Mainz 2017 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 9: Accelerator Mass Spectrometry and Applications II

MS 9.10: Vortrag

Donnerstag, 9. März 2017, 16:45–17:00, RW 2

Avoiding pitfalls: Better performance of AMS at DREAMS — •Georg Rugel1, DREAMS users2, Nasrin B. Khojasteh1, Silke Merchel1, Andreas Scharf1, and René Ziegenrücker11HZDR, Dresden, Germany — 2all over the world

Since autumn 2011, the DREsden AMS-facility (DREAMS), is performing routine AMS at the 6 MV tandem accelerator of the ion beam centre (IBC) at the Helmholtz-Zentrum Dresden-Rossendorf [1,2]. In routine operation are measurements of 10Be, 26Al, 36Cl, 41Ca, and 129I for a wide range of applications. Most of the samples are prepared at our own chemistry labs – or in close cooperation with the users – to allow best performance for diverse tasks [3]. Our performance to measure these routine isotopes improved considerably over the last years [2]. This successful approach needs a careful selection of measurement parameters like a propper measurement order, a specific tuning using low-level (traceable) standards and individual setting of detector parameters for each beam time. One example for an additional improvement is the low-background value of 26Al/27Al = 6× 10−16 reached in blanks from commercial carriers. For 41Ca measurements we get 30% more transmission, while having ten times less background from 41K. Further promising developments include the upgrade to non-routine AMS-nuclides like 44Ti [4] and to actinides [5].

Ref.: [1] S. Akhmadaliev et al., NIMB 294 (2013) 5. [2] G. Rugel et al., NIMB 370 (2016) 94. [3] S. Merchel, this conference. [4] A. Scharf, this conference. [5] Nasrin B. Khojasteh, this conference.

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