Abstract

CR-39 track detectors irradiated with alpha particles were chemically etched while under mechanical stress. Depending on tensile stress magnitude the response of track size and shape was observed to form two distinct domains: in the first domain sizes of track minor and major axis both increase slightly with increasing stress while in the second domain tracks show new shape due to a triangular extensions perpendicular to the stress direction. A simple model is proposed which explains the new etched track shape. With increasing compressive stress both minor and major axis sizes decrease but no change in chape occurs.

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