Binary theory of antiproton stopping

Binary theory of electronic stopping, developed recently with the aim of qu antifying stopping forces on swift heavy ions, has been applied to antiprot on stopping. Essential ingredients in the theory are inverse-Bloch and shel l corrections. The numerical input consists of the excitation spectrum of t he stopping material, characterized by bundled oscillator strengths extract ed from tabulated optical properties. Predicted stopping forces for eight s olid materials agree welt with experimental data, in particular for Si wher e measurements span over two decades of projectile energy. Large discrepanc ies were found with stopping data for helium extracted from annihilation ti me measurements.