In present work, we have calculated the hindrance factors of 182 even-even alpha emitters using Preston’s formulation of alpha decay probabilities and presented HFs systematics of 1^- and 3^- states in reflection asymmetric even-even quadruple-octupole deformed nuclides (A~216-230). The calculated HFs of both 1^- and 3^- states decrease with reduction in neutron number and this decrease is attributed to onset of intrinsic reflection asymmetry. There is a trend reversal for 1^- states at N=132 (²¹⁸Ra) and N=134 (²²⁰Rn), which might be a possible indication of departure from static octupole deformation. Similarly, HFs systematics is discussed for ^224-230Th and ^232-236U isotopic chains along with 2⁺ states observed in daughter nuclei in N=132-146 isotonic chains.

中文翻译：

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双偶核中α衰变阻碍因子的系统学

在本工作中，我们已经计算出使用α衰变概率的普雷斯顿的制剂的182偶偶α发射体的阻因素和呈现的1中空纤维系统学^-和3 ^-在反射非对称状态偶-偶四倍八极形变核素（A〜216 -230）。两个1所述的计算出的hfc ^-和3 ^-状态降低与减少中子数和这种降低归因于本征反射不对称发作。有一种趋势反转为1 ^-在N = 132的状态（²¹⁸ Ra）和N = 134（²²⁰ Rn）中，这可能是从静态八极形变离开的可能的指示。同样地，HFs系统学讨论了在N = 132-146等渗链的子核中观察到^224-230 Th和^232-236 U同位素链以及2 ⁺状态。