Accelerator mass spectrometry measurement of the reaction Cl-35(n, gamma)Cl-36 at keV energies

Autor(en)

Stefan Pavetich, Anton Wallner, Martin Martschini, Shavkat Akhmadaliev, Iris Dillmann, Keith Fifield, Shlomi Halfon, Tanja Heftrich, Franz Kaeppeler, Claudia Lederer-Woods, Silke Merchel, Michael Paul, Rene Reifarth, Georg Rugel, Peter Steier, Moshe Tessler, Stephen Tims, Mario Weigand, Leo Weissman

Abstrakt

The nuclide Cl-35 can act as a minor "neutron poison" in the stellar slow neutron capture process. Neutron activation combined with accelerator mass spectrometry (AMS) was applied to measure the (n, gamma) cross section of Cl-35 for neutron spectra simulating Maxwell-Boltzmann distributions of kT approximate to 30 and 40 keV. The neutron activations were performed at the Karlsruhe Van de Graaff accelerator and at the superconducting linear accelerator of the Soreq Applied Research Accelerator Facility utilizing the Li-7(p, n)Be-7 reaction. AMS measurements of the irradiated samples were performed at the 3 MV Vienna Environmental Research Accelerator, the 6 MV tandem accelerator at the Dresden AMS facility, and the 14 UD tandem accelerator of the Australian National University in Canberra. Our method is independent of previous measurements. For an energy of kT = 30 keV, we report a Maxwellian averaged cross section of 8.33(32) mb. Using this new value in stellar isotopic abundance calculations, minor changes for the abundances of Cl-35, Cl-36, and S-36 are derived.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

Australian National University, Helmholtz-Zentrum Dresden-Rossendorf, University of British Columbia (UBC), University of Victoria, Karlsruher Institut für Technologie, Soreq NRC, Johann Wolfgang Goethe-Universität Frankfurt am Main, University of Edinburgh, Hebrew University Jerusalem, Universität Wien

Journal

Physical Review C

Band

99

Anzahl der Seiten

11

ISSN

2469-9985

DOI

https://doi.org/10.1103/PhysRevC.99.015801

Publikationsdatum

01-2019

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/accelerator-mass-spectrometry-measurement-of-the-reaction-cl35n-gammacl36-at-kev-energies(b54d294b-0fbe-4631-9b6c-5aaeff60175d).html