Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

DREAMS, the DREsden AMS-facility, is performing routine accelerator mass spectrometry of ¹⁰Be, ²⁶Al, ³⁶Cl, ⁴¹Ca, and ¹²⁹I for diverse kinds of applications. All DREAMS data is normalised directly to primary standards or traceable via cross-calibration of secondary standards to those.
Recent technical developments such as a low-memory ion source for ³⁶Cl and ¹²⁹I and sophisticated tuning strategies for ¹²⁹I led to improved accuracy data.Tests of ion source output have been performed with different metal binders, sample-to-binder mixing ratios, and compaction pressures in order to find optimal parameters. The highest and most stable outputs have been obtained for ¹⁰Be, ²⁶Al, and ⁴¹Ca for the following binders and mixing ratios (by weight): BeO:Nb, 1:4; Al₂O₃:Ag, 1:1; CaF₂:Ag, 1:4. Higher beam currents generally result in reduced statistical uncertainty. Cross-contamination and long-term memory seem to be underestimated problems asking for further tests and improvements such as the development of low-level in-house-standards.