Skip to Main content Skip to Navigation
Journal articles

The fluorine destruction in stars: first experimental study of the (19)F(p, alpha(0))(16)O reaction at astrophysical energies

M. La Cognata A.M. Mukhamedzhanov C. Spitaleri I. Indelicato M. Aliotta V. Burjan S. Cherubini A. Coc 1 M. Gulino Z. Hons G.G. Kiss V. Kroha L. Lamia J. Mrazek S. Palmerini S. Piskor R.G. Pizzone S.M.R. Puglia G.G Rapisarda S. Romano M.L. Sergi A. Tumino
1 CSNSM AN
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
Abstract : The (19)F(p, alpha)(16)O reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogen-deficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach the energy region of astrophysical interest (E(cm) less than or similar to 300 keV), because of the hindrance effect of the Coulomb barrier. The Trojan Horse (TH) method was thus used to access this energy region, by extracting the quasi-free contribution to the (2)H((19)F, alpha(16)O)n and the (19)F((3)He, alpha(16)O)d reactions. The TH measurement of the alpha(0) channel shows the presence of resonant structures not observed before, which cause an increase of the reaction rate at astrophysical temperatures up to a factor of 1.7, with potential consequences for stellar nucleosynthesis.
Keywords : nuclear reactions abundances stars: abundances stars: AGB and post-AGB ASYMPTOTIC GIANT BRANCH CORONAE-BOREALIS STARS NUCLEAR ASTROPHYSICS COULOMB BARRIER CROSS-SECTION LOW-MASS RANGE RELEVANT NUCLEOSYNTHESIS CARBON
Document type :
Journal articles
Complete list of metadatas
http://hal.in2p3.fr/in2p3-00631319
Contributor : Christine Hadrossek <>
Submitted on : Wednesday, October 12, 2011 - 9:57:31 AM
Last modification on : Friday, November 27, 2020 - 11:24:20 AM

Identifiers

Collections

IN2P3 | CSNSM | CNRS

Citation

M. La Cognata, A.M. Mukhamedzhanov, C. Spitaleri, I. Indelicato, M. Aliotta, et al.. The fluorine destruction in stars: first experimental study of the (19)F(p, alpha(0))(16)O reaction at astrophysical energies. The Astrophysical journal letters, Bristol : IOP Publishing, 2011, 739, pp.L54. ⟨10.1088/2041-8205/739/2/L54⟩. ⟨in2p3-00631319⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

112