Hannover 2020 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 4: Clusters and Molecules

MS 4.1: Hauptvortrag

Dienstag, 10. März 2020, 14:00–14:30, f128

Multi-reflection time-of-flight mass spectrometry for cluster research — •Paul Fischer, Gerrit Marx, and Lutz Schweikhard — Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany

Multi-reflection time-of-flight mass spectrometry (MR-ToF MS) is known as a powerful tool for precision mass measurements [1] and high-resolution isobar separation [2] in nuclear physics. In atomic and molecular physics, MR-ToF devices are appreciated for their characteristics as electrostatic ion traps [3], however, they are often operated in non-bunching mode, abandoning high resolving powers in favor of easier interaction prerequisites.

At the University of Greifswald, MR-ToF MS is applied for high-resolution investigations of atomic clusters. To this end, a series of techniques for the work with ion bunches exhibiting large mass differences is developed. This includes in-trap photodissociation [4] and the introduction of a novel tandem MR-ToF MS scheme [5]. As a first case of interest, the dissociation behavior of bismuth clusters and the change thereof resulting from doping with a single lead atom is investigated.

[1] F. Wienholtz et al., Nature 498:346 (2013)

[2] R.N. Wolf at al., Phys. Rev. Lett. 110:041101 (2013)

[3] D. Zajfman et al., Phys. Rev. A 55:R1577 (1997)

[3] P. Fischer at al., Eur. Phys. J. D 73:105 (2019)

[5] P. Fischer at al., Phys. Rev. Research 1:033050 (2019)

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