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

Autor(en)

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

Abstrakt

The Ni-58(n,gamma)Ni-59 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 Li-7(p, n) Be-7 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 <sigma >(30 keV) = 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(en)

Isotopenphysik

Externe Organisation(en)

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

Band

95

Anzahl der Seiten

12

ISSN

0556-2813

DOI

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

Publikationsdatum

03-2017

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/448ca49f-1c32-451d-896c-d6dc0c1de2a2