5 YEARS OF ION-LASER INTERACTION MASS SPECTROMETRY—STATUS AND PROSPECTS OF ISOBAR SUPPRESSION IN AMS BY LASERS

A setup for ion-laser interaction was coupled to the state-of-the-art AMS facility VERA five years ago and its potential and applicability as a new means of isobar suppression in accelerator mass spectrometry (AMS) has since been explored. Laser photodetachment and molecular dissociation processes o...

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Bibliographic Details
Published in:Radiocarbon 2022-06, Vol.64 (3), p.555-568
Main Authors: Martschini, Martin, Lachner, Johannes, Hain, Karin, Kern, Michael, Marchhart, Oscar, Pitters, Johanna, Priller, Alfred, Steier, Peter, Wiederin, Andreas, Wieser, Alexander, Golser, Robin
Format: Article
Language:English
Subjects:
Cesium isotopes
Ion beams
Ions
Lasers
Mass spectrometry
Nuclides
Photodetachment
Scientific imaging
Spectroscopy
Strontium 90
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Summary:A setup for ion-laser interaction was coupled to the state-of-the-art AMS facility VERA five years ago and its potential and applicability as a new means of isobar suppression in accelerator mass spectrometry (AMS) has since been explored. Laser photodetachment and molecular dissociation processes of anions provide unprecedented isobar suppression factors of >1010 for several established AMS isotopes like 36Cl or 26Al and give access to new AMS isotopes like 90Sr, 135Cs or 182Hf at a 3-MV-tandem facility. Furthermore, Ion-Laser InterAction Mass Spectrometry has been proven to meet AMS requirements regarding reliability and robustness with a typical reproducibility of results of 3%. The benefits of the technique are in principle available to any AMS machine, irrespective of attainable ion beam energy. Since isobar suppression via this technique is so efficient, there often is no need for any additional element separation in the detection setup and selected nuclides may even become accessible without accelerator at all.
ISSN:0033-8222
1945-5755
DOI:10.1017/RDC.2021.73