Publications
Detection of sputtered molecular doubly charged anions: A comparison of secondary-ion mass spectrometry (SIMS) and accelerator mass spectrometry (AMS)
- Author(s)
- Hubert Gnaser, Robin Golser, Walter Kutschera, Alfred Priller, Christof Vockenhuber, Peter Steier
- Abstract
The detection of small molecular dianions by secondary-ion mass spectrometry (SIMS) and by accelerator mass spectrometry (AMS) is compared. In SIMS, the existence of these dianions can be identified safely if the total mass number of the molecule is odd and the dianion is hence detected at a half-integral mass number. The occurrence of fragmentation processes which may interfere with this scheme, is illustrated by means of the energy spectra of singly and doubly charged negative cluster ions. As compared to SIMS, AMS can rely, in addition, on the break-up of molecular species in the stripping process: this allows to monitor the simultaneous arrival of several atomic constituents with a clear energetic pattern in coincidence at the detector. This feature is exemplified for the C102- dianion. © 2004 Published by Elsevier B.V.
- Organisation(s)
- Isotope Physics
- External organisation(s)
- Technische Universität Kaiserslautern
- Pages
- 117-121
- No. of pages
- 5
- DOI
- https://doi.org/10.1016/j.apsusc.2004.03.084
- Publication date
- 2004
- Austrian Fields of Science 2012
- 1030 Physics, Astronomy
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/detection-of-sputtered-molecular-doubly-charged-anions-a-comparison-of-secondaryion-mass-spectrometry-sims-and-accelerator-mass-spectrometry-ams(02e38d3f-767f-4c1f-b59f-d4a6a64ea8af).html