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Precision study of ground state capture in the 14N(p,γ)15O reaction
Forschungszentrum Dresden-Rossendorf.
Istituto Nazionale di Fisica Nucleare (INFN).
Institute of Nuclear Research (ATOMKI), Debrecen.
Forschungszentrum Dresden-Rossendorf.
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Number of Authors: 312008 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 78, no 2, article id 22802Article in journal (Refereed) Published
Abstract [en]

The rate of the hydrogen-burning carbon-nitrogen-oxygen (CNO) cycle is controlled by the slowest process, 14N(p,γ)15O, which proceeds by capture to the ground and several excited states in O15. Previous extrapolations for the ground state contribution disagreed by a factor 2, corresponding to 15% uncertainty in the total astrophysical S factor. At the Laboratory for Underground Nuclear Astrophysics (LUNA) 400 kV accelerator placed deep underground in the Gran Sasso facility in Italy, a new experiment on ground state capture has been carried out at 317.8, 334.4, and 353.3 keV center-of-mass energy. Systematic corrections have been reduced considerably with respect to previous studies by using a Clover detector and by adopting a relative analysis. The previous discrepancy has been resolved, and ground state capture no longer dominates the uncertainty of the total S factor. © 2008 The American Physical Society.

Place, publisher, year, edition, pages
2008. Vol. 78, no 2, article id 22802
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Experimental Physics
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URN: urn:nbn:se:ltu:diva-4910DOI: 10.1103/PhysRevC.78.022802Scopus ID: 2-s2.0-50649086788Local ID: 2e7e296f-a77d-4ac0-9ca3-e22d3e25aa0eOAI: oai:DiVA.org:ltu-4910DiVA, id: diva2:977784
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Upprättat; 2008; 20141211 (albvom)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-08-20Bibliographically approved

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