Studying the process of heavy charged particle track etching by the conductometric method

Determination technique of longitudinal rate of charged particles track etching with simultaneous counting of their number in polymer film detector according to the change of the detector electric resistance during the etching is described. Dependences of the calculated and measured in the process of etching electric resistance of the solution in track on the etching time is presented. To determine the etching rate the mean value of through etching time which is determined as the time necessary for opening half of the pore total number is used. It is shown that track diameter increases in time linearly starting from approximately 20 A in its most narrow part, and the etching rate of the track channel walls is equal to the rate of film etching from the surface. It is underlined that the etching rate is determined with an accuracy of +-10 %; the error of the determination of through pores number not exceeding 20 %