6533b85dfe1ef96bd12be8f2
RESEARCH PRODUCT
A novel approach to measure the cross section of the 18O(p, α)15N resonant reaction in the 0-200 keV energy range
M. L. SergiM. L. SergiA. M. MukhamedzhanovR. G. PizzoneA. BanuJ. MrazekS. RomanoGabor KissA. CocWladyslaw Henryk TrzaskaV. Z. GoldbergG. TabacaruL. LamiaR. E. TribbleV. CrucillàG. G. RapisardaB. F. IrgazievM. La CognataM. La CognataLivius TracheAurora TuminoSilvio CherubiniMarisa GulinoClaudio SpitaleriS. M. R. Pugliasubject
Nuclear reactionstars: abundances7. Clean energy01 natural sciencesReaction rateNuclear physicsNucleosynthesis0103 physical sciencesAsymptotic giant branchAstrophysics::Solar and Stellar AstrophysicsNuclear Experiment010303 astronomy & astrophysicsnuclear reactionsPhysics010308 nuclear & particles physicsabundances[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]stars: AGB and post-AGB Online-only material: color figuresnucleosynthesisAstronomy and AstrophysicsAlpha particle[PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]Charged particleStars13. Climate actionSpace and Planetary ScienceAtomic physicsDimensionless quantitydescription
The 18O(p, ?)15N reaction is of primary importance to pin down the uncertainties, due to nuclear physics input, affecting present-day models of asymptotic giant branch stars. Its reaction rate can modify both fluorine nucleosynthesis inside such stars and oxygen and nitrogen isotopic ratios, which allow one to constrain the proposed astrophysical scenarios. Thus, an indirect measurement of the low-energy region of the 18O(p, ?)15N reaction has been performed to access, for the first time, the range of relevance for astrophysical application. In particular, a full, high-accuracy spectroscopic study of the 20 and 90 keV resonances has been performed and the strengths deduced to evaluate the reaction rate and the consequences for astrophysics.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-12-15 |