Among the reactions involved in the production and destruction of deuterium during Big Bang Nucleosynthesis, the deuterium-burning D(p,\(\gamma \))\(^3\)He reaction has the largest uncertainty and limits the precision of theoretical estimates of primordial deuterium abundance. Here we report the results of a careful commissioning of the experimental setup used to measure the cross-section of the D(p,\(\gamma \))\(^3\)He reaction at the Laboratory for Underground Nuclear Astrophysics of the Gran Sasso Laboratory (Italy). The commissioning was aimed at minimising all sources of systematic uncertainty in the measured cross sections. The overall systematic error achieved (\(< 3\%\)) will enable improved predictions of BBN deuterium abundance.

中文翻译：

---

设置调试以改进D（p，$$ \γ$$γ）$$ ^ 3 $$ 3 He大截面核合成能量的He截面的测量

在大爆炸核合成过程中与氘的产生和破坏有关的反应中，燃烧氘的D（p，\（\（gamma \））（^ 3 \） He反应具有最大的不确定性，并限制了理论估计的准确性原始氘的丰度。在这里，我们报告了仔细调试用于测量D（p，\（\（gamma \））\（^ 3 \） He的横截面的实验装置的结果。Gran Sasso实验室（意大利）。调试旨在最大程度地减少测量横截面中系统不确定性的所有来源。实现的总体系统误差（\（<3 \％\））将有助于改善对BBN氘丰度的预测。