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X‐ray emission from CsCl aqueous solutions when irradiated by intense femtosecond laser pulses and its application to time‐resolved XAFS measurement of I − in aqueous solution
Author(s) -
Hatanaka Koji,
Fukumura Hiroshi
Publication year - 2012
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.2404
Subject(s) - irradiation , aqueous solution , laser , femtosecond , ionization , analytical chemistry (journal) , emission spectrum , chemistry , x ray , absorption (acoustics) , x ray absorption fine structure , spectroscopy , materials science , spectral line , optics , ion , physics , organic chemistry , chromatography , quantum mechanics , astronomy , nuclear physics
This paper reviews X‐ray emission from electrolyte aqueous solutions when irradiated by intense femtosecond laser pulses in air. First, some examples of X‐ray emission spectra were shown when alkali halide aqueous solutions such as CsCl are used as samples. Dependence of X‐ray emission spectra on laser intensity, solute atomic numbers, and solute concentrations are discussed on the basis of multiphoton ionization, resonance absorption, and so on. Laser chirp effects on X‐ray emission were also discussed for understanding mechanisms occurring during a single laser pulse. X‐ray intensity increase up to 10 3 –10 4 times with prepulse irradiation was also introduced, and the mechanism of X‐ray intensity increase was discussed from the viewpoint of laser ablation induced by the prepulse irradiation. Finally, preliminary results of time‐resolved X‐ray absorption fine spectroscopy using potassium iodide aqueous solution were presented. Copyright © 2012 John Wiley & Sons, Ltd.