Comparison of detector systems for the separation of Cl-36 and S-36 with a 3-MV tandem

Autor(en)

Tobias Orlowski, Oliver Forstner, Robin Golser, Walter Kutschera, Silke Merchel, Martin Martschini, Alfred Priller, Peter Steier, Christof Vockenhuber, Anton Wallner

Abstrakt

The possibility of detecting Cl-36 for geological exposure dating has been explored for several years at VERA (the Vienna Environmental Research Accelerator). First results on real samples were obtained with an ionization chamber (developed at the ETH/PSI, Zurich, Switzerland) with two anodes. To improve the suppression of S-36, we equipped the ionization chamber with an exit window and added a Time-of-Flight (TOF) system with a double-sided silicon strip detector (50 x 50 mm(2)) as stop detector. We optimized the TOF setup by using silicon nitride foils to reduce scattering tails in the energy spectra. At 3 MV terminal voltage, corresponding to a particle energy of 24 MeV of Cl-36(7+), we achieved a S-36(7+)- suppression of 21,500 (50% Cl-36-detector-efficiency).

Organisation(en)

Isotopenphysik

Externe Organisation(en)

TRIUMF Canada's National Laboratory for Particle and Nuclear Physics, CEREGE - Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement

Journal

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

Band

268

Seiten

847-850

Anzahl der Seiten

4

ISSN

0168-583X

DOI

https://doi.org/10.1016/j.nimb.2009.10.046

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/4084ea95-0dbc-415c-83d2-4e4af5d64cad