247 citations · 745 across the 11 of their papers we have counts for
12 papers
Deciphering the internal conversion and triplet formation in thymine via time-resolved multi-center X-ray photoelectron spectroscopy
Xiaojun Wang, Woojin Park, Dennis Mayer +12
The photostability of DNA nucleobases relies on ultrafast nonradiative relaxation following ultraviolet excitation. In thymine, the competition between internal conversion (IC) and…
Ultrafast photo-ion probing of the relaxation dynamics in 2-thiouracil
Matthew S. Robinson, Mario Niebuhr, Markus Gühr
In this work we investigate the relaxation processes of 2-thiouracil after UV photoexcitation to the S2 state through the use of ultrafast, single-color, pump-probe UV/UV spectrosc…
Transient Resonant Auger-Meitner Spectra of Photoexcited Thymine
Thomas J. A. Wolf, Alexander C. Paul, Sarai D. Folkestad +15
We present the first investigation of excited state dynamics by resonant Auger-Meitner spectroscopy (also known as resonant Auger spectroscopy) using the nucleobase thymine as an e…
Imaging the Photochemical Ring-Opening of 1,3-Cyclohexadiene by Ultrafast Electron Diffraction
T. J. A. Wolf, D. M. Sanchez, J. Yang +20
The ultrafast photoinduced ring-opening of 1,3-cyclohexadiene constitutes a textbook example of electrocyclic reactions in organic chemistry and a model for photobiological reactio…
Probing ultrafast ππ*/nπ* internal conversion in organic chromophores via K-edge resonant absorption
T. J. A. Wolf, R. H. Myhre, J. P. Cryan +21
Organic chromophores with heteroatoms possess an important excited state relaxation channel from an optically allowed ππ* to a dark nπ*state. We exploit the element and site specif…
Extreme ultraviolet spectrometer based on a transmission electron microscopy grid
Emily Sistrunk, Markus Gühr
We performed extreme ultraviolet spectroscopy using an 80 lines/mm TEM mesh as dispersive element. We present the usefulness of this instrument for dispersing a high harmonic spect…
Extreme Ultraviolet Transient Grating Spectroscopy of Vanadium Dioxide
Emily Sistrunk, Jakob Grilj, Jaewoo Jeong +5
Nonlinear spectroscopy in the extreme ultraviolet (EUV) and soft x-ray spectral range offers the opportunity for element selective probing of ultrafast dynamics using core-valence…
Femtosecond photoelectron and photoion spectrometer with vacuum ultraviolet probe pulses
Markus Koch, Thomas J. A. Wolf, Jakob Grilj +2
We describe a setup to study ultrafast dynamics in gas-phase molecules using time-resolved photoelectron and photoion spectroscopy. The vacuum ultraviolet (VUV) probe pulses are ge…
A beamline for time-resolved extreme ultraviolet and soft x-ray spectroscopy
Jakob Grilj, Emily Sistrunk, Markus Koch +1
High harmonic generation is a convenient way to obtain extreme ultraviolet light from table-top laser systems and the experimental tools to exploit this simple and powerful light s…
A low-cost mirror mount control system for optics setups
Maithreyi Gopalakrishnan, Markus Gühr
We describe a flexible, simple to build, low-cost, and computer-controlled optical mirror actuator system we developed for undergraduate research laboratories. Geared motors for ho…
Double core hole production in N2: Beating the Auger clock
L. Fang, M. Hoener, O. Gessner +16
We investigate the creation of double K-shell holes in N2 molecules via sequential absorption of two photons on a timescale shorter than the core-hole lifetime by using intense x-r…
Strong field ionization to multiple electronic states in water
Joe P. Farrell, Simon Petretti, Johann Förster +7
High harmonic spectra show that laser-induced strong field ionization of water has a significant contribution from an inner-valence orbital. Our experiment uses the ratio of H2O an…