在富中子稀土中解释太阳$r$过程丰度的局部核物理特征的需要
The need for a local nuclear physics feature in the neutron-rich rare-earths to explain solar $r$-process abundances
摘要:
我们应用马尔可夫链蒙特卡罗预测所需的质量,形成观测到的太阳$r$过程稀土丰度峰。鉴于高度不同的天体物理流出和核输入,我们发现,结果是最敏感的$r$过程的动态(即反应和衰变之间的整体竞争),具有类似的质量趋势预测类似的动态。我们表明,无论裂变是否沉积到稀土中,我们的算法始终预测富中子镧系元素需要增强稳定性的局部核物理特征。
英文摘要:
We apply Markov Chain Monte Carlo to predict the masses required to form the observed solar $r$-process rare-earth abundance peak. Given highly distinct astrophysical outflows and nuclear inputs, we find that results are most sensitive to the $r$-process dynamics (i.e. overall competition between reactions and decays), with similar mass trends predicted given similar dynamics. We show that regardless of whether fission deposits into the rare-earths or not, our algorithm consistently predicts the need for a local nuclear physics feature of enhanced stability in the neutron-rich lanthanides.
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