Experimental Evidence for Nuclear Excitation by Electron Transition in 189Os

Abstract

Recently it was pointed out that in the deexcitation of the orbital electron system the third mechanism named "nuclear excitation by electron transition" (NEET) is theoretically possible, besides X-ray and Auger electron emissions. 1 l We tried to discover this phenomenon in 189 0s experimentally by detecting the 169 mOs radioactivity.