High accuracy {sup 18}O(p,{alpha}){sup 15}N reaction rate in the 8{center_dot}10{sup 6}-5{center_dot}10{sup 9} K temperature range

Journal Article · Fri Oct 28 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3628378· OSTI ID:21612048

La Cognata, M; Spitaleri, C; Cherubini, S; Crucilla, V; Gulino, M; Kiss, G G; Lamia, L; Pizzone, R G; Puglia, S M. R.; Rapisarda, G G; Romano, S; Sergi, M L ^[1]; Mukhamedzhanov, A; Banu, A; Goldberg, V; Tabacaru, G; Trache, L; Tribble, R E ^[2]; Coc, A ^[3]; Irgaziev, B ^[4]

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1. INFN - Laboratori Nazionali del Sud and DMFCI - Universita di Catania, Catania (Italy)
2. Cyclotron Institute - Texas A and M University, College Station, TX (United States)
3. CSNSM CNRS/IN2P3, Universite Paris Sud, Orsay France (France)
4. GIK - Institute of Engineering Sciences and Technology, Topi District (Pakistan)

The {sup 18}O(p,{alpha}){sup 15}N reaction is of great importance in several astrophysical scenarios, as it influences the production of key isotopes such as {sup 19}F, {sup 18}O and {sup 15}N. In this work, a high accuracy {sup 18}O(p,{alpha}){sup 15}N 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{sup +} resonance. Since {Gamma}{approx}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{approx}0.5 10{sup 9} K based over our new improved determination of its resonance parameters.

• OSTI ID: 21612048
• Journal Information: AIP Conference Proceedings, Vol. 1377, Issue 1; Conference: FINUSTAR 3 Conference on frontiers in nuclear structure, astrophysics, and reactions, Rhodes (Greece), 23-27 Aug 2010; Other Information: DOI: 10.1063/1.3628378; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ALPHA PARTICLES
ASTROPHYSICS
CROSS SECTIONS
ENERGY DEPENDENCE
FLUORINE 19
IONIZATION CHAMBERS
KEV RANGE
NITROGEN 15
NUCLEAR REACTION KINETICS
NUCLEAR TEMPERATURE
NUCLEOSYNTHESIS
OXYGEN 18
OXYGEN 18 TARGET
POSITION SENSITIVE DETECTORS
PROTON REACTIONS
RESONANCE
BARYON REACTIONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
ENERGY RANGE
EVEN-EVEN NUCLEI
FLUORINE ISOTOPES
HADRON REACTIONS
IONIZING RADIATIONS
ISOTOPES
KINETICS
LIGHT NUCLEI
MEASURING INSTRUMENTS
NITROGEN ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
OXYGEN ISOTOPES
PHYSICS
RADIATION DETECTORS
RADIATIONS
REACTION KINETICS
STABLE ISOTOPES
SYNTHESIS
TARGETS