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MO: Fachverband Molekülphysik
MO 2: Elektronische Spektroskopie
MO 2.1: Vortrag
Montag, 10. März 2008, 16:30–16:45, 3F
State-dependent gerade/ungerade intensity ratios in the Auger spectrum of N2 — •Ralph Püttner1,2, Hironobu Fukuzawa2, Xiao-Jing Liu2, Sergey Semenov3, Nikolai Cherepkov3, Takahiro Tanaka4, Masamitsu Hoshino4, Hiroshi Tanaka4, and Kiyoshi Ueda2 — 1Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany — 2Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan — 3State University of Aerospace Instrumentation, 190000, St. Petersburg, Russia — 4Department of Physics, Sophia University, Tokyo 102-8554, Japan
Auger spectra of the N 1sσg,u core holes in N2 to five different quasi-stable final states are presented; they exhibit the gerade/ungerade splitting as well as vibrational progressions. The N 1sσg/N 1sσu Auger intensity ratio depends on the final state. In particular, for the states X 1Σg+ and D 1Σu+ ratios of ≅2.1 and ≅0.8 are derived. These values are in agreement with ab initio calculations and the large value for the X state can qualitatively be related to the gerade or ungerade symmetry of the Auger electron. In addition, from the vibrational progressions in the Auger spectrum, the vibrational energies ℏω, the anharmonicities xℏω and the equilibrium distances Re for the dicationic final states are derived in a fit analysis assuming Morse potentials.