Collision-induced electron detachment and dissociation of carbon cluster dianions: (C₇)^2-and (C₁₀)^2-

Author(s)

Martin Martschini, Hubert Gnaser, Robin Golser

Abstract

Carbon cluster dianions (C-7)(2-) and (C-10)(2-) were produced by sputtering of a graphite sample and detected by accelerator mass spectrometry (AMS). The collisional activation of these dianions was studied via their interaction with He gas in an ion beam cooler device which is part of the AMS instrument. Contrary to the respective monoanion cluster, the stability of the dianions exhibits a very pronounced dependence on the gas pressure (i.e., the He gas density). Above a specific value, the transmitted intensity of both dianions decreases strongly pointing to the occurrence of collision-induced reactions. From the observed reaction products, it is concluded that both electron detachment and dissociation take place upon collisions with the gas atoms, following generic pathways such as (C-n)(2-) -> (C-n)- + e(-) and (C-n)(2-) -> (Cn-m)(-) + (C-m)(-).

Organisation(s)

Isotope Physics

External organisation(s)

Universität Wien

Journal

International Journal of Mass Spectrometry

Volume

483

No. of pages

7

ISSN

1387-3806

DOI

https://doi.org/10.1016/j.ijms.2022.116973

Publication date

01-2023

Peer reviewed

Yes

Austrian Fields of Science 2012

104026 Spectroscopy

Keywords

ASJC Scopus subject areas

Condensed Matter Physics, Instrumentation, Spectroscopy, Physical and Theoretical Chemistry

Portal url

https://ucris.univie.ac.at/portal/en/publications/collisioninduced-electron-detachment-and-dissociation-of-carbon-cluster-dianions-c72and-c102(51634cc8-dcbb-4ddb-9951-d6a0a932b14c).html