Autodetachment of Diatomic Carbon Anions from Long-Lived High-Rotation Quartet 
States

Schmidt, Viviane C.; Čurík, Roman; Ončák, Milan; Blaum, Klaus; George, Sebastian; Göck, Jürgen; Grieser, Manfred; Grussie, Florian; von Hahn, Robert; Krantz, Claude; Kreckel, Holger; Novotný, Oldrich; Spruck, Kaija; Wolf, Andreas

doi:10.1103/PhysRevLett.133.183001

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Autodetachment of Diatomic Carbon Anions from Long-Lived High-Rotation Quartet States

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Schmidt, Viviane C.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum, Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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George, Sebastian
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Göck, Jürgen
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Grieser, Manfred
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Grussie, Florian
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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von Hahn, Robert
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Krantz, Claude
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Kreckel, Holger
Holger Kreckel, ASTROLAB - MPG-Gruppe im Anschluss an ERC Starting Grant, MPI for Nuclear Physics, Max Planck Society;

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Novotný, Oldrich
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Spruck, Kaija
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Wolf, Andreas
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.133.183001
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Citation

Schmidt, V. C., Čurík, R., Ončák, M., Blaum, K., George, S., Göck, J., et al. (2024). Autodetachment of Diatomic Carbon Anions from Long-Lived High-Rotation Quartet States. Physical Review Letters, 133(18): 183001. doi:10.1103/PhysRevLett.133.183001.

Cite as: https://hdl.handle.net/21.11116/0000-0010-0809-C

Abstract

We show that strong molecular rotation drastically modifies the autodetachment of C₂⁻ ions in the lowest quartet electronic state a⁢⁴Σ_u⁺. In the strong-rotation regime, levels of this state only decay by a process termed “rotationally assisted” autodetachment, whose theoretical description is worked out based on the nonlocal resonance model. For autodetachment linked with the exchange of six rotational quanta, the results reproduce a prominent, hitherto unexplained electron emission signal with a mean decay time near 3 ms, observed on stored C₂⁻ ions from a hot ion source.