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

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

Research output: Contribution to journalArticlepeer-review

Abstract

The nuclide 35Cl 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,γ) cross section of 35Cl for neutron spectra simulating Maxwell-Boltzmann distributions of kT,∼,30,keV and 40,keV, respectively. 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 7Li(p,n)7Be 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 sections of 8.33(32),mb. Using this new value in stellar isotopic abundance calculations, minor changes for the abundances of 35Cl, 36Cl and 36S are derived.
Original languageEnglish
Article number015801
JournalPhysical Review C
DOIs
Publication statusPublished - 8 Jan 2019

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