Oa. Fojon et al., POSITRONIUM FORMATION PRODUCED IN COLLISIONS OF FAST POSITRONS WITH ATOMS (IONS), Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 132(2), 1997, pp. 331-334
Formation of positronium (Ps) atoms in collisions of fast positrons im
pacting on atoms (ions) is studied. Total cross sections (TCSs) for hy
drogen targets obtained with several theoretical approximations are co
mpared. Scaling laws for hydrogenic targets are given, The TCSs for po
tassium targets are computed and comparison with other theories and ex
periments is made. (C) 1997 Elsevier Science B.V.