Charge exchange of O− scattering on a Si(111) surface Quanjun Wang, Shunli Qiu, Feifei Xiong, Yuan Li, Bin Ding, Yanling Guo, Ximeng Chen and Lin Chen Eur. Phys. J. D, 69 9 (2015) 210 Published online: 11 September 2015 DOI: 10.1140/epjd/e2015-60057-0