Correlation Effect and Double Electron Ejection in the Photoabsorption Process

Abstract
Within the framework of many-body perturbation theory, a calculation has been carried out for the process of double electron ejection in photoabsorption, γ+Ne(1s22s22p6)Ne++(1s22s22p4)+e+e. Excellent agreement with experiment has been obtained. The importance of electron-electron correlation and the dominant physical processes involved are discussed.