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On the measurement of 10Be on the 1 MV compact AMS system at the Centro Nacional de Aceleradores (Spain)

AuthorsRuiz-Gómez, A.; Chamizo, Elena ; López-Gutiérrez, J. M. ; García-León, Manuel
Issue Date2010
CitationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 268(7-8): 733-735 (2010)
AbstractIn this work we present the most recent improvements performed by our group on 10Be measurements on the 1 MV AMS system recently set up at the CNA (Centro Nacional de Aceleradores), in Seville (Spain). Our efforts have been focused on the study of the viability of our system for BeO and BeF- measurements. To achieve this, different standard materials have been measured to demonstrate the reliability of the system for BeO measurements in a wide 10Be/9Be atomic ratio range and several environmental samples have been studied both at the 1 MV AMS CNA facility and at the 6 MV AMS ETH-PSI facility of Zurich to validate our measurements. The results show a good agreement between laboratories. New experiments also have been carried out selecting 1+ and 2+ charge states at the exit of the accelerator and inserting Si3N3.1 foils with different thicknesses to separate 10Be from its isobar, 10B. The influence of each foil on the overall transmission (detected 10Be compared to BeO- injected into the accelerator) and background level was also assessed. In addition some tests were also done to assess the viability of BeF2 and BaBeF4 measurements at our system. Several metal matrices and cathode preparation procedures for BeO samples were investigated to maximize current and cathode lifetime. © 2009 Elsevier B.V. All rights reserved.
Identifiersdoi: 10.1016/j.nimb.2009.10.017
issn: 0168-583X
Appears in Collections:(CNA) Artículos
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