Vol 88, No 5 (2025)

This work presents a new phenomenological approach for predicting the spontaneous fission half-lives of actinides and superheavy nuclei. A linear dependence between the decimal logarithm of the spontaneous fission half-life log10​T1/2SF​ and the energy release Qα​ of alpha decay is found for nuclei with fixed neutron excess $N-Z$ and atomic numbers in the range $90\le Z\le 102$. Based on this correlation, a semi-empirical formula is proposed for the spontaneous fission half-life of even–even nuclei as a function of Qα​ and $N-Z$. The proposed formula is further extended to predict half-lives for odd-A, odd–odd nuclei, and nuclei with $Z\ge 103$. The formula demonstrates good agreement with experimental data, reproducing the half-lives of 111 known nuclei with a mean deviation of 1.00 order of magnitude. Predictions of the new formula are compared with results obtained using other empirical formulas and microscopic–macroscopic and self-consistent microscopic models. An analysis of the influence of different mass tables on the accuracy of the predictions is performed. The possible fundamental relationship between spontaneous fission and alpha-decay process is discussed.