Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phrvc..77e5801s&link_type=abstract
Physical Review C, vol. 77, Issue 5, id. 055801
Astronomy and Astrophysics
Astrophysics
4
Nucleosynthesis In Late Stellar Evolution, Resonance Reactions, 3H-, 3He-, And 4He-Induced Reactions, 20<=A<=38
Scientific paper
The reaction Mg24(α,γ)Si28 is involved in the nucleosynthesis of Mg24 and Si28 in massive stars. The reaction has not been examined with sufficient sensitivity at α-particle energies below 1.5 MeV. Several Si28 states appear favorable for formation by this reaction in the α-particle energy range of 1.0 1.5 MeV, motivating a new study of this reaction at the University of Notre Dame. To maximize experimental sensitivity, a high efficiency coincidence detection system was developed. Several previously unknown resonances were observed between 1.1 and 1.5 MeV, and an upper limit for any lower energy resonances was obtained. Resonance parameters were determined and reaction rates were calculated. The astrophysical implications of these results are discussed.
Azuma Ryuzo
Beard Mary
Buchmann Lothar
Costantini Heide
Couder Manoel
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