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arXiv · 2604.04187

Nonlocality Effect in the Alpha decay half-lives of superheavy nuclei with XGBRegressor

Jinyu Hu·Chen Wu
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Abstract

Building on the work of E. L. Medeiros [1] and our previous study [2], we generalize the alpha-nucleus nonlocality effect to odd-A and odd-odd nuclei within the two-potential approach (TPA) framework. The coordinate-dependent parameters introduced by this nonlocality are optimized using an advanced gradient boosting regression model. This improved TPA is applied to calculate the $\alpha$-decay half-lives of 599 nuclei with $Z = 52-118$, yielding a root-mean-square (RMS) deviation that is 74.8$\%$ lower than that of the original TPA. Subsequently, we employ the improved TPA, along with the DZR [3] and MUDL [4]models, to predict alpha-decay half-lives for 142 superheavy nuclei with $Z = 117-120$. The predictions from all three models are in close agreement, with the results from our improved TPA and the DZR model being nearly identical.

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Jinyu Hu, Chen Wu. 2026-04-05. Nonlocality Effect in the Alpha decay half-lives of superheavy nuclei with XGBRegressor. https://arxiv.org/abs/2604.04187

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