Experimental and theoretical studies of excited states in 
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Kristiansson, M. K.; Schiffmann, Sacha; Grumer, Jon; Karls, J.; Ruette, N. de; Eklund, Gustav; Ideböhn, Veronica; Gibson, N. D.; Brage, Tomas; Zettergren, Henning; Hanstorp, Dag; Schmidt, H. T.

doi:10.1103/physreva.103.062806

Cited by 7 publications

(1 citation statement)

References 39 publications

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“…After this, the signal drops off, due to imperfections in the storage conditions. The conditions at DESIREE allow for storage lifetimes on the order of hours (Bäckström et al 2015;Kristiansson et al 2021), but the small number of ions present in the experiment makes optimizing the ring parameters for longer lifetimes difficult. The 107 ± 11 s beam lifetime measured here thus represents an instrument optimization limitation and not a residual-gas-limited ion beam lifetime or a finite lifetime of the -C 59 fragments.…”

Section: Desiree Measurementsmentioning

confidence: 99%

Stability of C₅₉ Knockout Fragments from Femtoseconds to Infinity

Gatchell,

Florin,

Indrajith

et al. 2024

ApJ

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We have studied the stability of C59 anions as a function of time, from their formation on femtosecond timescales to their stabilization on second timescales and beyond, using a combination of theory and experiments. The C 59 − fragments were produced in collisions between C60 fullerene anions and neutral helium gas at a velocity of 90 km s−1 (corresponding to a collision energy of 166 eV in the center-of-mass frame). The fragments were then stored in a cryogenic ion beam storage ring at the DESIREE facility, where they were followed for up to 1 minute. Classical molecular dynamics simulations were used to determine the reaction cross section and the excitation energy distributions of the products formed in these collisions. We find that about 15% of the C 59 − ions initially stored in the ring are intact after about 100 ms and that this population then remains intact indefinitely. This means that C60 fullerenes exposed to energetic atoms and ions, such as stellar winds and shock waves, will produce stable, highly reactive products, like C59, that are fed into interstellar chemical reaction networks.

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Section: Desiree Measurementsmentioning

confidence: 99%

Stability of C₅₉ Knockout Fragments from Femtoseconds to Infinity

Gatchell,

Florin,

Indrajith

et al. 2024

ApJ

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DESIREE: A Laboratory Astrophysics Experiment with Cryogenically Cooled Electrostatic Ion Beam Storage Rings

Schmidt

2023

European Conference on Laboratory Astrophysics ECLA2020

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Electron Affinities of Atoms and Structures of Atomic Negative Ions

Ning

2022

Journal of Physical and Chemical Reference Data

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This Review presents electron affinities of atoms and structures of atomic negative ions. The negative ion properties of many elements in the main groups of the Periodic Table were well known in the late 20th century. However, our knowledge of the atomic negative ions of transitional elements, lanthanides, and actinides was completely lacking or largely rather qualitative at that time. Substantial progress both on experimental and theoretical sides in this subject has happened during the last two decades. New developments in the experimental methods that yield accurate electron affinities are described in this Review. Based on the previous reviews, a survey of the electron affinity toward the completion of the Periodic Table is presented. A set of atomic electron affinities and energy levels of atomic anions is recommended.

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Experimental and theoretical studies of excited states in Ir−

Cited by 7 publications

References 39 publications

Stability of C₅₉ Knockout Fragments from Femtoseconds to Infinity

Stability of C₅₉ Knockout Fragments from Femtoseconds to Infinity

DESIREE: A Laboratory Astrophysics Experiment with Cryogenically Cooled Electrostatic Ion Beam Storage Rings

Electron Affinities of Atoms and Structures of Atomic Negative Ions

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Experimental and theoretical studies of excited states in Ir−

Cited by 7 publications

References 39 publications

Stability of C59 Knockout Fragments from Femtoseconds to Infinity

Stability of C59 Knockout Fragments from Femtoseconds to Infinity

DESIREE: A Laboratory Astrophysics Experiment with Cryogenically Cooled Electrostatic Ion Beam Storage Rings

Electron Affinities of Atoms and Structures of Atomic Negative Ions

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Product

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Stability of C₅₉ Knockout Fragments from Femtoseconds to Infinity

Stability of C₅₉ Knockout Fragments from Femtoseconds to Infinity