Impact of Nuclear Mass Uncertainties on the r Process.
Impact of Nuclear Mass Uncertainties on the r Process.
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DOI：
10.1103/physrevlett.116.121101
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发表时间：
2015-12
影响因子：
8.6
通讯作者：
D. Martin;A. Arcones;W. Nazarewicz;E. Olsen
中科院分区：
文献类型：
--
作者：
D. Martin;A. Arcones;W. Nazarewicz;E. Olsen
原子核质量在理解宇宙中最重的元素是如何在r过程中产生的方面起着重要作用。我们预测r-过程核合成产率使用中子捕获和光解率的基础上的核密度泛函理论。使用六Skyrme能量密度泛函基于不同的优化协议，我们确定第一次系统的不确定性带相关的质量建模的r-过程丰度在现实的天体物理场景。我们发现，基本的微观物理的功能，特别是在附近的中子壳封闭的丰度的印记：abductile峰和谷反映在中子分离能的趋势。核理论和实验的进一步发展，当与观测相联系时，将有助于理解极端r过程地点的天体物理条件。
Nuclear masses play a fundamental role in understanding how the heaviest elements in the Universe are created in the r process. We predict r-process nucleosynthesis yields using neutron capture and photodissociation rates that are based on the nuclear density functional theory. Using six Skyrme energy density functionals based on different optimization protocols, we determine for the first time systematic uncertainty bands-related to mass modeling-for r-process abundances in realistic astrophysical scenarios. We find that features of the underlying microphysics make an imprint on abundances especially in the vicinity of neutron shell closures: Abundance peaks and troughs are reflected in trends of neutron separation energy. Further advances in the nuclear theory and experiments, when linked to observations, will help in the understanding of astrophysical conditions in extreme r-process sites.