Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002asap.conf....1k&link_type=abstract
ASTROPHYSICS, SYMMETRIES, AND APPLIED PHYSICS AT SPALLATION NEUTRON SOURCES. Proceedings of the Workshop on ASAP 2002. Held 11-1
Astronomy and Astrophysics
Astrophysics
Scientific paper
Neutron reactions are responsible for the formation of the elements heavier than iron. The corresponding scenarios relate to helium burning in Red Giant stars (s process) and to supernova explosions (r and p process). The status of the relevant neutron data for the various scenarios are briefly summarized, followed by an outline of the essential experimental techniques. The direct impact of laboratory results on the interpretation of the observed abundance patterns and their role as crucial tests for astrophysical models are illustrated by representative examples. The very high flux at spallation neutron sources provide a unique possibility for investigating numerous difficult and hitherto inaccessible cases, in particular cross sections of the important radioactive nuclei. In combination with advanced detector concepts these facilities provide a promising step towards a quantitative picture of galactic chemical evolution.
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