scholarly journals Transition state region in the A-Band photodissociation of allyl iodide—A femtosecond extreme ultraviolet transient absorption study

2016 ◽  
Vol 144 (12) ◽  
pp. 124311 ◽  
Author(s):  
Aditi Bhattacherjee ◽  
Andrew R. Attar ◽  
Stephen R. Leone
Keyword(s):  
Transition State ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Absorption Study ◽  
State Region ◽  
Allyl Iodide

scholarly journals Measuring the frequency chirp of extreme-ultraviolet free-electron laser pulses by transient absorption spectroscopy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Thomas Ding ◽  
Marc Rebholz ◽  
Lennart Aufleger ◽  
Maximilian Hartmann ◽  
Veit Stooß ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Ultrashort Pulses ◽  
Laser Pulses ◽  
Transient Absorption Spectroscopy ◽  
Energy Structure ◽  
Frequency Chirp

AbstractHigh-intensity ultrashort pulses at extreme ultraviolet (XUV) and x-ray photon energies, delivered by state-of-the-art free-electron lasers (FELs), are revolutionizing the field of ultrafast spectroscopy. For crossing the next frontiers of research, precise, reliable and practical photonic tools for the spectro-temporal characterization of the pulses are becoming steadily more important. Here, we experimentally demonstrate a technique for the direct measurement of the frequency chirp of extreme-ultraviolet free-electron laser pulses based on fundamental nonlinear optics. It is implemented in XUV-only pump-probe transient-absorption geometry and provides in-situ information on the time-energy structure of FEL pulses. Using a rate-equation model for the time-dependent absorbance changes of an ionized neon target, we show how the frequency chirp can be directly extracted and quantified from measured data. Since the method does not rely on an additional external field, we expect a widespread implementation at FELs benefiting multiple science fields by in-situ on-target measurement and optimization of FEL-pulse properties.

Excited state relaxation paths in 9,9′-bianthryl and 9-carbazolyl-anthracene: a sub-ps transient absorption study

2000 ◽  
Vol 253 (2-3) ◽  
pp. 339-349 ◽  
Author(s):  
Martin Jurczok ◽  
Pascal Plaza ◽  
Monique M Martin ◽  
Yves H Meyer ◽  
Wolfgang Rettig
Keyword(s):  
Excited State ◽  
Transient Absorption ◽  
Absorption Study

High-Mobility Ions in Cyclohexane. A Transient Absorption Study†

1996 ◽  
Vol 100 (17) ◽  
pp. 7237-7245 ◽  
Author(s):  
I. A. Shkrob ◽  
M. C. Sauer ◽  
A. D. Trifunac
Keyword(s):  
Transient Absorption ◽  
High Mobility ◽  
Absorption Study
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