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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.14145 |
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| _version_ | 1866909965194625024 |
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| author | Zhang, Min Luo, Yudong Dohi, Akira Xu, Xing Yan, Xinliang Kajino, Toshitaka Zhang, Yuhu Wang, Meng |
| author_facet | Zhang, Min Luo, Yudong Dohi, Akira Xu, Xing Yan, Xinliang Kajino, Toshitaka Zhang, Yuhu Wang, Meng |
| contents | The recent mass measurement of $^{70}$Kr using the $Bρ$-defined isochronous mass spectrometry yields a mass excess of $-41320(140)$ keV, indicating a 220-keV increase in binding energy compared to the AME2020 prediction. We utilize this experimental mass -- the last piece of information needed -- to model the potential waiting point $^{68}$Se in $rp$-process and quantitatively constrain the sequential $p$-capture reaction flow bypassing this waiting point. Our investigation shows that the more tightly bound nature of $^{70}$Kr enhances this reaction flow up to a factor of four. This enhancement reduces the effective half-life of $^{68}$Se. {A} one-zone X-ray burst model calculations reveal that the higher flow of $^{70}$Kr has distinct effects on the tail structure of light curve and the final SnSbTe abundances in the ashes due to a stronger $rp$-process heating. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_14145 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Impact of experimental mass of $^{70}$Kr on the $^{68}$Se waiting-point in $rp$-process Zhang, Min Luo, Yudong Dohi, Akira Xu, Xing Yan, Xinliang Kajino, Toshitaka Zhang, Yuhu Wang, Meng Nuclear Theory Nuclear Experiment The recent mass measurement of $^{70}$Kr using the $Bρ$-defined isochronous mass spectrometry yields a mass excess of $-41320(140)$ keV, indicating a 220-keV increase in binding energy compared to the AME2020 prediction. We utilize this experimental mass -- the last piece of information needed -- to model the potential waiting point $^{68}$Se in $rp$-process and quantitatively constrain the sequential $p$-capture reaction flow bypassing this waiting point. Our investigation shows that the more tightly bound nature of $^{70}$Kr enhances this reaction flow up to a factor of four. This enhancement reduces the effective half-life of $^{68}$Se. {A} one-zone X-ray burst model calculations reveal that the higher flow of $^{70}$Kr has distinct effects on the tail structure of light curve and the final SnSbTe abundances in the ashes due to a stronger $rp$-process heating. |
| title | Impact of experimental mass of $^{70}$Kr on the $^{68}$Se waiting-point in $rp$-process |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2512.14145 |