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    Production probability of superheavy nuclei in fusion

    Ning Wang*, Cheng Li, and Hong Yao

    • Department of Physics, Guangxi Normal University, Guilin 541004, People's Republic of China and Guangxi Key Laboratory of Nuclear Physics and Technology, Guilin 541004, People's Republic of China

    • *Contact author: wangning@gxnu.edu.cn

    Phys. Rev. C 114, 034616 – Published 15 September, 2026

    DOI: https://doi.org/10.1103/dyj6-2dfw

    Abstract

    The synthesis of superheavy nuclei (SHN) through fusion reactions is a critical area of nuclear physics, offering insights into nuclear stability and the limits of the periodic table. However, theoretical predictions of evaporation residue cross sections σER remain challenging due to large uncertainties arising from complex reaction mechanisms and sensitive model parameters. In this work, the average production probabilities of SHN with atomic number Z≥110 are systematically analyzed, based on the barrier tunneling concept. Together with the empirical barrier distribution method for describing capture, a phenomenological formula, EBD3, is proposed, which reproduces 58 measured σER within one order of magnitude, with a root-mean-square deviation of 0.369. The formula successfully captures key quantities in the fissionlike process, including fission barrier height, mass asymmetry, depth of the capture pocket, and the effective fusion barrier height. Predictions for the synthesis of element 119 are presented, identifying promising projectile-target combinations such as Ti50+Bk249 with a maximum cross section of 54.9−29.0+61.3 fb at the excitation energy of 36.5 MeV. The maximum cross section falls to 3.2−1.7+3.6 fb for Cr54+Am243 at the optimal incident energy of 244 MeV.

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