘要: In the synthesis of new superheavy nuclei, the various long half-lives of Pu and Cm isotopes render them promising as target materials for the fusion reactions. An investigation into the isotopic dependence of the actinide targets is important to select optimal reaction systems. Based on the dinuclear system model with double-folding potential, the impact of the target isotope is investigated for the reactions $^{48}$Ca+$^{239,240,242,244}$Pu. The reaction systems with the $^{242-248}$Cm targets and the $^{45}$Sc, $^{50}$Ti, $^{51}$V, $^{54}$Cr, $^{55}$Mn projectiles are investigated for the synthesis of new isotopes $^{284-290}$Ts, $^{289-293,295}$Og, $^{290-296}$119, $^{293-299}$120, $^{294-300}$121. The isotopic dependence of the Cm targets reveals an ascending trend of the maximal ER cross section coupled with an odd-even effect as the neutron number of the target increases, and the $^{247}$Cm target emerges promising in future experiments. The optimal reactions for producing new superheavy elements with $Z$ = 119-121 are predicted to be the reactions $^{51}$V+$^{245}$Cm, $^{54}$Cr+$^{247}$Cm and $^{55}$Mn+$^{247}$Cm with the maximal ER cross sections of 144 fb, 0.877 fb and 0.052 fb, respectively.
分类: 物理学 >> 核物理学 提交时间: 2024-12-11
摘要: In the synthesis of new superheavy nuclei, the various long half-lives of Pu and Cm isotopes render them promising as target materials for the fusion reactions. An investigation into the isotopic depen dence of the actinide targets is important to select optimal reaction systems. Based on the dinuclear system model, the influential factors on the isotopic dependence are investigated for the reactions 48Ca+239,240,242,244Pu. The reaction systems with the 242−248Cm targets and the 45Sc, 50Ti, 51V, 54Cr, 55Mn projectiles are investigated for the synthesis of new isotopes 284−290Ts, 289−293,295Og, 290−296119, 293−299120, 294−300121. The isotopic dependence of the Cm targets reveals an ascending trend of the maximal ER cross section coupled with an odd-even effect as the neutron number of the target increases, and the 247Cm target emerges promising in future experiments. The optimal reactions for producing new superheavy elements with Z = 119-121 are predicted to be the reactions 51V+245Cm, 54Cr+247Cm and 55Mn+247Cm with the maximal ER cross sections of 144 fb, 0.877 fb and 0.052 fb, respectively