TY - JOUR AU - Herwig, Kenneth AU - Snow, W AU - Blasdell, R AU - Sokol, P C2 - Physical Review B (Condensed Matter and Materials Physics) DA - 1991-01-01 00:01:00 LA - en M1 - 44 PB - Physical Review B (Condensed Matter and Materials Physics) PY - 1991 TI - Deviations from the Impulse Approximation in Liquid 4He, Momentum Transfer Dependence ER -