An attempt to produce artificial radioactivity by an electron beam, with some notes on the behaviour of newly made Geiger-Muller counters

Abstract

An unsuccessful attempt has been made to detect artificial radioactivity in aluminium after bombardment with electrons at 300 kV. During these experiments a transitory activity produced by cleaning the walls was observed in a Geiger counter. It is suggested that this might be due directly or indirectly to a progressive oxidation of the inner surface of the walls.