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How can negative ions be used to improve the performance of laser-based AMS?

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Negative ions can be used to improve the performance of laser-based AMS by providing isobar suppression and enhancing the detection limit for certain isotopes. In AMS, negative ions are used in the injection stage to provide isobar suppression when the contaminating isobar does not form stable negative ions . This allows for the selective measurement of specific isotopes. Additionally, laser photodetachment of negative ions can be used as an additional isobaric selection filter in AMS. By selectively removing interfering isobars through laser-induced photodetachment, the background signal can be further suppressed, leading to improved detection limits for long-lived heavy radionuclides . This technique has been successfully implemented in the Vienna Environmental Research Accelerator (VERA) facility, where laser-photodetachment has been used to suppress the isobar 36S by 10 orders of magnitude, allowing for competitive measurements at low accelerator voltages .

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Open access Laser Photodetachment of Negative Ions - Fundamental Research and Applications Pontus Andersson 07 May 2009 1 Citations	The paper does not provide information on how negative ions can be used to improve the performance of laser-based AMS.
Journal Article•DOI Development of a commercial Automated Laser Gas Interface (ALGI) for AMS R.E. Daniel, M. Mores, R.L. Kitchen, M.L. Sundquist, T.M. Hauser, Mark Stodola, Steven R. Tannenbaum, Paul L. Skipper, Rosa G. Liberman, Graeme Young, S. Corless, Mark Tucker - Show less +11 more 01 Jan 2013-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 2 Citations	The provided paper does not mention how negative ions can be used to improve the performance of laser-based AMS.
Journal Article•DOI 36Cl in a new light: AMS measurements assisted by ion-laser interaction Johannes Lachner, Christoph Marek, Martin Martschini, Alfred Priller, Peter Steier, Robin Golser - Show less +5 more 01 Oct 2019-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 10 Citations	The paper does not provide information on how negative ions can be used to improve the performance of laser-based AMS.
Journal Article•DOI Laser ablation positive-ion AMS of neutron activated actinides R. C. Pardo, T. Palchan-Hazan, R. Scott, Michael Paul, O. Nusair, W. Bauder, R. C. Vondrasek, D. Seweryniak, S. Baker, Rashi Talwar, Philippe Collon, F. G. Kondev, G. Youinou, Massimo Salvatores, Giuseppe Palmiotti, Jeremy M Berg, J. Giglio, M.T. Giglio, G. Imel, C. Nair, C. L. Jiang - Show less +20 more 01 Jan 2019-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 3 Citations	The provided paper does not mention the use of negative ions to improve the performance of laser-based AMS.

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