Publications
Development of isobar separation for 182Hf AMS measurements of astrophysical interest
- Author(s)
- Christof Vockenhuber, Andreas Bergmaier, Thomas Faestermann, Klaus Knie, Gunther Korschinek, Walter Kutschera, Georg Rugel, Peter Steier, K Vorderwinkler, Anton Wallner
- Abstract
The detection of 182Hf by Accelerator Mass Spectrometry (AMS) is greatly complicated because of the stable and common isobar 182W. Although significant W reduction can be achieved during negative ion formation using HfF5-, additional separation is necessary to achieve detection sensitivities sufficient for astrophysical applications, i.e. detection of potential supernova-produced 182Hf on Earth. In this paper, we present a new development of isobar separation using the ΔTOF detection method at the Munich MP Tandem accelerator (TV = 14 MV), where ion energies for 182Hf of about 1 MeV/amu can be achieved. Particular attention is drawn on specific energy loss and energy loss straggling measurements in various materials, the basis for our method of isobar separation. © 2007 Elsevier B.V. All rights reserved.
- Organisation(s)
- Isotope Physics
- External organisation(s)
- TRIUMF, Technische Universität München
- Journal
- Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms
- Volume
- 259
- Pages
- 250-255
- No. of pages
- 6
- ISSN
- 0168-583X
- DOI
- https://doi.org/10.1016/j.nimb.2007.01.223
- Publication date
- 2007
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103005 Atomic physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/ca94c013-e452-49af-b4ba-602ee5079832