ON THE SPARKABLE REGION PHENOMENA IN ELECTROCHEMICAL ETCHING

It was observed by Hassib, et al.. that, for electrochemical etching o f a given alpha energy, a layer has to be removed from the detector su rface to reach a defined region. At this region, the track geometry is quite suitable to be sparked when applying the electric field. No tra cks can be revealed electrochemically before reaching or after exceedi ng this region. In this work, a study is given about the sparkable reg ion phenomena in view of the energy loss mechanism of alpha particles in the detector material. Some empirical formulae are given to correla te the depth and the width of the sparkable region with the energy of normal incident alpha particles.