Momentum dependence of the nuclear mean field from peripheral heavy-ion collisions

The energy at which the collective transverse flow in the reaction plane disappears, the balance energy Ebal, is found to increase linearly as a function of impact parameter for ⁴⁰Ar{+}⁴⁵$Sc reactions. Comparison of our measured values of ${E}bal$(b) with predictions from quantum molecular dynamics (QMD) model calculations agrees better with an approach incorporating momentum dependence in the nuclear mean field. {} 1996 The American Physical Society.