论文标题
具有量化不确定性的核子核散射的全局显微镜描述
A global microscopic description of nucleon-nucleus scattering with quantified uncertainties
论文作者
论文摘要
我们首次开发微观的全球核子核核电势，其定量不确定性适用于在下一代稀有 - 同位素束设备上分析核反应实验。在改善的局部密度近似且没有任何可调节参数的情况下，我们首先从手学核力量和中性核核电势计算质量范围的五个核力量的质子核和中性核核电势从质量范围12 $ \ leq $ \ leq a $ \ leq $ a $ 242之间的五个核力量<$ ev $ <$ e $ e $1500000。然后，我们为每种手性力的全局光电位进行参数化，从而平稳地取决于弹丸能量以及目标核质量数和同性恋不对称性。弹性散射可观察物的不确定性带是通过对我们全局光电位描述中的参数进行完整的协方差分析而产生的，并针对稳定目标核的现有实验数据进行了基准测试。由于我们的方法纯粹是显微镜，因此我们预计在不稳定同位素上核子散射的模型质量相似。
We develop for the first time a microscopic global nucleon-nucleus optical potential with quantified uncertainties suitable for analyzing nuclear reaction experiments at next-generation rare-isotope beam facilities. Within the improved local density approximation and without any adjustable parameters, we begin by computing proton-nucleus and neutron-nucleus optical potentials from a set of five nuclear forces from chiral effective field theory for 1800 target nuclei in the mass range 12 $\leq$ A $\leq$ 242 for energies between 0 MeV $<$ E $\lesssim$ 150 MeV. We then parameterize a global optical potential for each chiral force that depends smoothly on the projectile energy as well as the target nucleus mass number and isospin asymmetry. Uncertainty bands for elastic scattering observables are generated from a full covariance analysis of the parameters entering in the description of our global optical potential and benchmarked against existing experimental data for stable target nuclei. Since our approach is purely microscopic, we anticipate a similar quality of the model for nucleon scattering on unstable isotopes.
