TY - JOUR AU - Guo, X AU - Bell, E AU - Thompson, J AU - Dunn, G AU - Bannister, M AU - Phaneuf, Ray AU - Smith, A C2 - Physical Review A (Atomic, Molecular and Optical Physics) DA - 1993-01-01 00:01:00 LA - en M1 - 47 PB - Physical Review A (Atomic, Molecular and Optical Physics) PY - 1993 TI - Evidence for significant back-scattering in near-threshold electron-impact excitation of Ar7+(3s to 3p) ER -