Covariance analysis for total neutron cross sections based on a microscopic optical model potential Ruirui Xu, Zhigang Ge, Tingjin Liu, Yue Zhang, Xi Tao and Zhi Zhang EPJ Nuclear Sci. Technol., 4 (2018) 37 Published online: 14 November 2018 DOI: 10.1051/epjn/2018037