Measurement of projected range of charged particles by radiation blistering

The paper describes how radiation blistering phenomenon can be utilized to find out the projected ranges of charged particles in the solids. Varying either the implanted dose or post implantation temperature, it is possible to rupture the blister leaving behind a pit. The depth of pit obtained by exfoliation of surface bombarded with a particular energy is remarkably constant and can be measured by optical means. The exfoliation depths reported earlier for MgO bombarded with proton (KeV range) have been shown to represent the projected ranges. The stopping power follows epsilonsup(1/2) power law, clearly indicating that slowing down of proton is mainly due to electronic collisions. (author)