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Media type:
E-Article
Title:
Free-Electron Lasers: New Avenues in Molecular Physics and Photochemistry
Contributor:
Ullrich, Joachim;
Rudenko, Artem;
Moshammer, Robert
Published:
Annual Reviews, 2012
Published in:
Annual Review of Physical Chemistry, 63 (2012) 1, Seite 635-660
Language:
English
DOI:
10.1146/annurev-physchem-032511-143720
ISSN:
0066-426X;
1545-1593
Origination:
Footnote:
Description:
Free-electron lasers are fourth-generation light sources that deliver extremely intense (>1012 photons per pulse), ultrashort (∼10−14 s = 10 fs) light pulses at up to kilohertz repetition rates with unprecedented coherence properties and span a broad wavelength regime from soft (∼10 eV) to hard X-ray energies (∼15 keV). They thus enable a whole suite of novel experiments in molecular physics and chemistry: Inspecting radiation-induced reactions in cold molecular ions provides unprecedented insight into the photochemistry of interstellar clouds and upper planetary atmospheres; double core-hole photoelectron spectroscopy offers enhanced sensitivity for chemical analysis; the dynamics of highly excited molecular states, pumped by vacuum ultraviolet pulses, can be inspected; and vacuum ultraviolet or X-ray probe pulses generally hold the promise to trace chemical reactions along an entire reaction coordinate with atomic spatial and temporal resolution. This review intends to provide a first overview on upcoming possibilities, emerging technologies, pioneering results, and future perspectives in this exciting field.