Ab initio informed evaluation of the radiative capture of protons on $^7$Be
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arXiv
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| Format: | Preprint |
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2022
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| _version_ | 1866917728076431360 |
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| author | Kravvaris, Konstantinos Navrátil, Petr Quaglioni, Sofia Hebborn, Chloë Hupin, Guillaume |
| author_facet | Kravvaris, Konstantinos Navrátil, Petr Quaglioni, Sofia Hebborn, Chloë Hupin, Guillaume |
| contents | The radiative capture of protons by $^7$Be, which is the source of $^8$B that $β$-decays emitting the majority of solar neutrinos measured on earth, has not yet been measured at astrophysically relevant energies. The recommended value for its zero-energy S-factor, $S_{17}$(0) = 20.8$\pm$(0.7)exp$\pm$(1.4)theory eV$\cdot$b, relies on theoretical extrapolations from higher-energy measurements, a process that leads to significant uncertainty. We performed a set of first-principle (or, ab initio) calculations of the $^7$Be($p$, $γ$)$^8$B reaction to provide an independent prediction of the low-energy S-factor with quantified uncertainties. We demonstrate underlying features in the predicted S-factor allowing the combination of theoretical calculations and measurements to produce an evaluated S-factor of $S_{17}$(0) = 19.8$\pm$0.3 eV$\cdot$b. We expect the calculations and uncertainty quantification process described here to set a new standard for the evaluation of light-ion astrophysical reactions. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2202_11759 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Ab initio informed evaluation of the radiative capture of protons on $^7$Be Kravvaris, Konstantinos Navrátil, Petr Quaglioni, Sofia Hebborn, Chloë Hupin, Guillaume Nuclear Theory Nuclear Experiment The radiative capture of protons by $^7$Be, which is the source of $^8$B that $β$-decays emitting the majority of solar neutrinos measured on earth, has not yet been measured at astrophysically relevant energies. The recommended value for its zero-energy S-factor, $S_{17}$(0) = 20.8$\pm$(0.7)exp$\pm$(1.4)theory eV$\cdot$b, relies on theoretical extrapolations from higher-energy measurements, a process that leads to significant uncertainty. We performed a set of first-principle (or, ab initio) calculations of the $^7$Be($p$, $γ$)$^8$B reaction to provide an independent prediction of the low-energy S-factor with quantified uncertainties. We demonstrate underlying features in the predicted S-factor allowing the combination of theoretical calculations and measurements to produce an evaluated S-factor of $S_{17}$(0) = 19.8$\pm$0.3 eV$\cdot$b. We expect the calculations and uncertainty quantification process described here to set a new standard for the evaluation of light-ion astrophysical reactions. |
| title | Ab initio informed evaluation of the radiative capture of protons on $^7$Be |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2202.11759 |