Zhang Youjin1; Chen Yongshou2; Guo Jianyou1; Hou Suqing2; Li Zhihong2; Shi Jianrong3
Source Publicationsciencechinaphysicsmechanicsastronomy
AbstractThe heavy elements in the Universe are formed during the s- and r-processes mainly in AGB stars and supernovae, respectively. Simulation of s- and r-nucleosynthesis critically depends on the neutron capture and weak decay rates for all the nuclei on the reaction chain. The present work analyzes systematically the neutron capture rates (cross sections) for the s-process nuclei, including ~3000 rates on ~200 nuclei. The network calculations for the constant temperature s-process have been performed using the different data sets selected as the nuclear inputs to investigate the uncertainties in the predicted s-abundances. We show that the available cross sections of neutron capture on many s-process nuclei still carry large uncertainties, which lead to low accuracy in the determination of s-process isotope abundances. We analyze the neutron capture cross section data for the same unique isobar nucleus accorded by year from previous work. Such an analysis indicates that the s-process has been studied for more than fifty years and there exist two research stages around 1976 and 2002, respectively. The needs and opportunities for future experiments and theoretical tools are highlighted to remove the existing shortcomings in the neutron capture rates.
Document Type期刊论文
Recommended Citation
GB/T 7714
Zhang Youjin,Chen Yongshou,Guo Jianyou,et al. nuclearuncertaintiesinthesprocesssimulation[J]. sciencechinaphysicsmechanicsastronomy,2013,56(5):859.
APA Zhang Youjin,Chen Yongshou,Guo Jianyou,Hou Suqing,Li Zhihong,&Shi Jianrong.(2013).nuclearuncertaintiesinthesprocesssimulation.sciencechinaphysicsmechanicsastronomy,56(5),859.
MLA Zhang Youjin,et al."nuclearuncertaintiesinthesprocesssimulation".sciencechinaphysicsmechanicsastronomy 56.5(2013):859.
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