150 citations · 880 across the 35 of their papers we have counts for
35 papers
Radiative stabilization of the indenyl cation: Recurrent fluorescence in a closed-shell polycyclic aromatic hydrocarbon
James N. Bull, Arun Subramani, Chang Liu +5
Several small polycyclic aromatic hydrocarbons (PAHs) with closed-shell electronic structure have been identified in the cold, dark environment Taurus Molecular Cloud-1. We measure…
Dissociation and radiative stabilization of the indene cation: The nature of the C-H bond and astrochemical implications
M. H. Stockett, A. Subramani, C. Liu +5
Indene (CH) is the only polycyclic pure hydrocarbon identified in the interstellar medium to date, with an observed abundance orders of magnitude higher than predicted by a…
Mutual neutralization of C and C ions: Excitation energies and state-selective rate coefficients
Michael Gatchell, Raka Paul, MingChao Ji +6
Context: Mutual neutralization between cations and anions play an important role in determining the charge-balance in certain astrophysical environments. However, empirical data fo…
Cooling of gold cluster anions, Au, , in a cryogenic ion-beam storage ring
Klavs Hansen, Tian Weihao, Emma K. Anderson +9
We have measured the spontaneous and photo-induced decays of anionic gold clusters, Au, with sizes ranging from to 13, and 15. After production in a sputter ion sourc…
Precision measurements on Si-
J. Karls, H. Cederquist, N. D. Gibson +12
High-precision measurements of the electron affinities (EA) of the three stable isotopes of silicon, Si, Si and Si, have been performed at the cryogenic electr…
PDRs4All VIII: Mid-IR emission line inventory of the Orion Bar
Dries Van De Putte, Raphael Meshaka, Boris Trahin +135
Mid-infrared emission features probe the properties of ionized gas, and hot or warm molecular gas. The Orion Bar is a frequently studied photodissociation region (PDR) containing l…
A far-ultraviolet-driven photoevaporation flow observed in a protoplanetary disk
Olivier Berné, Emilie Habart, Els Peeters +143
Most low-mass stars form in stellar clusters that also contain massive stars, which are sources of far-ultraviolet (FUV) radiation. Theoretical models predict that this FUV radiati…
Structures and stabilities of mixed clusters of fullerene and coronene molecules
Naemi Florin, Henning Zettergren, Michael Gatchell
We have performed molecular dynamics simulations on the formation of mixed molecular clusters of buckminsterfullerene and coronene, $(\mathrm{C}_{24}\mathrm{H}_{12})_n(\mathrm{C}_{…
Bond breaking and making in mixed clusters of fullerene and coronene molecules following keV-ion impact
Naemi Florin, Alicja Domaracka, Patrick Rousseau +2
We have performed classical molecular dynamics simulations of 3 keV Ar + collisions where and…
Stability of C Knockout Fragments from Femtoseconds to Infinity
Michael Gatchell, Naemi Florin, Suvasthika Indrajith +9
We have studied the stability of C anions as a function of time, from their formation on femtosecond timescales to their stabilization on second timescales and beyond, using…
PDRs4All III: JWST's NIR spectroscopic view of the Orion Bar
Els Peeters, Emilie Habart, Olivier Berne +135
(Abridged) We investigate the impact of radiative feedback from massive stars on their natal cloud and focus on the transition from the HII region to the atomic PDR (crossing the i…
PDRs4All IV. An embarrassment of riches: Aromatic infrared bands in the Orion Bar
Ryan Chown, Ameek Sidhu, Els Peeters +136
(Abridged) Mid-infrared observations of photodissociation regions (PDRs) are dominated by strong emission features called aromatic infrared bands (AIBs). The most prominent AIBs ar…
PDRs4All II: JWST's NIR and MIR imaging view of the Orion Nebula
Emilie Habart, Els Peeters, Olivier Berné +139
The JWST has captured the most detailed and sharpest infrared images ever taken of the inner region of the Orion Nebula, the nearest massive star formation region, and a prototypic…
The Largest Fullerene
Michael Gatchell, Henning Zettergren, Klavs Hansen
Fullerenes are lowest energy structures for gas phase all-carbon particles for a range of sizes, but graphite remains the lowest energy allotrope of bulk carbon. This implies that…
Resilience of small PAHs in interstellar clouds: Efficient stabilization of cyanonaphthalene by fast radiative cooling
Mark H. Stockett, James N. Bull, Henrik Cederquist +6
After decades of speculation and searching, astronomers have recently identified specific Polycyclic Aromatic Hydrocarbons (PAHs) in space. Remarkably, the observed abundance of cy…
PDRs4All: A JWST Early Release Science Program on radiative feedback from massive stars
Olivier Berné, Émilie Habart, Els Peeters +134
Massive stars disrupt their natal molecular cloud material through radiative and mechanical feedback processes. These processes have profound effects on the evolution of interstell…
Mutual neutralisation in Li+H/D and Na+H/D collisions: Implications of experimental results for non-LTE modelling of stellar spectra
Paul S. Barklem, Anish M. Amarsi, Jon Grumer +6
Advances in merged-beams instruments have allowed experimental studies of the mutual neutralisation (MN) processes in collisions of both Li and Na ions with D at energi…
Spontaneous electron emission from hot silver dimer anions: Breakdown of the Born-Oppenheimer approximation
E. K. Anderson, A. F. Schmidt-May, P. K. Najeeb +8
We report the first experimental evidence of spontaneous electron emission from a homonuclear dimer anion through direct measurements of $\rm{Ag}_2^- \rightarrow \rm{Ag}_2 + \rm{e}…
Ultraslow radiative cooling of C ()
James N. Bull, Michael S. Scholz, Eduardo Carrascosa +8
Ultraslow radiative cooling lifetimes and adiabatic detachment energies for three astrochemically relevant anions, C (), are measured using the Double ElectroStatic Io…
Decays of excited silver cluster anions Ag, to , in DESIREE
E. K. Anderson, M. Kamińska, K. C. Chartkunchand +6
Spontaneous decays of small, hot silver cluster anions Ag, have been studied using one of the rings of the Double ElectroStatic Ion Ring ExpEriment (DESIREE). Observa…
DESIREE electrospray ion source test bench and setup for Collision Induced Dissociation experiments
N. de Ruette, M. Wolf, L. Giacomozzi +7
We give a detailed description of an electrospray ion source test bench and a single-pass setup for ion fragmentation studies at the DESIREE infrastructure at Stockholm University.…
Hydrogenated pyrene: Statistical single-carbon loss below the knockout threshold
Michael Wolf, Linda Giacomozzi, Michael Gatchell +5
An ongoing discussion revolves around the question of what effect hydrogenation has on carbon backbone fragmentation in Polycyclic Aromatic Hydrocarbons (PAHs). In order to shed mo…
Knockout driven fragmentation of porphyrins
Linda Giacomozzi, Michael Gatchell, Nathalie de Ruette +5
We have studied collisions between tetraphenylporphyrin cations and He or Ne at center-of-mass energies in the 50-110 eV range. The experimental results were interpreted in view of…
Spontaneous decay of small copper cluster anions Cu, on long time scales
K. Hansen, M. H. Stockett, M. Kaminska +8
We have measured the spontaneous neutral particle emission from copper cluster anions (Cu, ) stored at cryogenic temperatures in one of the electrostatic ion storage r…