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X-ray Raman scattering under pulsed excitation
KTH, Superseded Departments, Biotechnology.
KTH, Superseded Departments, Biotechnology.
KTH, Superseded Departments, Biotechnology.ORCID iD: 0000-0002-1763-9383
2000 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 112, no 13, 5593-5603 p.Article in journal (Refereed) Published
Abstract [en]

Accounting for actual and anticipated developments in synchrotron radiation- and in x-ray and free electron laser techniques, we present a theory of resonant scattering of short-pulsed x rays. Both the instantaneous and integrated-over-observation-time x-ray scattering spectra are studied. Contrary to the commonly accepted notion of an instantaneous probability, we find that the correct quantity describing the resonant x-ray scattering (RXS) experiment is the probability integrated over the time of measurement. It is shown that the integral RXS probability is given by the convolution of the RXS probability for monochromatic excitation with the Wiener-Khintchine spectrum of the nonstationary incident radiation. We have found that short pulses yield a new spectral band following a non-Raman dispersion law. The finite duration of pulses results in a broadening of the Raman resonance. Some aspects of the theoretical analysis of the RXS spectra as functions of the pulse duration time are analyzed by numerical calculations.

Place, publisher, year, edition, pages
2000. Vol. 112, no 13, 5593-5603 p.
Keyword [en]
uger resonant raman, time, molecules, spectrum, light, model, co
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-13838DOI: 10.1063/1.481134ISI: 000085902300010OAI: oai:DiVA.org:kth-13838DiVA: diva2:327678
Note
QC 20100630Available from: 2010-06-30 Created: 2010-06-30 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Wave packet theory of resonant X-ray scattering
Open this publication in new window or tab >>Wave packet theory of resonant X-ray scattering
2001 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2001. x, 43 p.
Keyword
RXS, x-ray scattering, wave packets
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-3188 (URN)91-7283-111-1 (ISBN)
Public defence
2001-06-11, 00:00
Note
QC 20100629Available from: 2001-06-08 Created: 2001-06-08 Last updated: 2010-06-30Bibliographically approved

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Ågren, Hans

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