6533b7d8fe1ef96bd12697ba
RESEARCH PRODUCT
High accuracy [sup 18]O(p,α)[sup 15]N reaction rate in the 8⋅10[sup 6]–5⋅10[sup 9] K temperature range
M. La CognataC. SpitaleriA. MukhamedzhanovA. BanuS. CherubiniA. CocV. CrucillàV. GoldbergM. GulinoB. IrgazievG. G. KissL. LamiaJ. MrazekR. G. PizzoneS. M. R. PugliaG. G. RapisardaS. RomanoM. L. SergiG. TabacaruL. TracheR. E. TribbleW. TrzaskaA. TuminoParaskevi DemetriouRauno JulinSotirios Harissopulossubject
Chemical kineticsNuclear reactionReaction rateNuclear physicsCross section (physics)NucleosynthesisChemistryResonanceAlpha particleAtomic physicsCharged particledescription
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∼0.5 109 K based over our new improved determination of its resonance parameters.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 | AIP Conference Proceedings |