TY - GEN AU - Foster,M AU - Peacher,J L AU - Schulz,M AU - Madison,D H AU - Chen,Zhangjin AU - Walters,H R J TI - Unexpected higher-order effects in charged particle impact ionization at high energies SN - 0031-9007 PY - 2006///1201 N1 - Publication Type: Journal Article UR - https://doi.org/10.1103/PhysRevLett.97.093202 ER -