α Decay Properties of Even-Even Nuclei296-308 120 Within the Two-Potential Approach*

In the present work, we predict the ? decay half-lives of unknown even-even nuclei(296?308)120 within the two-potential approach, whose ? decay energy Q(?) is calculated using WS3+ mass model. To reduce the deviations between the predictions and experimental data due to nuclear shell effect, the analytic formula of ? decay hindrance factor is introduced to the two-potential approach, whose parameters had been extracted from even-even nuclei in the region of 82 < Z ? 126 and 152 < N ? 184 in our previous work [Deng et al., Chin. Phys. C 42 (2018) 044102]. In addition, for comparing, we use a type of ? decay general formula Universal Decay Law (UDL) and a semi-empirical formula in the superheavy nucleus (SEMFLS) to calculate the half-lives of even-even nuclei(296?308)120. The results indicate that our predicted values and the calculated values of the above two empirical formulas are mutually confirmed. Meanwhile, we systematically study ? decay chains of(296?308)120 and predict the decay modes for superheavy nuclei to help to identify new superheavy isotopes.