Interaction of laser light waves by dynamic stark splitting

The internal stresses of condensed films are measured during both, condensation and annealing. Especially, materials are studied which can be stabilized in amorphous phases by quenching condensation technique. All amorphous films of Bi, Bi + Pb, Bi+Sb, Pb+Bi and Sn+Cu grow without any noticeable stress. In contrary, amorphous Sb-films arise with remarkable tensil stresses. The probably important difference between Sb and the other materials consists in the composition of the vapor. At normal evaporation conditions Sb-vapor contains almost only Sb₄-molecules, whereas the other materials evaporate monoatomically. The results are discussed with regard to a modell for the origin of the stresses based on the socalled Ostwald's rule for crystal growth.