Three-Body Barrier Dynamics of Double-Alpha Decay in Heavy Nuclei
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866910017633910784 |
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| author | Tang, Shulin Wan, Tao Qian, Yibin Qi, Chong Wyss, Ramon A. Liotta, Roberto J. Bai, Dong Zhou, Bo Ren, Zhongzhou |
| author_facet | Tang, Shulin Wan, Tao Qian, Yibin Qi, Chong Wyss, Ramon A. Liotta, Roberto J. Bai, Dong Zhou, Bo Ren, Zhongzhou |
| contents | The simultaneous emission of two $α$ particles--double-$α$ decay--represents a long-predicted but unobserved mode of nuclear radioactivity. Here we formulate this process as a genuine three-body problem within the hyperspherical coordinate framework and evaluate decay probabilities by numerically solving the corresponding hyperradial Schrödinger equation, combined with large-scale random sampling of the potential parameters; the latter treatment ensures that the present results are more convincing. Inspired by this, we demonstrate that the penetrability ratio between simultaneous and sequential $α$ emission exhibits a strikingly linear dependence on $ZQ_{αα}^{-1/2}$, extending the barrier penetration dynamics into the correlated few-body regime. The nuclei $^{108}$Xe, $^{218}$Ra, $^{224}$Pu, $^{222}$U, $^{216}$Rn, and $^{220}$Th are suggested as the most promising candidates for the observation of double-$α$ decay, with predicted half-lives potentially accessible within present detection limits. Our results provide a unified framework for multi-$α$ decay and open a pathway to probing nuclear clustering and few-body correlations in heavy nuclei. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_09480 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Three-Body Barrier Dynamics of Double-Alpha Decay in Heavy Nuclei Tang, Shulin Wan, Tao Qian, Yibin Qi, Chong Wyss, Ramon A. Liotta, Roberto J. Bai, Dong Zhou, Bo Ren, Zhongzhou Nuclear Theory Solar and Stellar Astrophysics Nuclear Experiment The simultaneous emission of two $α$ particles--double-$α$ decay--represents a long-predicted but unobserved mode of nuclear radioactivity. Here we formulate this process as a genuine three-body problem within the hyperspherical coordinate framework and evaluate decay probabilities by numerically solving the corresponding hyperradial Schrödinger equation, combined with large-scale random sampling of the potential parameters; the latter treatment ensures that the present results are more convincing. Inspired by this, we demonstrate that the penetrability ratio between simultaneous and sequential $α$ emission exhibits a strikingly linear dependence on $ZQ_{αα}^{-1/2}$, extending the barrier penetration dynamics into the correlated few-body regime. The nuclei $^{108}$Xe, $^{218}$Ra, $^{224}$Pu, $^{222}$U, $^{216}$Rn, and $^{220}$Th are suggested as the most promising candidates for the observation of double-$α$ decay, with predicted half-lives potentially accessible within present detection limits. Our results provide a unified framework for multi-$α$ decay and open a pathway to probing nuclear clustering and few-body correlations in heavy nuclei. |
| title | Three-Body Barrier Dynamics of Double-Alpha Decay in Heavy Nuclei |
| topic | Nuclear Theory Solar and Stellar Astrophysics Nuclear Experiment |
| url | https://arxiv.org/abs/2602.09480 |