High accuracy 18O(p,α)15N reaction rate in the 8·106-5·109K temperature range

M. La Cognata, C. Spitaleri, A. Mukhamedzhanov, A. Banu, S. Cherubini, A. Coc, V. Crucillà, V. Goldberg, M. Gulino, B. Irgaziev, G. G. Kiss, L. Lamia, J. Mrazek, R. G. Pizzone, S. M.R. Puglia, G. G. Rapisarda, S. Romano, M. L. Sergi, G. Tabacaru, L. TracheR. E. Tribble, W. Trzaska, A. Tumino

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The 18O(p,α)15N reaction is of great importance in several astrophysical scenarios, as it influences the production of key isotopes such as 19F, 18O and 15N. In this work, a high accuracy 18O(p,α)15N reaction rate is proposed, based on the simultaneous fit of direct measurements and of the results of a new Trojan Horse experiment. In particular, we have focused on the study of the broad 660 keV 1/2+ resonance. Since Γ∼100-300 keV, it strongly influences the nearly-zero-energy region of the cross section by means of the low-energy tail of the resonant contribution and dominates the cross section at higher energies. Here we provide a factor of 2 larger reaction rate above T∼0.5109K based over our new improved determination of its resonance parameters.

Original languageEnglish
Title of host publicationFrontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3
Pages195-199
Number of pages5
DOIs
Publication statusPublished - Jan 1 2011
Event3rd International Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3 - Rhodes, Greece
Duration: Aug 23 2010Aug 27 2010

Publication series

NameAIP Conference Proceedings
Volume1377
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other3rd International Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3
CountryGreece
CityRhodes
Period8/23/108/27/10

Keywords

  • abundances - stars: abundances - stars: AGB and post-AGB
  • nuclear reactions
  • nucleosynthesis

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    La Cognata, M., Spitaleri, C., Mukhamedzhanov, A., Banu, A., Cherubini, S., Coc, A., Crucillà, V., Goldberg, V., Gulino, M., Irgaziev, B., Kiss, G. G., Lamia, L., Mrazek, J., Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S., Sergi, M. L., Tabacaru, G., ... Tumino, A. (2011). High accuracy 18O(p,α)15N reaction rate in the 8·106-5·109K temperature range. In Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3 (pp. 195-199). (AIP Conference Proceedings; Vol. 1377). https://doi.org/10.1063/1.3628378