Effects of buried high-Z layers on fast electron propagation Xiaohu Yang, Han Xu, Hongbin Zhuo, Yanyun Ma, Fuqiu Shao, Yan Yin and Marco Borghesi Eur. Phys. J. D, 68 2 (2014) 30 Published online: 13 February 2014 DOI: 10.1140/epjd/e2013-40576-4