GAS-FLOW DIFFUSION CHAMBER FOR VAPOR NUCLEATION STUDIES - RELATIONS BETWEEN NUCLEATION RATE, CRITICAL NUCLEUS SIZE AND ENTROPY OF TRANSITION FROM A METASTABLE INTO A STABLE STATE

Modification of the method of mixing considered makes it possible to carry out nucleation experiments in coaxial laminar vapor-gas streams having different temperatures. The vapor flow diffusion chamber realizes this method and is described together with new experiments on the nucleation rate determination of supersaturated vapor. These experiments made it possible to determine critical sizes of nuclei of the new phase in supercooled vapor. The possibility of experimental determination of the entropy of phase transition from metastable to stable state is theoretically shown.