Inner-valence Auger decay in chloroform after Cl 2p ionization

The inner-valence Auger electron spectra after the chlorine 2p ionization in the gas phase CHCl₃ molecule were investigated both theoretically and experimentally. The total ion yield spectrum exhibits a broad structure at 217 eV, above the Cl 2p ionization threshold, which can be attributed to either a shape resonance or a shake-up. In addition, we have performed a series of high-level ab initio quantum mechanical calculations at the density functional theory level to compute the Auger lines.