Mainz 2017 – wissenschaftliches Programm
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 Ziegenrücker1 — 1HZDR, 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 . Our performance to measure these routine isotopes improved considerably over the last years . 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  and to actinides .
Ref.:  S. Akhmadaliev et al., NIMB 294 (2013) 5.  G. Rugel et al., NIMB 370 (2016) 94.  S. Merchel, this conference.  A. Scharf, this conference.  Nasrin B. Khojasteh, this conference.