Nuclear reactions play a key role in the framework of the Big Bang Nucleosynthesis. A network of 12 principal reactions has been identified as the main path that drove the elemental nucleosynthesis in the first 20 min of the history of the Universe. Among them an important role is played by neutron-induced reactions, which, from an experimental point of view, are usually a difficult task to be measured directly. Nevertheless big efforts in the last decades have led to a better understanding of their role in the primordial nucleosynthesis network. In this work we apply the Trojan Horse Method to extract the cross section at astrophysical energies for the \(^3\text {He}\)(n,p)\(^3\text {H}\) reaction after a detailed study of the \(^2\hbox {H}\)(\(^3\text {He}\),pt)H three-body process. Data extracted from the present measurement are compared with other published sets.

中文翻译：

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Big Bang能量处的$$ ^ 3 \ hbox {He} $$ 3 He（n，p）$$ ^ 3 \ hbox {H} $$ 3 H反应截面的间接测量

核反应在“大爆炸”核合成的框架中起关键作用。已经确定了由12个主要反应组成的网络，这是在宇宙历史的前20分钟内推动元素核合成的主要途径。其中，中子诱发的反应起着重要的作用，从实验的角度来看，中子诱发的反应通常是很难直接测量的任务。然而，在过去的数十年中的巨大努力已经导致人们对其在原始核合成网络中的作用有了更好的了解。在这项工作中，我们使用特洛伊木马方法提取了详细的\（^ 3 \ text {He} \）（n，p）\（^ 3 \ text {H} \）反应的天体能量截面。所述的研究\（^ 2 \ hbox中{H} \） （\（^ 3 \ text {He} \），pt）H三体过程。从当前测量中提取的数据与其他已发布的数据集进行比较。