First Experimental Measurement of the {sup 18}O(p,{alpha}){sup 15}N Reaction at Astrophysical Energies
- University of Catania and INFN-LNS, Catania (Italy)
- Cyclotron Institute, Texas A and M University, College Station, Texas (United States)
- CSNSM CNRS/IN2P3, Orsay (France)
- GIK-Institute of Engineering Sciences and Technology, Topi (Pakistan)
- Kore University, Enna (Italy) and INFN-LNS, Catania (Italy)
The {sup 18}O(p,{alpha}){sup 15}N and {sup 17}O(p,{alpha}){sup 14}N 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 {sup 2}H({sup 18}O,{alpha}{sup 15}N)n and {sup 2}H({sup 17}O,{alpha}{sup 14}N)n reactions to deduce the {sup 18}O(p,{alpha}){sup 15}N and {sup 17}O(p,{alpha}){sup 14}N cross sections at low energies. Resonances in the {sup 18}O(p,{alpha}){sup 15}N and {sup 17}O(p,{alpha}){sup 14}N excitation functions have been studied and the resonance parameters deduced.
- OSTI ID:
- 21506870
- Journal Information:
- AIP Conference Proceedings, Vol. 1304, Issue 1; Conference: Carpathian summer school of physics - Exotic nuclei and nuclear/particle astrophysics (III): From nuclei to stars, Sinaia (Romania), 20 Jun - 3 Jul 2010; Other Information: DOI: 10.1063/1.3527227; (c) 2010 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALPHA DECAY
ASYMPTOTIC SOLUTIONS
DEUTERIUM TARGET
EXCITATION FUNCTIONS
FORECASTING
ISOTOPE RATIO
METEORITES
NEUTRONS
NITROGEN 14
NITROGEN 15
NOVAE
NUCLEOSYNTHESIS
OXYGEN 17 REACTIONS
OXYGEN 17 TARGET
OXYGEN 18 REACTIONS
OXYGEN 18 TARGET
PROTON REACTIONS
RESONANCE
SIMULATION
WHITE DWARF STARS
BARYON REACTIONS
BARYONS
BINARY STARS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DECAY
DIFFERENTIAL CROSS SECTIONS
DIMENSIONLESS NUMBERS
DWARF STARS
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
FUNCTIONS
HADRON REACTIONS
HADRONS
HEAVY ION REACTIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL SOLUTIONS
NITROGEN ISOTOPES
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
STABLE ISOTOPES
STARS
SYNTHESIS
TARGETS
VARIABLE STARS