Measurement of the stellar Ni 58 (n,γ) Ni 59 cross section with accelerator mass spectrometry

Author(s)

Peter Ludwig, Georg Rugel, Iris Dillmann, Thomas Faestermann, Leticia Fimiani, Karin Hain, Gunther Korschinek, Johannes Lachner, Mikhail Poutivtsev, Klaus Knie, Michael Heil, Franz Kaeppeler, Anton Wallner

Abstract

The Ni58(n,γ)Ni59 cross section was measured with a combination of the activation technique and accelerator mass spectrometry (AMS). The neutron activations were performed at the Karlsruhe 3.7 MV Van de Graaff accelerator using the quasistellar neutron spectrum at kT=25 keV produced by the Li7(p,n)Be7 reaction. The subsequent AMS measurements were carried out at the 14 MV tandem accelerator of the Maier-Leibnitz Laboratory in Garching using the gas-filled analyzing magnet system (GAMS). Three individual samples were measured, yielding a Maxwellian-averaged cross section at kT=30 keV of (σ)30keV = 30.4 (23)syst(9)stat mbarn. This value is slightly lower than two recently published measurements using the time-of-flight (TOF) method, but agrees within the uncertainties. Our new results also resolve the large discrepancy between older TOF measurements and our previous value.

Organisation(s)

Isotope Physics

External organisation(s)

Technische Universität München, Helmholtz-Zentrum Dresden-Rossendorf, University of British Columbia (UBC), University of Victoria, FAIR GmbH, Karlsruher Institut für Technologie, GSI Helmholtzzentrum für Schwerionenforschung, Australian National University

Journal

Physical Review C

Volume

95

No. of pages

12

ISSN

0556-2813

DOI

https://doi.org/10.1103/PhysRevC.95.035803

Publication date

03-2017

Peer reviewed

Yes

Austrian Fields of Science 2012

103014 Nuclear physics

Keywords

ASJC Scopus subject areas

Nuclear and High Energy Physics

Portal url

https://ucris.univie.ac.at/portal/en/publications/measurement-of-the-stellar-ni-58-n-ni-59-cross-section-with-accelerator-mass-spectrometry(448ca49f-1c32-451d-896c-d6dc0c1de2a2).html