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学術論文

Laser-probing the rotational cooling of molecular ions by electron collisions

MPS-Authors
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Kalosi,  Abel
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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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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Müll,  Damian
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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

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

External Resource

https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.128.183402
(出版社版)

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フルテキスト (公開)

2203.17124.pdf
(プレプリント), 3MB

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引用

Kalosi, A., Grieser, M., von Hahn, R., Hechtfischer, U., Krantz, C., Kreckel, H., Müll, D., Paul, D., Savin, D. W., Wilhelm, P., Wolf, A., & Novotny, O. (2022). Laser-probing the rotational cooling of molecular ions by electron collisions. Physical Review Letters, 128(18):. doi:10.1103/PhysRevLett.128.183402.


引用: https://hdl.handle.net/21.11116/0000-000A-6B55-F
要旨
We present state-selected measurements of rotational cooling and excitation
rates of CH+ molecular ions by inelastic electron collisions. The
experiments are carried out at the Cryogenic Storage Ring, making use of a
monoenergetic electron beam at matched velocity in combination with
state-sensitive laser-dissociation of the CH+ ions for simultaneous
monitoring of the rotational level populations. Employing storage times of up
to 600 s, we create conditions where electron-induced cooling to the J = 0
ground state dominates over radiative relaxation, allowing for the experimental
determination of inelastic electron collision rates to benchmark
state-of-the-art theoretical calculations. On a broader scale, our experiments
pave the way to probe inelastic electron collisions for a variety of molecular
ions relevant in various plasma environments.