Non-negligible influence of shape inheritance and staggering on α decay
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866916676031741952 |
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| author | Li, Ruixiong Xiao, Jingyu Zhang, Hongfei Ma, Nana |
| author_facet | Li, Ruixiong Xiao, Jingyu Zhang, Hongfei Ma, Nana |
| contents | A series of findings in machine learning (ML) and decay theory are captured while exploring the role of deformation and preformation factors in α decay. We provide a novel and practical paradigm for developing physics-driven machine learning in nuclear physics research by introducing known decay theory and statistical correlation analysis. Furthermore, this analysis verifies the Geiger-Nuttall law, and the relationship between the decay energy and α formation amplitude, also releases a signal that nuclei with hexadecapole deformation are more likely to form α clusters. In particular, we identify two novel phenomena, shape inheritance, in which the deformation properties are partially transmitted from parent to daughter nuclei; and half-life inversion due to shape staggering of adjacent even-even nuclei. This phenomenon occurs frequently in neutron-deficient nuclei near lead isotopes, which is consistent with shape coexistence in experiments. Surprisingly, it reappeared within the predicted half-life of the 119 and 120 isotope chains in the eighth period of the periodic table. The half-life considering the inversion effect is preferable for the study of new nuclides and shape coexistence in experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_04449 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Non-negligible influence of shape inheritance and staggering on α decay Li, Ruixiong Xiao, Jingyu Zhang, Hongfei Ma, Nana Nuclear Theory A series of findings in machine learning (ML) and decay theory are captured while exploring the role of deformation and preformation factors in α decay. We provide a novel and practical paradigm for developing physics-driven machine learning in nuclear physics research by introducing known decay theory and statistical correlation analysis. Furthermore, this analysis verifies the Geiger-Nuttall law, and the relationship between the decay energy and α formation amplitude, also releases a signal that nuclei with hexadecapole deformation are more likely to form α clusters. In particular, we identify two novel phenomena, shape inheritance, in which the deformation properties are partially transmitted from parent to daughter nuclei; and half-life inversion due to shape staggering of adjacent even-even nuclei. This phenomenon occurs frequently in neutron-deficient nuclei near lead isotopes, which is consistent with shape coexistence in experiments. Surprisingly, it reappeared within the predicted half-life of the 119 and 120 isotope chains in the eighth period of the periodic table. The half-life considering the inversion effect is preferable for the study of new nuclides and shape coexistence in experiments. |
| title | Non-negligible influence of shape inheritance and staggering on α decay |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2504.04449 |