Averell Gatton
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View article: Attosecond coherent electron motion in Auger-Meitner decay
Attosecond coherent electron motion in Auger-Meitner decay Open
In quantum systems, coherent superpositions of electronic states evolve on ultrafast time scales (few femtoseconds to attoseconds; 1 attosecond = 0.001 femtoseconds = 10 −18 seconds), leading to a time-dependent charge density. Here we per…
View article: Investigating charge-up and fragmentation dynamics of oxygen molecules after interaction with strong X-ray free-electron laser pulses
Investigating charge-up and fragmentation dynamics of oxygen molecules after interaction with strong X-ray free-electron laser pulses Open
The X-ray-induced charge-up and fragmentation process of a small molecule is examined in great detail by measuring the molecular-frame photoelectron interference pattern in conjunction with other observables in coincidence.
View article: Ultrafast temporal evolution of interatomic Coulombic decay in NeKr dimers
Ultrafast temporal evolution of interatomic Coulombic decay in NeKr dimers Open
We investigate the time-resolved dynamics of interatomic Coulombic decay in NeKr dimers after neon inner-valence photoionization using a synchrotron light source.
View article: Multi-resolution electron spectrometer array for future free-electron laser experiments
Multi-resolution electron spectrometer array for future free-electron laser experiments Open
The design of an angular array of electron time-of-flight (eToF) spectrometers is reported, intended for non-invasive spectral, temporal, and polarization characterization of single shots of high-repetition rate, quasi-continuous, short-wa…
View article: Multi-Resolution Electron Spectrometer Array for Future Free-Electron\n Laser Experiments
Multi-Resolution Electron Spectrometer Array for Future Free-Electron\n Laser Experiments Open
We report the design of an angular array of electron Time-of-Flight (eToF)\nspectrometers intended for non-invasive spectral, temporal, and polarization\ncharacterization of single shots of high-repetition rate, quasi-continuous,\nshort-wa…
View article: Photoelectron Diffraction Imaging of a Molecular Breakup Using an X-Ray Free-Electron Laser
Photoelectron Diffraction Imaging of a Molecular Breakup Using an X-Ray Free-Electron Laser Open
© 2020 authors. Published by the American Physical Society. A central motivation for the development of x-ray free-electron lasers has been the prospect of time-resolved single-molecule imaging with atomic resolution. Here, we show that x-…
View article: Tracing inter-Coulombic decay of molecular dimers
Tracing inter-Coulombic decay of molecular dimers Open
Synopsis We have conducted an experimental study on the photo double ionization (PDI) of carbon dioxide dimers and oxygen dimers, while focusing on the dissociation dynamics upon single photon absorption. The results in terms of the kineti…
View article: Tracing intermolecular Coulombic decay of carbon-dioxide dimers and oxygen dimers after valence photoionization
Tracing intermolecular Coulombic decay of carbon-dioxide dimers and oxygen dimers after valence photoionization Open
We have conducted an experimental study on the photo double ionization (PDI) of carbon-dioxide dimers at photon energies of 37 and 55 eV and oxygen dimers at photon energies of 38, 41.5, and 46 eV, while focusing on the dissociation dynami…
View article: Dissociation dynamics of the water dication following one-photon double ionization. II. Experiment
Dissociation dynamics of the water dication following one-photon double ionization. II. Experiment Open
We demonstrate here the use of cold target recoil ion momentum spectroscopy to perform state-selective measurements of the dissociative channels following single-photon double-ionization of ${\\mathrm{H}}_{2}\\mathrm{O}$. The two dominant …
View article: Resonance signatures in the body-frame valence photoionization of CF<sub>4</sub>
Resonance signatures in the body-frame valence photoionization of CF<sub>4</sub> Open
Photoionization of the 4t2 orbital of CF4 shows overlapping resonances close to threshold, leading to a striking inversion of the photoelectron angular distribution when viewed in the body-frame.
View article: Molecular frame photoelectron angular distributions for core ionization of ethane, carbon tetrafluoride and 1,1-difluoroethylene
Molecular frame photoelectron angular distributions for core ionization of ethane, carbon tetrafluoride and 1,1-difluoroethylene Open
Molecular frame photoelectron angular distributions (MFPADs) are measured in electron-ion momentum imaging experiments and compared with complex Kohn variational calculations for carbon K-shell ionization of carbon tetrafluoride (CF4), eth…
View article: A molecular movie of Interatomic Coulombic Decay in NeKr
A molecular movie of Interatomic Coulombic Decay in NeKr Open
Interatomic Coulombic Decay in mixed NeKr dimers has been measured time-resolved and the nuclear dynamics of the decay have been investigated.
View article: Dissociation Dynamics of Doubly Ionized Water Using 57 eV Photons
Dissociation Dynamics of Doubly Ionized Water Using 57 eV Photons Open
We have measured the photoelectron emission and dissociation of water in the gas phase following double photoionization by a 57 eV photon. The momenta of the resulting dication ion fragments and electrons were measured in coincidence with …
View article: Auger decay and subsequent fragmentation pathways of ethylene following<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>K</mml:mi></mml:math>-shell ionization
Auger decay and subsequent fragmentation pathways of ethylene following-shell ionization Open
The fragmentation pathways and dynamics of ethylene molecules after core ionization are explored using coincident measurements of the Auger electron and fragment ions by employing the cold target recoil-ion momentum spectroscopy method. Th…