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Publications (15)

physics.atm-clus2018

Decays of excited silver cluster anions Ag $_{n}$ , $n = 4$ to $7$ , in DESIREE

E. K. Anderson, M. KamiÅska, K. C. Chartkunchand +6

Spontaneous decays of small, hot silver cluster anions Ag $_{n}$ , $n = 4 - 7$ have been studied using one of the rings of the Double ElectroStatic Ion Ring ExpEriment (DESIREE). Observa…

astro-ph.GA2016

Photo-stability of super-hydrogenated PAHs determined by action spectroscopy experiments

M. Wolf, H. V. Kiefer, J. Langeland +5

We have investigated the photo-stability of pristine and super-hydrogenated pyrene cations C $_{16}$ H $_{10 + m}^{+}, m = 0, 6, or 16$ ) by means of gas-phase action spectrosc…

physics.chem-ph2025

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 (C $_{9}$ H $_{8}$ ) 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…

physics.chem-ph2015

Threshold Energies for Single Carbon Knockout from Polycyclic Aromatic Hydrocarbons

M. H. Stockett, M. Gatchell, T. Chen +6

We have measured absolute cross sections for ultrafast (fs) single-carbon knockout from Polycyclic Aromatic Hydrocarbon (PAH) cations as functions of He-PAH center-of-mass collisio…

physics.atom-ph2018

Rotationally cold OH $^{-}$ ions in the cryogenic electrostatic ion-beam storage ring DESIREE

H. T. Schmidt, G. Eklund, K. C. Chartkunchand +14

We apply near-threshold laser photodetachment to characterize the rotational quantum level distribution of OH $^{-}$ ions stored in the cryogenic ion-beam storage ring, DESIREE, at St…

physics.chem-ph2018

The threshold displacement energy of buckminsterfullerene C $_{60}$ and formation of the endohedral defect fullerene He@C $_{59}$

M. H. Stockett, M. Wolf, M. Gatchell +3

We have measured the threshold center-of-mass kinetic energy for knocking out a single carbon atom from C $_{60}^{-}$ in collisions with He. Combining this experimental result with cl…

physics.atm-clus2018

Spontaneous decay of small copper cluster anions Cu $_{n}^{-}$ , $n = 3 - 6$ 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 $_{n}^{-}$ , $n = 3 - 6$ ) stored at cryogenic temperatures in one of the electrostatic ion storage r…

physics.acc-ph2018

First storage of ion beams in the Double Electrostatic Ion-Ring Experiment - DESIREE

H. T. Schmidt, R. D. Thomas, M. Gatchell +31

We report on the first storage of ion beams in the Double ElectroStatic Ion Ring ExpEriment; DESIREE, at Stockholm University. We have produced beams of atomic carbon anions and sm…

physics.atom-ph2018

Radiative lifetimes of the bound excited states of $Pt^{-}$

K. C. Chartkunchand, M. KamiÅska, E. K. Anderson +20

The intrinsic radiative lifetimes of the $5 d^{10} 6 s$ $^{2} S_{1/2}$ and $5 d^{9} 6 s^{2}$ $^{2} D_{3/2}$ bound excited states in the platinum anion $Pt^{-}$ have be…

physics.atm-clus2019

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}…

physics.ins-det2018

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.…

physics.atom-ph2024

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, $^{28}$ Si, $^{29}$ Si and $^{30}$ Si, have been performed at the cryogenic electr…

physics.atom-ph2015

The lifetime of the bound excited level in Ni $^{-}$

M. KamiÅska, V. T. Davis, O. M. Hole +16

The intrinsic lifetime of the upper level in the bound-bound 3d $^{9}$ 4s $^{2}$ $^{2}$ D $_{3/2}$ $\to$ 3d $^{9}$ 4s $^{2}$ $^{2}$ D $_{5/2}$ radiative transition in Ni $^{-}$ was measured to be 1…

physics.atm-clus2018

Dianion diagnostics in DESIREE: High-sensitivity detection of $C_{n}^{2 -}$ from a sputter ion source

K. C. Chartkunchand, M. H. Stockett, E. K. Anderson +14

A sputter ion source with a solid graphite target has been used to produce dianions with a focus on carbon cluster dianions, $C_{n}^{2 -}$ , with $n = 7 - 24$ . Singly and doubly c…

physics.atom-ph2018

Evidence for two-electron processes in the mutual neutralization of O- with O+ and N+ at Subthermal Collision Energies

N. de Ruette, A. Dochain, T. Launoy +7

We have measured total absolute cross sections for the Mutual Neutralization (MN) of O- with O+/N+. A fine resolution (of about 50 meV) in the kinetic energy spectra of the product…

Publications (15)

Decays of excited silver cluster anions Agn​, n=4 to 7, in DESIREE

Photo-stability of super-hydrogenated PAHs determined by action spectroscopy experiments

Dissociation and radiative stabilization of the indene cation: The nature of the C-H bond and astrochemical implications

Threshold Energies for Single Carbon Knockout from Polycyclic Aromatic Hydrocarbons

Rotationally cold OH− ions in the cryogenic electrostatic ion-beam storage ring DESIREE

The threshold displacement energy of buckminsterfullerene C60​ and formation of the endohedral defect fullerene He@C59​

Spontaneous decay of small copper cluster anions Cun−​, n=3−6 on long time scales

First storage of ion beams in the Double Electrostatic Ion-Ring Experiment - DESIREE

Radiative lifetimes of the bound excited states of Pt−

Spontaneous electron emission from hot silver dimer anions: Breakdown of the Born-Oppenheimer approximation

DESIREE electrospray ion source test bench and setup for Collision Induced Dissociation experiments

Precision measurements on Si-

The lifetime of the bound excited level in Ni−

Dianion diagnostics in DESIREE: High-sensitivity detection of Cn2−​ from a sputter ion source

Evidence for two-electron processes in the mutual neutralization of O- with O+ and N+ at Subthermal Collision Energies

Decays of excited silver cluster anions Ag $_{n}$ , $n = 4$ to $7$ , in DESIREE

Rotationally cold OH $^{-}$ ions in the cryogenic electrostatic ion-beam storage ring DESIREE

The threshold displacement energy of buckminsterfullerene C $_{60}$ and formation of the endohedral defect fullerene He@C $_{59}$

Spontaneous decay of small copper cluster anions Cu $_{n}^{-}$ , $n = 3 - 6$ on long time scales

Radiative lifetimes of the bound excited states of $Pt^{-}$

The lifetime of the bound excited level in Ni $^{-}$

Dianion diagnostics in DESIREE: High-sensitivity detection of $C_{n}^{2 -}$ from a sputter ion source