High-energy electron radiography of microstructures in a dense material Rong Qi, Ye Tian, Guo-Qing Zhang, Ya-Feng Bai, Shi-Yi Zhou, Yu-Shan Zeng, Hai-Yi Sun, Xing-Tao Wang, Xiao-Ya Li and Jian-Sheng Liu Eur. Phys. J. Appl. Phys., 75 3 (2016) 30701 Published online: 02 August 2016 DOI: 10.1051/epjap/2016160009