Fluorides or hydrides? 41Ca performance at VERA’s 3-MV AMS facility

Wallner, A.; Forstner, O.; Golser, Robin; Korschinek, G.; Kutschera, W.; Priller, Alfred; Steier, Peter; Vockenhuber, Christof

doi:10.1016/j.nimb.2009.10.034

Cited by 12 publications

(3 citation statements)

References 28 publications

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“…These isotopes have been investigated with ILIAMS, but further research work is required before full AMS measurements with environmental samples are feasible. 41 Ca AMS of 41 Ca (T 1/2 = 1.03×10 5 a) for both cosmogenic and medical applications suffers from interference of 41 K. The ion species of choice is CaF 3 − due to the hassle involved in chemical preparation and handling of CaH 2 despite better AMS performance of the latter (Wallner et al 2010). ISA-results demonstrated that suppression of KF 3 − vs. CaF 3 − is possible inside ion guides (Zhao et al 2016), despite that KF 3 − is a superhalogen anion with a calculated VDE of 6.83 eV (Lo and Hopkinson 2011).…”

Section: In-depth Investigation Stagementioning

confidence: 99%

5 Years of Ion-Laser Interaction Mass Spectrometry—status and Prospects of Isobar Suppression in Ams by Lasers

et al. 2021

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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.

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Section: In-depth Investigation Stagementioning

confidence: 99%

5 Years of Ion-Laser Interaction Mass Spectrometry—status and Prospects of Isobar Suppression in Ams by Lasers

et al. 2021

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“…Since Ca À ions are not formed in sputter sources with sufficient intensity for routine measurements, the more prolific molecular ions CaH 3 À and CaF 3 À are used for AMS instead [13]. At TNO we used CaF 3 À because it requires less effort for sample preparation [17]. The sample material is introduced as CaF 2 into the sputter source, which generates typical CaF 3 À beams of 200-300 nA.…”

Section: Camentioning

confidence: 99%

The 1MV multi-element AMS system for biomedical applications at the Netherlands Organization for Applied Scientific Research (TNO)

Klein¹,

Vaes²,

Fabriek³

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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“…Extracting (CaH 3 ) − from calcium hydride samples would be a solution because of the instability of (KH 3 ) − [5,6]. However, this compound is very hygroscopic and its handling is problematic.…”

Section: Introductionmentioning

confidence: 99%