Helium release and amorphization resistance in ion irradiated nanochannel films Mengqing Hong, Yongqiang Wang, Feng Ren, Hongxiu Zhang, Dejun Fu, Bing Yang, Xiangheng Xiao and Changzhong Jiang EPL, 106 1 (2014) 12001 Published online: 11 April 2014 DOI: 10.1209/0295-5075/106/12001