By adding repulsive nuclear potential, in Gaussian shape and double-folding form with different values of repulsive surface diffuseness parameter, to the attractive double-folding nuclear potential (M3Y) the effect of repulsive core on alpha decay half-lives and decay parameters of some even-even alpha emitters were analyzed. Calculations were accomplished using WKB approximation by considering Bohr-Sommerfeld quantization condition. The results showed calculated half-lives with M3Y lay between obtained lower and upper limits by M3Y plus repulsive potential with short-range repulsive diffuseness $a_{rep}=0.01\text{fm}$ and long-range one $a_{rep}=0.30\text{fm}$. As result of crucial role of quantization factor an increasing trend of half-lives were observed by increase of $a_{rep}$. Also good coincidence between theory and experiment was observed for a distinct $a_{rep}$ which highlights the formation of alpha particle near surface of parent nucleus.

通过将具有不同排斥表面扩散参数值的高斯形状和双重折叠形式的排斥核电势添加到有吸引力的双重折叠核电势（M3Y）中，排斥核对某些衰变半衰期和衰变参数的影响分析了偶数甚至是alpha的发射器。通过考虑Bohr-Sommerfeld量化条件，使用WKB逼近来完成计算。结果表明，M3Y的计算的半衰期介于所获得的上下限之间（通过M3Y加上具有短程排斥扩散的排斥电位）${\mathrm{一种}}_{\mathrm{[R}Ëp}=0.01\text{调频}$ 和远程的 ${\mathrm{一种}}_{\mathrm{[R}Ëp}=0.30\text{调频}$。由于量化因子的关键作用，随着半衰期的增加，半衰期增加。${\mathrm{一种}}_{\mathrm{[R}Ëp}$。在理论和实验之间也发现了很好的一致性，${\mathrm{一种}}_{\mathrm{[R}Ëp}$ 这突出了在亲核表面附近形成的α粒子。