2025/12/25 by Yi Xie, Ning Wang, Xie, Yi +3
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Neutrino Physics Research #Nuclear Theory (nucl-th) #Nuclear physics research studies
paper · doi:10.48550/arxiv.2512.21453
openalex publication_date 2025/12/25 · openalex created_date 2025/12/30 · openalex updated_date 2026/07/28
A phenomenological model is proposed for a systematic description of the spontaneous fission (SF) half-lives T\rm SF of heavy and super-heavy nuclei. Based on the effective tunneling barrier (ETB), the proposed approach reproduces the SF half-lives of 79 known nuclei with an average deviation of 0.8, which is 17% smaller than that of the linear correlation approach recently proposed in [N. S. Moiseev, N. V. Antonenko and G. G. Adamian, Phys. Rev. C 112, 034607 (2025)]. For superheavy nuclei with 45\leqslant N-Z \leqslant 61, the predicted SF half-lives from these two different phenomenological models are in good agreement with each other. The ETB calculations implies that the β-decay energy affects the SF half-lives of nuclei far from the β-stability line. For superheavy nuclei around the magic number N=184, the predicted T\rm SF of 304120 is much shorter than that of 298Fl. With predicted values of about 10 ∼ 160 ms for T\rm SF, the unmeasured SHN 293119 could survive for long enough to reach the focal-plane detector in detection systems like the gas-filled recoil separator SHANS in Lanzhou.