Is CO Carbon Auger electron emission affected by the photoelectron ?

Prmper, G.*; Fukuzawa, Hironobu*; Rolles, D.*; Sakai, Katsunori*; Prince, K. C.*; Harries, J.; Tamenori, Yusuke*; Berrah, N.*; Ueda, Kiyoshi*

Using an electron-ion coincidence experiment, a long-standing question regarding the applicability of the "two-step model" to the Auger decay following C 1s excitation in the CO molecule is addressed. The momenta of O fragments are recorded in coincidence with C(1s) KVV Auger electrons for 3 different photon energies and both vertical and horizontal polarization of the incident radiation. The angular distribution of the Auger electrons is found to be independent of both energy and polarization, and the two-step model deemed to be valid.