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Geometrical information on core-excited states obtained from interference quenching of vibrational states in resonant x-ray photoemission
KTH, Tidigare Institutioner                               , Bioteknologi.
KTH, Tidigare Institutioner                               , Bioteknologi.ORCID-id: 0000-0002-1763-9383
Vise andre og tillknytning
2003 (engelsk)Inngår i: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 67, nr 2Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

An interference quenching of the m=1 final state vibrational line in the resonant Auger decay of N 1s-->pi(*) core-excited N-2 is observed and analyzed. The intensity ratio between the m=1 and m=0 vibrational levels of the X (2)Sigma(g)(+) final state shows a surprising nonmonotonic variation as a function of frequency detuning, going through a minimum with a complete suppression of m=1. We have developed a simple model which indicates a linear relation between the value of the detuning frequency for this minimum and the equilibrium bond distance of the core-excited state. This implies the possibility of determining the equilibrium bond distances for core-excited states to a high degree of accuracy. Simultaneously with the simple model we present a strict theory of the studied effect. This strict theory allows us to explore the accuracy of determining the bond length of the core-excited state from resonant Auger spectra. We obtain a weak influence of the core-hole lifetime on the determined bond length, whereas the number of intermediate vibrational states accounted for in the numerical simulations seems to be quite important.

sted, utgiver, år, opplag, sider
2003. Vol. 67, nr 2
Emneord [en]
auger-spectra, raman, molecules, emission, decay, line, excitation, collapse, n-2, n2
Identifikatorer
URN: urn:nbn:se:kth:diva-22294DOI: 10.1103/PhysRevA.67.022713ISI: 000181361200070Scopus ID: 2-s2.0-85037227245OAI: oai:DiVA.org:kth-22294DiVA, id: diva2:340992
Merknad
QC 20100525Tilgjengelig fra: 2010-08-10 Laget: 2010-08-10 Sist oppdatert: 2020-03-10bibliografisk kontrollert

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