~（50）Fe（p，γ）~（51）Co热核反应速率的再评价
Reevaluation of thermonuclear reaction rate of 50Fe(p,gamma)51Co
摘要：
根据兰州CSRe最近的精确质量测量，重新估算了I型X射线暴（XRB）温度范围内50 Fe（p，γ）51 Co反应的热核反应速率，首次确定了51 Co核的质子分离能Sp=142+/-77keV。与以前的理论预测相比，实验Sp值具有更小的不确定性。基于核壳模型和镜像原子核结构信息，利用实验测量的Sp值计算了~（50）Fe（p，γ）~（51）Co反应的两组热核反应速率。结果表明，由于51 Co的低激发态激发态密度较低，因此，用双稳态模型计算该反应并不理想。在这项工作中，我们建议，一套新的反应速率的基础上的镜像结构的51 Cr应纳入未来的天体物理网络计算。
英文摘要：
The thermonuclear rate of the 50Fe(p,gamma)51Co reaction in the Type I X-ray bursts (XRBs) temperature range has been reevaluated based on a recent precise mass measurement at CSRe lanzhou, where the proton separation energy Sp=142+/-77 keV has been determined firstly for the 51Co nucleus. Comparing to the previous theoretical predictions, the experimental Sp value has much smaller uncertainty. Based on the nuclear shell model and mirror nuclear structure information, we have calculated two sets of thermonuclear rates for the 50Fe(p,gamma)51Co reaction by utilizing the experimental Sp value. It shows that the statistical-model calculations are not ideally applicable for this reaction primarily because of the low density of low-lying excited states in 51Co. In this work, we recommend that a set of new reaction rate based on the mirror structure of 51Cr should be incorporated in the future astrophysical network calculations.
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