Nonlocality Effect in the Alpha decay half-lives of superheavy nuclei with XGBRegressor
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866915917488717824 |
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| author | Hu, Jinyu Wu, Chen |
| author_facet | Hu, Jinyu Wu, Chen |
| contents | 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 $α$-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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_04187 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nonlocality Effect in the Alpha decay half-lives of superheavy nuclei with XGBRegressor Hu, Jinyu Wu, Chen Nuclear Theory 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 $α$-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. |
| title | Nonlocality Effect in the Alpha decay half-lives of superheavy nuclei with XGBRegressor |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2604.04187 |