Dresden 2011 – wissenschaftliches Programm
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 .
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  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:  Sh. Akhmadaliev et al., MS6.2, DPG Frühjahrstagung der Sektion AMOP, Hannover 2010.  www.dresden-ams.de