Dresden 2011 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 1: Accelerator Mass Spectrometry and Applications

MS 1.7: Vortrag

Montag, 14. März 2011, 12:15–12:30, GÖR 229

First experiments at the new 6 MV-Tandetron at HZDR — •Shavkat Akhmadaliev, René Heller, Daniel Hanf, and Silke Merchel — Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Ion Beam Physics and Materials Research, Dresden, Germany

The 6 MV tandem type accelerator replaces the old 5 MV machine in the beginning of 2011. Besides ion beam analysis (IBA) and material modification via high-energy ion implantation, the system is equipped for accelerator mass spectrometry (AMS). The first interest is in the radioisotopes 10Be, 26Al, 36Cl, 41Ca, and 129I [1].

An energy calibration of the machine and a test of ion beam energy stability have been carried out as a first experiment using the 1H(15N,α γ)12C nuclear reaction with a sharp resonance at an energy of 6385 keV. The total energy resolution for the system is about 12 keV.

First tests of the Dresden AMS system [2] have been performed and demonstrated background levels of 2·10−16 for 10Be/9Be, 7·10−16 for 26Al/27Al and 8·10−15 for 41Ca/40Ca, respectively. The background of 2·10−13 for 129I/127I originates from intrinsic 129I (MERCK KI), whereas the reasons for high 36Cl/35Cl background of 3·10−15 are under discussion.

References: [1] Sh. Akhmadaliev et al., MS6.2, DPG Frühjahrstagung der Sektion AMOP, Hannover 2010. [2] www.dresden-ams.de

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