Publikationen

Measurement of the stellar Ni-58( n,gamma)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
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/measurement-of-the-stellar-ni58-ngammani59-cross-section-with-accelerator-mass-spectrometry(448ca49f-1c32-451d-896c-d6dc0c1de2a2).html