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Isobar suppression in AMS using laser photodetachment

Forstner, O; Andersson, P.; Diehl, C.; Golser, Robin; Hanstorp, Dag; Kutschera, Walter; Lindahl, Anton O; Priller, Alfred; Steier, Peter; Wallner, Anton

Description

We are investigating the possibility of using laser photodetachment of negative atomic and molecular ions as an additional isobaric selection filter in accelerator mass spectrometry. The aim of this study is to find a possibility to further improve the detection limit for long-lived heavy radionuclides at AMS facilities. We will focus on the astrophysical relevant radionuclide182Hf, which is one of the isotopes measured with the 3 MV tandem AMS facility VERA (Vienna Environmental Research...[Show more]

dc.contributor.authorForstner, O
dc.contributor.authorAndersson, P.
dc.contributor.authorDiehl, C.
dc.contributor.authorGolser, Robin
dc.contributor.authorHanstorp, Dag
dc.contributor.authorKutschera, Walter
dc.contributor.authorLindahl, Anton O
dc.contributor.authorPriller, Alfred
dc.contributor.authorSteier, Peter
dc.contributor.authorWallner, Anton
dc.date.accessioned2015-12-13T22:54:59Z
dc.identifier.issn0168-583X
dc.identifier.urihttp://hdl.handle.net/1885/82342
dc.description.abstractWe are investigating the possibility of using laser photodetachment of negative atomic and molecular ions as an additional isobaric selection filter in accelerator mass spectrometry. The aim of this study is to find a possibility to further improve the detection limit for long-lived heavy radionuclides at AMS facilities. We will focus on the astrophysical relevant radionuclide182Hf, which is one of the isotopes measured with the 3 MV tandem AMS facility VERA (Vienna Environmental Research Accelerator) at the University of Vienna. Laser-induced isobar suppression is also of importance for radioactive-beam facilities. The present detection limit for measuring the isotope ratio182Hf/Hf at VERA is 1 × 10- 11. The limiting factor is the strong background of the stable isobar182W. Currently this background is suppressed using suitable molecular ions in the injection stage. Selective laser photodetachment of the negative ions at the injector can lead to an additional suppression of the interfering isobar. Test experiments have been carried out at the negative ion laser spectroscopy setup at Göteborg University. In a small ion beam apparatus pulsed tunable laser radiation is used to measure the photodetachment cross-section of different atomic and molecular negative ions. We will present studies of the photodetachment process for various tungsten and hafnium molecules with the aim to find a selective isobaric suppression scheme using laser photodetachment spectroscopy in combination with AMS.
dc.publisherElsevier
dc.sourceNuclear Instruments and Methods in Physics Research: Section B
dc.subjectKeywords: Alpha particle spectrometers; Asset management; Mass spectrometry; Negative ions; Particle spectrometers; Radioisotopes; Accelerator mass spectrometry; Detection limit; Laser photodetachment; Molecular ions; Negative ion; Photodetachment; High performance Mass spectrometry; Negative ion; Photodetachment
dc.titleIsobar suppression in AMS using laser photodetachment
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume266
dc.date.issued2008
local.identifier.absfor020202 - Nuclear Physics
local.identifier.ariespublicationf5625xPUB10601
local.type.statusPublished Version
local.contributor.affiliationForstner, O, University of Vienna
local.contributor.affiliationAndersson, P., Goteborg University
local.contributor.affiliationDiehl, C., Gutenberg Universitat Mainz
local.contributor.affiliationGolser, Robin, University of Vienna
local.contributor.affiliationHanstorp, Dag, University of Gothenburg
local.contributor.affiliationKutschera, Walter, University of Vienna
local.contributor.affiliationLindahl, Anton O, University of Gothenburg
local.contributor.affiliationPriller, Alfred, University of Vienna
local.contributor.affiliationSteier, Peter, University of Vienna
local.contributor.affiliationWallner, Anton, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue19-20
local.bibliographicCitation.startpage4565
local.bibliographicCitation.lastpage4568
local.identifier.doi10.1016/j.nimb.2008.05.080
dc.date.updated2015-12-11T11:07:28Z
local.identifier.scopusID2-s2.0-53449101247
CollectionsANU Research Publications

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