Revisiting p-$^{11}$B Fusion: Updated Cross-sections, Reactivity, and Energy Balance
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917179866218496 |
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| author | Wang, Hong-Yi Li, Yu-Qi Wu, Qian Cui, Zhu-Fang |
| author_facet | Wang, Hong-Yi Li, Yu-Qi Wu, Qian Cui, Zhu-Fang |
| contents | Recent experimental progress has substantially improved the available cross-section data for the p-$^{11}$B fusion reaction, particularly in energy regions that previously lacked direct measurements. In this study, we develop a high-precision analytical parameterization of the p-$^{11}$B reaction cross-section over the 0--10 MeV energy range, incorporating the new experimental data into a continuous and numerically efficient representation. Using this parameterization, we evaluate the thermonuclear reactivity of the p-$^{11}$B reaction and examine the effects of the dominant resonance at 0.6 MeV and a newly observed resonance around 4.7 MeV. Furthermore, we assess the energy balance by analyzing the fusion power density and the electron bremsstrahlung power density. Our results indicate that p-$^{11}$B fusion is not precluded by bremsstrahlung constraints when contemporary cross-section data and self-consistent thermal modeling are employed. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2601_00241 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Revisiting p-$^{11}$B Fusion: Updated Cross-sections, Reactivity, and Energy Balance Wang, Hong-Yi Li, Yu-Qi Wu, Qian Cui, Zhu-Fang Nuclear Theory High Energy Astrophysical Phenomena Nuclear Experiment Plasma Physics Recent experimental progress has substantially improved the available cross-section data for the p-$^{11}$B fusion reaction, particularly in energy regions that previously lacked direct measurements. In this study, we develop a high-precision analytical parameterization of the p-$^{11}$B reaction cross-section over the 0--10 MeV energy range, incorporating the new experimental data into a continuous and numerically efficient representation. Using this parameterization, we evaluate the thermonuclear reactivity of the p-$^{11}$B reaction and examine the effects of the dominant resonance at 0.6 MeV and a newly observed resonance around 4.7 MeV. Furthermore, we assess the energy balance by analyzing the fusion power density and the electron bremsstrahlung power density. Our results indicate that p-$^{11}$B fusion is not precluded by bremsstrahlung constraints when contemporary cross-section data and self-consistent thermal modeling are employed. |
| title | Revisiting p-$^{11}$B Fusion: Updated Cross-sections, Reactivity, and Energy Balance |
| topic | Nuclear Theory High Energy Astrophysical Phenomena Nuclear Experiment Plasma Physics |
| url | https://arxiv.org/abs/2601.00241 |