AgBr emulsion with controlled sensitivity for nuclear research

Abstract

The characteristics of controlled-sensitivity nuclear emulsions designed to detect the tracks of fast charged particles are described. These emulsions are distinguished by low development-fog (≈10^-4μm^-3) and low initial track sensitivity (10^-3-10^-2μm^-1). The results of studying these emulsions in a proton beam in controlled and uncontrolled modes are presented. The BR- and RK-type primitive nuclear emulsions controlled by a pulsed electric field are used to attain sensitivity gain factors of up to 100 with a memory time of not longer than 20–30 μs.