title: Measurement of the 60Fe(n, gamma)61Fe Cross Section at Stellar Temperatures.
abstract: Observations of galactic gamma-ray activity have challenged the current understanding of nucleosynthesis in massive stars. Recent measurements of (60)Fe abundances relative to ;{26}Al;{g} have underscored the need for accurate nuclear information concerning the stellar production of (60)Fe. In light of this motivation, a first measurement of the stellar (60)Fe(n, gamma)(61)Fe cross section, the predominant destruction mechanism of (60)Fe, has been performed by activation at the Karlsruhe Van de Graaff accelerator. Results show a Maxwellian averaged cross section at kT = 25 keV of 9.9 +/-_{1.4(stat)};{2.8(syst)}mbarn, a significant reduction in uncertainty with respect to existing theoretical discrepancies. This result will serve to significantly constrain models of (60)Fe nucleosynthesis in massive stars.
authors.affiliation: University of Notre Dame, Department of Physics, Notre Dame, Indiana, USA.
authors.forename: E
authors.initials: E
authors.lastname: Uberseder
authors.forename: R
authors.initials: R
authors.lastname: Reifarth
authors.forename: D
authors.initials: D
authors.lastname: Schumann
authors.forename: I
authors.initials: I
authors.lastname: Dillmann
authors.forename: C Domingo
authors.initials: CD
authors.lastname: Pardo
authors.forename: J
authors.initials: J
authors.lastname: Görres
authors.forename: M
authors.initials: M
authors.lastname: Heil
authors.forename: F
authors.initials: F
authors.lastname: Käppeler
authors.forename: J
authors.initials: J
authors.lastname: Marganiec
authors.forename: J
authors.initials: J
authors.lastname: Neuhausen
authors.forename: M
authors.initials: M
authors.lastname: Pignatari
authors.forename: F
authors.initials: F
authors.lastname: Voss
authors.forename: S
authors.initials: S
authors.lastname: Walter
authors.forename: M
authors.initials: M
authors.lastname: Wiescher