First experimental measurement of the 18O(p,α) 15N reaction at astrophysical energies

M. La Cognata, M. L. Sergi, C. Spitaleri, A. Mukhamedzhanov, A. Coc, S. Cherubini, V. Goldberg, M. Gulino, F. Hammache, B. Irgaziev, G. Kiss, L. Lamia, R. G. Pizzone, S. Romano, N. De Sereville, R. Tribble, A. Tumino

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

Abstract

The 18O(p,α)15N and 17O(p,α) 14N reactions are of primary importance in several as-trophysical scenarios, including nucleosynthesis inside Asymptotic Giant Branch stars and oxygen and nitrogen isotopic ratios in meteorite grains. They are also key reactions to understand exotic systems such as R-Coronae Borealis stars and novae. Thus, the measurement of their cross sections in the low energy region can be crucial to reduce the nuclear uncertainty on theoretical predictions, because the resonance parameters are poorly determined. The Trojan Horse Method, in its newly developed form particularly suited to investigate low-energy resonances, has been applied to the 2H(18O, α15N)n and 2H(17O,α14N)n reactions to deduce the 18O(p,α)15N and 17O(p,α)14N cross sections at low energies. Resonances in the 18O(p,α)15N and 17O(p,α)14N excitation functions have been studied and the resonance parameters deduced.

Original languageEnglish
Title of host publicationExotic Nuclei and Nuclear/Particle Astrophysics (III)
Subtitle of host publicationFrom Nuclei to Stars - Carpathian Summer School of Physics 2010, CSSP10
Pages379-381
Number of pages3
DOIs
Publication statusPublished - Dec 1 2010
EventCarpathian Summer School of Physics 2010: Exotic Nuclei and Nuclear/Particle Astrophysics (III). From Nuclei to Stars, CSSP10 - Sinaia, Romania
Duration: Jun 20 2010Jul 3 2010

Publication series

NameAIP Conference Proceedings
Volume1304
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceCarpathian Summer School of Physics 2010: Exotic Nuclei and Nuclear/Particle Astrophysics (III). From Nuclei to Stars, CSSP10
CountryRomania
CitySinaia
Period6/20/107/3/10

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Keywords

  • Indirect methods resonant reactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

La Cognata, M., Sergi, M. L., Spitaleri, C., Mukhamedzhanov, A., Coc, A., Cherubini, S., Goldberg, V., Gulino, M., Hammache, F., Irgaziev, B., Kiss, G., Lamia, L., Pizzone, R. G., Romano, S., De Sereville, N., Tribble, R., & Tumino, A. (2010). First experimental measurement of the 18O(p,α) 15N reaction at astrophysical energies. In Exotic Nuclei and Nuclear/Particle Astrophysics (III): From Nuclei to Stars - Carpathian Summer School of Physics 2010, CSSP10 (pp. 379-381). (AIP Conference Proceedings; Vol. 1304). https://doi.org/10.1063/1.3527227