Development of isobar separation for 182Hf AMS measurements of astrophysical interest

Autor(en)

Christof Vockenhuber, Andreas Bergmaier, Thomas Faestermann, Klaus Knie, Gunther Korschinek, Walter Kutschera, Georg Rugel, Peter Steier, K Vorderwinkler, Anton Wallner

Abstrakt

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(en)

Isotopenphysik

Externe Organisation(en)

TRIUMF Canada's National Laboratory for Particle and Nuclear Physics, Technische Universität München, Universität Wien

Journal

Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms

Band

259

Seiten

250-255

Anzahl der Seiten

6

ISSN

0168-583X

DOI

https://doi.org/10.1016/j.nimb.2007.01.223

Publikationsdatum

2007

Peer-reviewed

Ja

ÖFOS 2012

103005 Atomphysik

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/development-of-isobar-separation-for-182hf-ams-measurements-of-astrophysical-interest(ca94c013-e452-49af-b4ba-602ee5079832).html