α Decay Properties of Even-Even Nuclei296–308120 Within the Two-Potential Approach**Supported by National Natural Science Foundation of China under Grant Nos. 11205083 and 11505100, the construct program of the key discipline in Hunan province, the Research Foundation of Education Bureau of Hunan Province, China under Grant Nos. 15A159 and 18A237, the Natural Science Foundation of Hunan Province, China under Grant Nos.

Abstract

In the present work, we predict the α decay half-lives of unknown even-even nuclei296–308120 within the two-potential approach, whose α decay energy Qα 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 α 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 α 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 nuclei296–308120. The results indicate that our predicted values and the calculated values of the above two empirical formulas are mutually confirmed. Meanwhile, we systematically study α decay chains of296–308120 and predict the decay modes for superheavy nuclei to help to identify new superheavy isotopes.