Deep Interference Minima In Experimental Ionization Differential Cross Sections

A deep, narrow interference minimum that exists for symmetric noncoplanar (e,2e) ionization experiments, first discovered in helium, has now been found in neon. In helium, the 1s electron is ionized, whereas in neon, the minimum is observed ionizing the inner 2s electron. The depth of the measured minima indicates that a simple, underlying coherent process is occurring in the reaction.