Publikationen

He stripping for AMS of <sup>236</sup>U and other actinides using a 3 MV tandem accelerator

Autor(en)
Stephan R. Winkler, Peter Steier, Josef Buchriegler, Johannes Lachner, Johanna Pitters, Alfred Priller, Robin Golser
Abstrakt

Interest in the long-lived radioisotope

236U (t

1/2 = 23.4 million years) has significantly increased recently, due to the emergence of environmental and earth science applications. Presently, only a few (AMS) accelerator mass spectrometry instruments are suited for this measurement. One major limitation is the relatively low total detection efficiency (on the order of 10

-4), which is partly caused by a low stripping yield of the positive ion charge state selected after the tandem accelerator. It has been shown that high yield can be achieved using helium as stripper gas for uranium ion energies below 0.35 MeV. Here we investigate the potential of He stripping of U at the 3-MV tandem accelerator VERA. Phenomenological charge state distributions for U and Th are presented for terminal voltages from 1.0 to 1.7 MV. These terminal voltages provide better background rejection than possible below 1 MeV, and are suited to the widely used 1-3 MV workhorses of many accelerator mass spectrometry laboratories. The methods can be applied to other actinides also.

Organisation(en)
Isotopenphysik
Externe Organisation(en)
National Research Foundation, Helmholtz-Zentrum Dresden-Rossendorf
Journal
Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms
Band
361
Seiten
458-464
Anzahl der Seiten
7
ISSN
0168-583X
DOI
https://doi.org/10.1016/j.nimb.2015.04.029
Publikationsdatum
10-2015
Peer-reviewed
Ja
ÖFOS 2012
103014 Kernphysik
Schlagwörter
ASJC Scopus Sachgebiete
Nuclear and High Energy Physics, Instrumentation
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/he-stripping-for-ams-of-236u-and-other-actinides-using-a-3-mv-tandem-accelerator(dc1a5139-7be3-49ff-8c12-fddcf862e0da).html