Measurement of the {sup 60}Fe(n,{gamma}){sup 61}Fe Cross Section at Stellar Temperatures
- University of Notre Dame, Department of Physics, Notre Dame, Indiana (United States)
- GSI Darmstadt, Planckstrasse 1, 64291 Darmstadt (Germany)
- Laboratory for Environmental and Radiochemistry, PSI, 5232 Villigen PSI (Switzerland)
- Forschungszentrum Karlsruhe, Institut fuer Kernphysik, Postfach 3640, D-76021 Karlsruhe (Germany)
- Keele University, Keele, Staffordshire ST5 5BG (United Kingdom)
Observations of galactic {gamma}-ray activity have challenged the current understanding of nucleosynthesis in massive stars. Recent measurements of {sup 60}Fe abundances relative to {sup 26}Al{sup g} have underscored the need for accurate nuclear information concerning the stellar production of {sup 60}Fe. In light of this motivation, a first measurement of the stellar {sup 60}Fe(n,{gamma}){sup 61}Fe cross section, the predominant destruction mechanism of {sup 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{+-}{sub 1.4(stat)}{sup 2.8(syst)}mbarn, a significant reduction in uncertainty with respect to existing theoretical discrepancies. This result will serve to significantly constrain models of {sup 60}Fe nucleosynthesis in massive stars.
- OSTI ID:
- 21180370
- Journal Information:
- Physical Review Letters, Vol. 102, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.102.151101; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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