Publikationen

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