Electronic state-lifetime interference in resonant Auger spectra: a tool to disentangle overlapping core-excited states. Issue 22 (20th May 2016)

• Record Type: Journal Article
• Authors: Goldsztejn, Gildas; Marchenko, Tatiana; Céolin, Denis; Journel, Loïc; Guillemin, Renaud; Rueff, Jean-Pascal; Kushawaha, Rajesh K.; Püttner, Ralph; Piancastelli, Maria Novella; Simon, Marc
• Is Part Of: Physical chemistry chemical physics. Volume 18:Issue 22(2016)
• Page Start: 15133
• Page End: 15142
• Publication Date: 2016-05-20
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp01998f
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Thanks to a new fit approach, electronic state-lifetime interference terms are extracted and used to disentangle overlapping states. Abstract : We have measured resonant-Auger decay following Cl 1s −1 excitations in HCl and CH3 Cl molecules, and extracted the pseudo-cross sections of different Cl 2p −2 final states. These cross sections show clear evidence of shake processes as well as contributions of electronic state-lifetime interference (ELI). To describe the spectra we developed a fit approach that takes into account ELI contributions and ultrafast nuclear dynamics in dissociative core-excited states. Using this approach we utilized the ELI contributions to obtain the intensity ratios of the overlapping states Cl 1s −1 4pπ/1s −1 4pσ in HCl and Cl 1s −1 4pe/1s −1 4pa1 in CH3 Cl. The experimental value for HCl is compared with theoretical results showing satisfactory agreement.