论文标题
使用改善的热核反应速率的光元素的大爆炸核合成丰度
The Big Bang Nucleosynthesis abundances of the light elements using improved thermonuclear reaction rates
论文作者
论文摘要
大爆炸核合成（BBN）是同质和各向同性扩展宇宙的重要阶段。然后可以将计算光元素合成的结果与光元素的丰度进行比较。 BBN模型的理论计算取决于核物理实验测量的早期宇宙和反应横截面的初始条件。最近，提出了NACRE（反应的核天体物理学汇编）数据库的更新。这种改进的汇编包括34个两体反应的热核反应速率（15个是粒子转移反应，而十九个是辐射捕获反应）。在这项工作中，我们通过在代码\ texttt {alterBBn}的框架中使用这些更新的热核反应率来计算BBN丰度。我们的结果表明，原始锂丰度的新数值结果比以前的计算大7.1％。
Big Bang Nucleosynthesis (BBN) is an important stage of a homogeneous and isotropic expanding universe. The results of calculation of the synthesis of light elements during this epoch can then be compared with the abundances of the light elements. The theoretical calculation of the BBN model depends on the initial conditions of the early universe and reaction cross sections measured by the nuclear physics experiment. Recently, an update of the NACRE (Nuclear Astrophysics Compilation of REactions) database is presented. This improved compilation comprises thermonuclear reaction rates for 34 two-body reactions on light nuclides (fifteen are particle transfer reactions and nineteen are radiative capture reactions). In this work, we calculate the BBN abundances by using these updated thermonuclear reaction rates in the framework of the code \texttt{AlterBBN}. Our results suggest that the new numerical result of the primordial Lithium abundance is 7.1 percent larger than the previous calculation.
