K-shell ionization of 25–100 keV Nq+ (q = 3, 5) ions impinging on Al and Cu surfaces Bing-Zhang Zhang, Zhang-Yong Song, Xuan Liu, Cheng Qian, Xing Fang, Chao-Jie Shao, Wei Wang, Jun-Liang Liu, Jun-Kui Xu, Yong Feng et al. (6 more) Eur. Phys. J. D, 76 3 (2022) 49 Published online: 15 March 2022 DOI: 10.1140/epjd/s10053-022-00378-7