论文标题
从头算在$^7 $上对质子的辐射捕获的知情评估
Ab initio informed evaluation of the radiative capture of protons on $^7$Be
论文作者
论文摘要
$^7 $ be对质子的辐射捕获，这是$^8 $ b的来源，即$β$ - 定期在地球上测量的大多数太阳中微子发射，但尚未在天体相关的能量上进行测量。其零能量s因子的建议值，$ s_ {17} $（0）= 20.8 $ \ pm $（0.7）exp $ \ pm $ \ pm $（1.4）理论ev $ \ cdot $ b，依赖于理论上的外交，这是从更高的能量测量中引起重大不确定的过程。我们对$^7 $ be（$ p $，$γ$）$^8 $ b反应进行了一组原则（或从头算）的计算，以提供对低能量S因子的独立预测，并具有量化的不确定性。我们在预测的S因子中演示了基本功能，允许将理论计算和测量的组合产生$ s_ {17} $（0）= 19.8 $ \ pm $ 0.3 ev $ \ cdot $ b的评估的S因子。我们期望此处描述的计算和不确定性量化过程为评估光 - 离子天体物理反应的新标准设置。
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.
