The French accelerator mass spectrometry facility ASTER: Improved performance and developments

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• 作者：Maurice Arnold ; Silke Merchel ; Didier L. Bourlè ; s ; Ré ; gis Braucher ; Lucilla Benedetti ; Robert C. Finkel ; Georges Aumaî ; tre ; Andreas Gottdang ; Matthias Klein
• 关键词：Accelerator mass spectrometry ; Terrestrial cosmogenic nuclides (TCN) ; Calibration
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2010
• 出版时间：June 2010
• 年：2010
• 卷：268
• 期：11-12
• 页码：1954-1959
• 全文大小：550 K

文摘

Following the installation and acceptance test of the French 5 MV AMS facility ASTER, the focus has been on improving the capability for routine measurements of ¹⁰Be and ²⁶Al. Quality assurance has been established by the introduction of traceable AMS standards for each nuclide, by self-monitoring through participation in round-robin exercises and proficiency testing, and by surveillance of long- and short-time variability of blank and reference materials. A background level of 3 × 10⁻¹⁴ makes ASTER well-suited for measuring ⁴¹Ca/⁴⁰Ca in the10⁻¹² region, which is sufficient for a wide range of applications. Routine AMS measurements of volatile elements like ³⁶Cl and ¹²⁹I will most likely become feasible in the very near future as the result of significant improvements in the ion source design.