A study of inner-valence Auger transitions in Ne+ induced by the resonant Auger decay of photoexcited Ne 1s-1np states

High-resolution electron spectrometry is used to investigate inner-valence Auger transitions in Ne+. The following series of transitions have been observed: Ne+ 2s12p5(1,3P)np → Ne2+ 2s22p4 3P, 1D and Ne+ 2s02p6(1S)np→ Ne2+ 2s12p5 1,3P. In addition, we have observed a new series of valence inter-multiplet Auger transitions Ne+ 2s12p5(1P)np → Ne2+ 2s12p5 3P. The initial states of these transitions were populated by the resonant Auger decay of photoexcited Ne 1s−1np resonances. Thus, the investigated transitions constitute the second step in an Auger cascade process. The photon energy was chosen to effectively populate Rydberg states of Ne+ with n = 4–10. The energy positions, quantum defects, relative intensity and angular distribution parameters of the Ne+ Auger electron emission have been determined. Experimental results are compared with multi-configuration Dirac–Fock calculations carried out as a part of this study.