原始重元素生产
Primordial heavy element production
摘要：
许多可能的机制已经被提出来产生早期宇宙中的密度不均匀性，这些密度不均匀性可以持续到原始核合成开始并产生富含中子的区域。在这项工作中，我们不关心的不均匀性是如何产生的，但我们想把重点放在这种不均匀性对原始核合成的影响。本文分析了一种被提出的不均匀性特征，即在原初r过程中通过中子俘获合成超重元素，并给出了不同重子光子比$η$和涨落长度尺度$L$的结果。
英文摘要：
A number of possible mechanisms have been suggested to generate density inhomogeneities in the early Universe which could survive until the onset of primordial nucleosynthesis and generate neutron-rich regions. In this work we are not concerned with how the inhomogeneities were generated but we want to focus on the effect of such inhomogeneities on primordial nucleosynthesis. One of the proposed signatures of inhomogeneity, the synthesis of very heavy elements by neutron capture in a primordial r-process, was analyzed for varying baryon to photon ratios $η$ and fluctuation length scales $L$.
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