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MS: Fachverband Massenspektrometrie

MS 9: New Developments II

MS 9.2: Hauptvortrag

Freitag, 24. September 2021, 11:15–11:45, H2

Multi-reflection time-of-flight mass spectrometry for cluster research — •Paul Fischer 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. Techniques for in-trap photodissociation, tandem MR-ToF MS, and the study of time-delayed dissociation processes have been developed. Examples include the dissociation behavior of bismuth clusters [4], the change thereof resulting from doping with a single lead atom [5], and the delayed dissociation of indium clusters [6].

[1] F. Wienholtz et al., Nature 498:346-349 (2013)

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

[3] D. Zajfman et al., Phys. Rev. A 55:R1577-R1580 (1997)

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

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

[6] P. Fischer at al., Phys. Rev. Research 2:043177 (2020)