Daniel Slaughter
YOU?
Author Swipe
View article: Proton-transfer mediated autoionization: A new source of low-energy electrons in water dimers
Proton-transfer mediated autoionization: A new source of low-energy electrons in water dimers Open
Ionizing radiation can trigger ultrafast proton transfer, a central mechanism in many chemical and biological functions, that in turn can enhance or suppress electron relaxation processes and consequently cause abrupt changes in the reacti…
View article: The polarized-signal density matrix: A practical way to recover molecular frame information from isotropic samples
The polarized-signal density matrix: A practical way to recover molecular frame information from isotropic samples Open
We present a novel approach to model ultrafast time-dependent nonlinear optical polarization sensitive signals emitted from randomly oriented molecules. By projecting the laboratory-frame analyzer polarization axis into the molecular-frame…
View article: Interplay between ultrafast electronic and librational dynamics in liquid nitrobenzene probed with two-color four-wave mixing
Interplay between ultrafast electronic and librational dynamics in liquid nitrobenzene probed with two-color four-wave mixing Open
We present an experimental and theoretical study of the interplay between ultrafast electron dynamics and librational dynamics in liquid nitrobenzene. A femtosecond ultraviolet pulse and two femtosecond near infrared pulses interact with n…
View article: State selectivity in core ionization of methane
State selectivity in core ionization of methane Open
A clear experimental signature of the population of the lowest triplet state T13 of the methane dication is identified in a photoionization experiment. This state is populated only in valence ionization and is absent when the dication is f…
View article: Fragmentation dynamics through geometrical distortion in low-energy electron attachment to carbon disulfide
Fragmentation dynamics through geometrical distortion in low-energy electron attachment to carbon disulfide Open
The dissociation dynamics of dissociative electron attachment to carbon disulfide is studied using the velocity map imaging technique. Ion yields of the S-and CS-fragments are measured as a function of incident electron energy between 2 an…
View article: Attosecond Coherent Electron Motion in a Photoionized Aromatic Molecule
Attosecond Coherent Electron Motion in a Photoionized Aromatic Molecule Open
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 wo…
View article: Dynamics of hydride anion and acetyloxyl radical production by electron attachment to acetic acid
Dynamics of hydride anion and acetyloxyl radical production by electron attachment to acetic acid Open
We investigate the dynamics and site-selectivity in the dissociation of transient anions formed upon attachment of low energy electrons to acetic acid by anion fragment momentum imaging experiments. The resonances at 6.7 and 7.7 eV are con…
View article: Tracking ultrafast non-adiabatic dissociation dynamics of the deuterated water dication molecule
Tracking ultrafast non-adiabatic dissociation dynamics of the deuterated water dication molecule Open
We applied reaction microscopy to elucidate fast non-adiabatic dissociation dynamics of deuterated water molecules after direct photo-double ionization at 61 eV with synchrotron radiation. For the very rare D+ + O+ + D breakup channel, the…
View article: Experimental Demonstration of Attosecond Pump-Probe Spectroscopy with an X-ray Free-Electron Laser
Experimental Demonstration of Attosecond Pump-Probe Spectroscopy with an X-ray Free-Electron Laser Open
Pump-probe experiments with sub-femtosecond resolution are the key to understanding electronic dynamics in quantum systems. Here we demonstrate the generation and control of sub-femtosecond pulse pairs from a two-colour X-ray free-electron…
View article: Contrasting Dynamics in Isoelectronic Anions Formed by Electron Attachment
Contrasting Dynamics in Isoelectronic Anions Formed by Electron Attachment Open
Cyanogen NCCN and cyanoacetylene HCCCN are isoelectronic molecules, and as such, they have many similar properties. We focus on the bond cleavage in these induced by the dissociative electron attachment. In both molecules, resonant electro…
View article: Dissociative electron attachment to carbon tetrachloride probed by velocity map imaging
Dissociative electron attachment to carbon tetrachloride probed by velocity map imaging Open
Bond-breaking in CCl 4 via dissociative electron attachment (DEA) has been studied using a velocity map imaging (VMI) spectrometer.
