丰度的速率分析或可能的解释
Rate Analysis or a Possible Interpretation of Abundances
摘要：
重元素是在核合成过程中形成的。这些元素的丰度可以分为元素丰度、同位素丰度和原子核丰度。在这项工作中，我们建议改变核子识别从通常的（Z，A）到（Z，N），这允许读出新的信息，从测量的丰度。我们感兴趣的中子密度所需的再现测量丰度的核假设平衡过程。这只有在两个稳定的原子核被一个不稳定的原子核分开时才有可能。在这些地方，我们调查了平衡核合成所需的同位素和同位素在AGB脉冲间和热脉冲阶段的温度的中子密度。在大多数情况下，我们得到了平衡核合成中子密度的估计。接下来，我们研究了部分形成原子核的可能性。我们分析了分支因子的含义。我们找到了一个数学定义，统一解释了分支点在保序情况下是封闭的，在同位素情况下是开放的。我们引入了一个更有表现力的分支比变量，称为部分形成率。有了这些，我们就能够确定特征中子密度值。
英文摘要：
Heavy elements are formed in nucleosynthesis processes. Abundances of these elements can be classified as elemental abundance, isotopic abundance, and abundance of nuclei. In this work we propose to change nucleon identification from the usual (Z,A) to (Z,N), which allows reading out new information from the measured abundances. We are interested in the neutron density required to reproduce the measured abundance of nuclei assuming equilibrium processes. This is only possible when two stable nuclei are separated by an unstable nucleus. At these places we investigated the neutron density required for equilibrium nucleosynthesis both isotopically and isotonically at temperatures of AGB interpulse and thermal pulse phases. We obtained an estimate for equilibrium nucleosynthesis neutron density in most of the cases. Next we investigated the possibility of partial formation of nuclei. We analyzed the meaning of the branching factor. We found a mathematical definition for the unified interpretation of a branching point closed at isotonic case and open at isotopic case. We introduce a more expressive variant of branching ratio called partial formation rate. With these we are capable of determining the characteristic neutron density values.
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