A NOVEL APPROACH TO MEASURE THE CROSS SECTION OF THE {sup 18}O(p, alpha){sup 15}N RESONANT REACTION IN THE 0-200 keV ENERGY RANGE

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/708/1/796· OSTI ID:21392447

La Cognata, M; Spitaleri, C; Cherubini, S; Crucilla, V; Gulino, M; 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 ^[2]; Coc, A ^[3]; Irgaziev, B ^[4]; Kiss, G G ^[5]; Mrazek, J ^[6]

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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)
4. GIK - Institute of Engineering Sciences and Technology, Topi District, Swabi NWFP (Pakistan)
5. ATOMKI, Debrecen (Hungary)
6. Nuclear Physics Institute of ASCR, Rez (Czech Republic)

The {sup 18}O(p, alpha){sup 15}N 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 {sup 18}O(p, alpha){sup 15}N 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.

• OSTI ID: 21392447
• Journal Information: Astrophysical Journal, Vol. 708, Issue 1; Other Information: DOI: 10.1088/0004-637X/708/1/796; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABUNDANCE
ALPHA PARTICLES
ASTROPHYSICS
ASYMPTOTIC SOLUTIONS
CROSS SECTIONS
ISOTOPE RATIO
KEV RANGE
NITROGEN
NITROGEN 15
NUCLEAR PHYSICS
NUCLEOSYNTHESIS
OXYGEN
OXYGEN 18 TARGET
PROTON REACTIONS
REACTION KINETICS
STARS
BARYON REACTIONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DIMENSIONLESS NUMBERS
ELEMENTS
ENERGY RANGE
HADRON REACTIONS
IONIZING RADIATIONS
ISOTOPES
KINETICS
LIGHT NUCLEI
MATHEMATICAL SOLUTIONS
NITROGEN ISOTOPES
NONMETALS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
PHYSICS
RADIATIONS
STABLE ISOTOPES
SYNTHESIS
TARGETS