Precision Mass Measurements of ^{129-131}Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process.
Precision Mass Measurements of ^{129-131}Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process.
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DOI：
10.1103/physrevlett.115.232501
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发表时间：
2015-12
影响因子：
8.6
通讯作者：
D. Atanasov;P. Ascher;K. Blaum;R. Cakirli;T. Cocolios;S. George;S. Goriely;F. Herfurth;H. Janka-H.-Ja
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文献类型：
--
作者：
D. Atanasov;P. Ascher;K. Blaum;R. Cakirli;T. Cocolios;S. George;S. Goriely;F. Herfurth;H. Janka-H.-Ja
经典的等待点核素^{130}Cd附近的质量已经通过使用ISOLDE/CERN的Penning阱光谱仪ISOLTRAP测量。我们发现一个显着的偏差超过400千电子伏，从早期的值使用核β衰变数据进行评估。新的测量结果表明，N=82的壳层间隙在双幻^{132}Sn以下减小。核合成与喷射风II型超新星，以及从紧凑的对象二进制合并的研究，通过使用国家的最先进的流体动力学模拟。我们发现，新测量的质量对A=128-132区域的丰度计算值有一致和直接的影响，并减少了精确质量输入数据的不确定性。
Masses adjacent to the classical waiting-point nuclide ^{130}Cd have been measured by using the Penning-trap spectrometer ISOLTRAP at ISOLDE/CERN. We find a significant deviation of over 400 keV from earlier values evaluated by using nuclear beta-decay data. The new measurements show the reduction of the N=82 shell gap below the doubly magic ^{132}Sn. The nucleosynthesis associated with the ejected wind from type-II supernovae as well as from compact object binary mergers is studied, by using state-of-the-art hydrodynamic simulations. We find a consistent and direct impact of the newly measured masses on the calculated abundances in the A=128-132 region and a reduction of the uncertainties from the precision mass input data.