View article: Techno-economic and carbon dioxide emission assessment of carbon black production
Techno-economic and carbon dioxide emission assessment of carbon black production Open
The over 15 million metric tonnes of carbon black produced annually emit carbon dioxide in the range of 29–79 million metric tonnes each year. With the renaissance of carbon black in many new renewable energy applications as well as the gr…
View article: Dynamics of resonant low-energy electron attachment to ethanol-producing hydroxide anions
Dynamics of resonant low-energy electron attachment to ethanol-producing hydroxide anions Open
Here, the dynamics of dissociative electron attachment to ethanol is experimentally investigated at the Feshbach resonance formed with incident electron energies near 9.5 eV. Highly differential laboratory-frame momentum distributions of O…
View article: Relativistic ultrafast electron diffraction at high repetition rates
Relativistic ultrafast electron diffraction at high repetition rates Open
The ability to resolve the dynamics of matter on its native temporal and spatial scales constitutes a key challenge and convergent theme across chemistry, biology, and materials science. The last couple of decades have witnessed ultrafast …
View article: Efficiency of charge transfer in changing the dissociation dynamics of OD+ transients formed after the photo-fragmentation of D2O
Efficiency of charge transfer in changing the dissociation dynamics of OD+ transients formed after the photo-fragmentation of D2O Open
We present an investigation of the relaxation dynamics of deuterated water molecules after direct photo-double ionization at 61 eV. We focus on the very rare D+ + O+ + D reaction channel in which the sequential fragmentation mechanisms wer…
View article: Mass-selected ion–molecule cluster beam apparatus for ultrafast photofragmentation studies
Mass-selected ion–molecule cluster beam apparatus for ultrafast photofragmentation studies Open
We describe an apparatus for investigating the excited-state dissociation dynamics of mass-selected ion–molecule clusters by mass-resolving and detecting photofragment-ions and neutrals, in coincidence, using an ultrafast laser operating a…
View article: Electron Scattering from 1-Methyl-5-Nitroimidazole: Cross-Sections for Modeling Electron Transport through Potential Radiosensitizers
Electron Scattering from 1-Methyl-5-Nitroimidazole: Cross-Sections for Modeling Electron Transport through Potential Radiosensitizers Open
In this study, we present a complete set of electron scattering cross-sections from 1-Methyl-5-Nitroimidazole (1M5NI) molecules for impact energies ranging from 0.1 to 1000 eV. This information is relevant to evaluate the potential role of…
View article: Relativistic ultrafast electron diffraction at high repetition rates
Relativistic ultrafast electron diffraction at high repetition rates Open
The ability to resolve the dynamics of matter on its native temporal and spatial scales constitutes a key challenge and convergent theme across chemistry, biology, and materials science. The last couple of decades have witnessed ultrafast …
View article: Mass-selected Ion-molecule Cluster Beam Apparatus for Ultrafast Photofragmentation Studies
Mass-selected Ion-molecule Cluster Beam Apparatus for Ultrafast Photofragmentation Studies Open
We describe an apparatus to study the fragmentation of ion-molecule clusters triggered by laser excitation and transfer of an electron from the iodide to the neutral molecule. The apparatus comprises a source to generate ion-molecule clust…
View article: Atomic autoionization in the photo-dissociation of super-excited deuterated water molecules fragmenting into D<sup>+</sup> + O<sup>+</sup> + D
Atomic autoionization in the photo-dissociation of super-excited deuterated water molecules fragmenting into D<sup>+</sup> + O<sup>+</sup> + D Open
Creation of a super-excited radical water cation results in a long-lived excited oxygen fragment that can act as a destructive carrier and initiate secondary reactions such as breakup of DNA strands – a key radiation damage mechanism.
View article: Strongly coupled intermediate electronic states in one-color two-photon single valence ionization of O2
Strongly coupled intermediate electronic states in one-color two-photon single valence ionization of O2 Open
We present an experimental and theoretical energy- and angle-resolved investigation on the non-dissociative photoionization dynamics of near-resonant, one-color, two-photon, single valence ionization of neutral O2 molecules. Using 9.3 eV f…
View article: Electron and Positron Scattering Cross Sections from CO<sub>2</sub>: A Comparative Study over a Broad Energy Range (0.1–5000 eV)
Electron and Positron Scattering Cross Sections from CO<sub>2</sub>: A Comparative Study over a Broad Energy Range (0.1–5000 eV) Open
In this Review, we present a comparative study between electron and positron scattering cross sections from CO2 molecules over a broad impact energy range (0.1-5000 eV). For electron scattering, new total electron scattering cross sections…
View article: Capturing Ultrafast Electron Driven Chemical Reactions in Molecules
Capturing Ultrafast Electron Driven Chemical Reactions in Molecules Open
The goals of this project are to develop experimental tools to investigate the dynamics of dissociative electron attachment (DEA) reactions in real time. In a DEA reaction, the attachment of a low energy electron to a molecule results in b…
View article: SILIA: software implementation of a multi-channel, multi-frequency lock-in amplifier for spectroscopy and imaging applications
SILIA: software implementation of a multi-channel, multi-frequency lock-in amplifier for spectroscopy and imaging applications Open
We describe a software implementation of a multi-channel, multi-frequency Lock-in Amplifier (SILIA) to extract modulated signals from noisy data distributed over multiple channels of arbitrary number and size. This software implementation …
View article: Nonequilibrium dissociative dynamics of D2 in two-color, few-photon excitation and ionization
Nonequilibrium dissociative dynamics of D2 in two-color, few-photon excitation and ionization Open
D2 molecules, excited by linearly cross-polarized femtosecond extreme ultraviolet (XUV) and near-infrared (NIR) light pulses, reveal highly structured D+ ion fragment momenta and angular distributions that originate from two different four…
View article: SOFTWARE IMPLEMENTATION OF A MULTI-CHANNEL, MULTI-FREQUENCY LOCK-IN AMPLIFIER
SOFTWARE IMPLEMENTATION OF A MULTI-CHANNEL, MULTI-FREQUENCY LOCK-IN AMPLIFIER Open
Weak emission signals are usually measured and analyzed with one or more sensitive detectors, such as a photomultiplier tube, to obtain sufficient signal from fluorescent samples. Here we demonstrate the measurement of fluorescence from so…