Nuclear physical inputs are critical for predicting the abundance of -process elements. Extensive sensitivity studies have recently been performed to gauge the impact of the individual properties of nuclei on the -process. In this work, we investigate the impact of the large uncertainties in the theoretical predictions of the masses of neutron-rich Sn isotopes and the location of the neutron drip line on the abundance of -process abundances. The uncertainties in the predicted -process abundances are obtained through large-scale network calculations by simultaneously varying the masses and reaction rates of Sn within the predicted mass uncertainties. The calculations use a generally indicative astrophysical trajectory of neutron-star mergers and are based on three different mass models. The results indicate that the large uncertainty in the location of the neutron drip line for Sn can significantly and asymmetrically affect the predicted abundances of nuclei after the second peak, in particular around , sometimes accompanied by a delayed freeze-out.

中文翻译：

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Sn中子滴线的位置及其对r过程丰度的影响


核物理输入对于预测过程元素的丰度至关重要。最近进行了广泛的敏感性研究，以衡量原子核的个体特性对该过程的影响。在这项工作中，我们研究了富中子 Sn 同位素质量的理论预测中的巨大不确定性以及中子滴线位置对过程丰度的影响。预测过程丰度的不确定性是通过大规模网络计算获得的，通过在预测质量不确定性内同时改变 Sn 的质量和反应速率。这些计算使用中子星合并的一般指示性天体物理轨迹，并基于三种不同的质量模型。结果表明，Sn 中子滴线位置的巨大不确定性会显着且不对称地影响第二个峰值后的原子核丰度预测，特别是在 附近，有时会伴随延迟冻结。