Photodissociation of an internally cold beam of CH+ ions in a cryogenic storage 
ring

O'Connor, Aodh; Becker, Arno; Blaum, Klaus; Breitenfeldt, Christian; George, Sebastian; Göck, Jürgen; Grieser, Manfred; Grussie, Florian; Guerin, Elisabeth Anna; von Hahn, Robert; Hechtfischer, U.; Herwig, Philipp; Karthein, Jonas; Krantz, Claude; Kreckel, Holger; Lohmann, Svenja; Meyer, Christian; Mishra, Preeti Manjari; Novotny, C.; Repnow, Roland; Saurabh, Sunny; Schwalm, Dirk; Spruck, Kaija; Kumar, Sunil; Vogel, Stephen; Wolf, Andreas

doi:10.1103/PhysRevLett.116.113002

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Photodissociation of an internally cold beam of CH⁺ ions in a cryogenic storage ring

MPS-Authors

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O'Connor, Aodh
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Becker, Arno
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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Breitenfeldt, Christian
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Institut fuer Physik, Ernst-Moritz-Arndt- Universitaet, 17487 Greifswald;

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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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Guerin, Elisabeth Anna
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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Hechtfischer, U.
Prof. Dirk Schwalm, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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

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Karthein, Jonas
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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Lohmann, Svenja
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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

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

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

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

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

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Schwalm, Dirk
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100, Israel;

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

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Vogel, Stephen
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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http://link.aps.org/doi/10.1103/PhysRevLett.116.113002
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Citation

O'Connor, A., Becker, A., Blaum, K., Breitenfeldt, C., George, S., Göck, J., et al. (2016). Photodissociation of an internally cold beam of CH⁺ ions in a cryogenic storage ring. Physical Review Letters, 116(11): 113002. doi:10.1103/PhysRevLett.116.113002.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-29D3-8

Abstract

We have studied the photodissociation of CH⁺ in the Cryogenic Storage Ring at ambient temperatures below 10 K. Owing to the extremely high vacuum of the cryogenic environment, we were able to store CH⁺ beams with a kinetic energy of ∼60 keV for several minutes. Using a pulsed laser, we observed Feshbach-type near-threshold photodissociation resonances for the rotational levels J=0–2 of CH⁺, exclusively. In comparison to updated, state-of-the-art calculations, we find excellent agreement in the relative intensities of the resonances for a given J, and we can extract time-dependent level populations. Thus, we can monitor the spontaneous relaxation of CH⁺ to its lowest rotational states and demonstrate the preparation of an internally cold beam of molecular ions.