N. Berrah

Attosecond response of molecules to impulsive ionization

Taran Driver, Zhaoheng Guo, Erik Isele, Gilbert Grell et autres

us, es, de, gb, cz, ch, jp (code pays fourni par la source)

trXAS Measurement Outer Products and Example Computer Code

Taran Driver, Zhaoheng Guo, Erik Isele, Gilbert Grell et autres

This item contains two H5 files. The H5 first file, "para-aminophenol_trXAS_outer_products.h5", is an H5 file which contains 3 fields: "AtA_array", "Atb_array" and "gmd_centers". "AtA_array" and "Atb_array" are the outer products of the photon spectrum with itself and the the photon spectrum with …

trXAS Measurement Outer Products and Example Computer Code

Taran Driver, Zhaoheng Guo, Erik Isele, Gilbert Grell et autres

This item contains two H5 files. The H5 first file, "para-aminophenol_trXAS_outer_products.h5", is an H5 file which contains 3 fields: "AtA_array", "Atb_array" and "gmd_centers". "AtA_array" and "Atb_array" are the outer products of the photon spectrum with itself and the the photon spectrum with …

Time-Resolved Laser-Induced Ring-Opening and Dissociation Dynamics in Bromothiophene Isomers

Noah Frese, Maximillian Thomas, Debadarshini Mishra, Aaron LaForge et autres

Photoinduced molecular ring-opening reactions play a critical role in many natural chemical processes; however, there are pending questions regarding the fundamental mechanisms that govern these transformations. Furthermore, the understanding of ring-opening reactions has an important impact on optoelectronic and molecular control applications. …

us (code pays fourni par la source)

Visualizing the strong field–induced molecular breakup of C 60 via x-ray diffraction

Kirsten Schnorr, Sven Augustin, Ulf Saalmann, Georg Schmid et autres

Laser-driven dynamics in polyatomic molecules poses a complex many-body problem. Understanding intense light-matter interaction is crucial for steering intramolecular quantum dynamical processes. Here, we record time-resolved x-ray diffraction images of [Formula: see text] molecules during and after their interaction with intense near-infrared …

ch, de, us, be, jp (code pays fourni par la source)

Photodissociation Pathways of Methanol: Dissociation, Roaming, and Migration

Noah Frese, Debadarshini Mishra, Clark R. Bray, Aaron LaForge et autres

In this joint experimental and theoretical study, we examine the two-body photodissociation pathways induced in deuterated methanol by both single and double laser pulses. The measurements were conducted using IR pump–IR probe spectroscopy paired with the coincident momentum imaging technique. Our work …

us (code pays fourni par la source)

Attosecond X-ray sources, methods, and applications at present and future free-electron lasers: tutorial

N. Berrah, James Cryan, River Robles, Taran Driver et autres

The timescale for electrons to break interatomic bonds during photoinduced physical or biochemical processes such as vision or photosynthesis is femtoseconds or less. For this reason, electron dynamics in a chemical bond must be viewed with attosecond pulses, but until now, laboratory …

us (code pays fourni par la source)

Visualizing the strong field–induced molecular breakup of C60 via x-ray diffraction

Kirsten Schnorr, Sven Augustin, Ulf Saalmann, Georg Schmid et autres

Laser-driven dynamics in polyatomic molecules poses a complex many-body problem. Understanding intense light-matter interaction is crucial for steering intramolecular quantum dynamical processes. Here, we record time-resolved x-ray diffraction images of molecules during and after their interaction with intense near-infrared fields, giving direct …

High-power femtosecond molecular broadening and the effects of ro-vibrational coupling

Kevin Watson, Tobias Saule, Maksym Ivanov, Bruno E. Schmidt et autres

Scaling spectral broadening to higher pulse energies and average powers is a critical step in ultrafast science, especially for narrowband Yb-based solid state lasers, which have become the new state-of-the-art. Despite their high nonlinearity, molecular gases as a broadening medium inside hollow-core …

ca, us (code pays fourni par la source)

Design and performance of a magnetic bottle electron spectrometer for high-energy photoelectron spectroscopy

Kurtis Borne, Jordan T. O’Neal, Jun Wang, Erik Isele et autres

We describe the design and performance of a magnetic bottle electron spectrometer (MBES) for high-energy electron spectroscopy. Our design features a 2 m long electron drift tube and electrostatic retardation lens, achieving sub-electronvolt (eV) electron kinetic energy resolution for high energy (several …

us (code pays fourni par la source)

Attosecond Coherent Electron Motion in a Photoionized Aromatic Molecule

Taran Driver, Zhaoheng Guo, Erik Isele, Gilbert Grell et autres

In molecular systems, the ultrafast motion of electrons initiates the process of chemical change. Tracking this electronic motion across molecules requires coupling attosecond time resolution to atomic-scale spatial sensitivity. In this work, we employ a pair of attosecond x-ray pulses from an …

Attosecond impulsive stimulated X-ray Raman scattering in liquid water

Oliver Alexander, Felix Egun, Laura Rego, Ana Martinez Gutierrez et autres

We report the measurement of impulsive stimulated x-ray Raman scattering in neutral liquid water. An attosecond pulse drives the excitations of an electronic wavepacket in water molecules. The process comprises two steps: a transition to core-excited states near the oxygen atoms accompanied …

gb, es, us, de (code pays fourni par la source)