SIMULATION OF THE TRACK GROWTH AND DETERMINING THE TRACK PARAMETERS

We have found the equation of the etch pit wall in solid state nuclear track detectors, as follows: [GRAPHICS] where: x is the distance alon g a track from the point where the particle entered the detector; V(x) is the ratio of the track etch rate to the bulk etch rate; C is the i ntegration constant that can be determined from particle penetration d epth, and y is the normal distance from the particle trajectory to the etch pit wall. The equation is derived assuming the increasing track etch rate V-t along the particle trajectory. The above equation can be used for the simulation of the track growth and calculating the major and the minor axis of the etch pit opening. The corresponding compute r program was set up. The input parameters of this program are: alpha particle energy, incidence angle and removed layer: the output are tra ck parameters. The results obtained by this method are compared with a nother approach given by Somogyi and Szalay (1973) and reasonably good agreement is found.