Multiparticle cumulant mapping for Coulomb explosion imaging

C Cheng, LJ Frasinski, G Moğol, F Allum, AJ Howard… - Physical Review Letters, 2023 - APS
We extend covariance velocity map ion imaging to four particles, establishing cumulant
mapping and allowing for measurements that provide insights usually associated with …

Disentangling sequential and concerted fragmentations of molecular polycations with covariant native frame analysis

JW McManus, T Walmsley, K Nagaya… - Physical Chemistry …, 2022 - pubs.rsc.org
We present results from an experimental ion imaging study into the fragmentation dynamics
of 1-iodopropane and 2-iodopropane following interaction with extreme ultraviolet intense …

X-ray induced Coulomb explosion imaging of transient excited-state structural rearrangements in CS2

J Unwin, F Allum, M Britton, I Gabalski… - Communications …, 2023 - nature.com
Structural imaging of transient excited-state species is a key goal of molecular physics,
promising to unveil rich information about the dynamics underpinning photochemical …

Direct momentum imaging of charge transfer following site-selective ionization

F Allum, Y Kumagai, K Nagaya, J Harries, H Iwayama… - Physical Review A, 2023 - APS
We study ultrafast charge rearrangement in dissociating 2-iodopropane (2-C 3 H 7 I) using
site-selective core ionization at the iodine atom. Clear signatures of electron transfer …

An Orbitrap/time-of-flight mass spectrometer for photofragment ion imaging and high-resolution mass analysis of native macromolecular assemblies

A Mathew, F Giskes, A Lekkas, JF Greisch… - Journal of the …, 2023 - ACS Publications
We discuss the design, development, and evaluation of an Orbitrap/time-of-flight (TOF) mass
spectrometry (MS)-based instrument with integrated UV photodissociation (UVPD) and …

Filming enhanced ionization in an ultrafast triatomic slingshot

AJ Howard, M Britton, ZL Streeter, C Cheng… - Communications …, 2023 - nature.com
Filming atomic motion within molecules is an active pursuit of molecular physics and
quantum chemistry. A promising method is laser-induced Coulomb Explosion Imaging (CEI) …

Multiparticle cumulant mapping for Coulomb explosion imaging: Calculations and algorithm

C Cheng, LJ Frasinski, G Moğol, F Allum, AJ Howard… - Physical Review A, 2024 - APS
We present a versatile cumulant mapping algorithm for analyzing correlated particle
emission, offering insights into complex electronic and nuclear dynamics. Recently, we have …

Direct observation of entangled electronic-nuclear wave packets

G Moğol, B Kaufman, T Weinacht, C Cheng… - Physical Review …, 2024 - APS
We present momentum resolved covariance measurements of entangled electronic-nuclear
wave packets created and probed with octave spanning phaselocked ultrafast pulses. We …

Time-resolved imaging of high mass proteins and metastable fragments using matrix-assisted laser desorption/ionization, axial time-of-flight mass spectrometry, and …

A Mathew, JD Keelor, GB Eijkel, IGM Anthony… - Analytical …, 2022 - ACS Publications
The Timepix (TPX) is a position-and time-sensitive pixelated charge detector that can be
coupled with time-of-flight mass spectrometry (TOF MS) in combination with microchannel …

Cumulant mapping as the basis of multi-dimensional spectrometry

LJ Frasinski - Physical Chemistry Chemical Physics, 2022 - pubs.rsc.org
Cumulant mapping employs a statistical reconstruction of the whole by sampling its parts.
The theory developed in this work formalises and extends ad hoc methods of 'multi-fold'or …