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Collapse of vibrational structure in spectra of resonant x-ray Raman scattering
KTH, Tidigare Institutioner                               , Kemi.
KTH, Tidigare Institutioner                               , Kemi.ORCID-id: 0000-0002-1763-9383
1997 (engelsk)Inngår i: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 56, nr 1, s. 256-264Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Extreme narrowing, or collapse, of electron-vibrational bands is predicted as a new phenomenon in resonant radiative and nonradiative x-ray scattering (RXS) spectra. It is shown that in the inelastic scattering case, that is, when the potential surfaces of ground and final slates are different, a considerable narrowing of the vibronic RXS band results from detuning the excitation Photon frequency omega away from the absorption resonance. By fine tuning the frequency, this may under special circumstances also occur in the region of strong photoabsorption. In the case of elastic Rayleigh scattering, that is, when the potential surfaces of ground and final states are identical, the narrowing results in a total collapse to a single resonance by detuning the frequency. The theory predicts how the differencies in vibrational structure of resonant and nonresonant photoemission spectra depends on the excitation frequency. The effect of frequency detuning on complex spectral multilevel structures due to multiplet: and spin-orbit splittings is discussed qualitatively. It is shown that the notion of: duration time for the x-ray scattering process plays a crucial role in the understanding of RXS spectra.

sted, utgiver, år, opplag, sider
1997. Vol. 56, nr 1, s. 256-264
Emneord [en]
AUGER-SPECTRA, EXCITATION, EMISSION, INTERFERENCE, SYMMETRY, STATES, DECAY
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-13635ISI: A1997XL64500030OAI: oai:DiVA.org:kth-13635DiVA, id: diva2:326277
Merknad
QC 20100622Tilgjengelig fra: 2010-06-22 Laget: 2010-06-22 Sist oppdatert: 2017-12-12bibliografisk kontrollert
Inngår i avhandling
1. X-ray scattering by molecules, surface-adsorbates and solids with a coupling to the nuclear motion
Åpne denne publikasjonen i ny fane eller vindu >>X-ray scattering by molecules, surface-adsorbates and solids with a coupling to the nuclear motion
2000 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH, 2000. s. vi, 36
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-1120 (URN)91-7170-556-2 (ISBN)
Merknad
QC 20100622Tilgjengelig fra: 2000-09-26 Laget: 2000-09-26 Sist oppdatert: 2010-06-22bibliografisk kontrollert
2. Electronic and nuclear dynamics of X-ray processes
Åpne denne publikasjonen i ny fane eller vindu >>Electronic and nuclear dynamics of X-ray processes
2001 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH, 2001. s. viii, 68
Emneord
resonant X-ray Raman scattering, nuclear dynamics, relaxation
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-3189 (URN)91-7283-095-6 (ISBN)
Disputas
2001-06-12, 00:00
Merknad
QC 20100628Tilgjengelig fra: 2001-06-08 Laget: 2001-06-08 Sist oppdatert: 2010-06-29bibliografisk kontrollert

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