Constraining the S factor of {sup 15}N(p,{gamma}){sup 16}O at astrophysical energies

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.055804· OSTI ID:21499220

LeBlanc, P J; Goerres, J; Beard, M; Best, A; Couder, M; Boer, R de; Kontos, A; Li, Q; O'Brien, S; Palumbo, A; Stech, E; Tan, W; Uberseder, E; Wiescher, M ^[1]; Imbriani, G ^[1]; Junker, M; Formicola, A; Gustavino, C ^[2]; Azuma, R ^[1]; Bemmerer, D ^[3]

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1. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
2. Laboratori Nazionali del Gran Sasso (LNGS), INFN, Assergi (Italy)
3. Forschungszentrum Dresden, Rossendorf, Dresden (Germany)

The {sup 15}N(p,{gamma}){sup 16}O reaction represents a breakout reaction linking the first and second cycles of the CNO cycles redistributing the carbon and nitrogen abundances into the oxygen range. The reaction is dominated by two broad resonances, at E{sub p}=338 and 1028 keV, and a direct capture contribution to the ground state of {sup 16}O. Interference effects between these contributions both in the low-energy region (E{sub p}<338 keV) and between the two resonances (338<E{sub p}<1028 keV) can dramatically affect the extrapolation to energies of astrophysical interest. To facilitate a reliable extrapolation, the {sup 15}N(p,{gamma}){sup 16}O reaction has been remeasured covering the energy range from E{sub p}=1800 keV down to 130 keV. The results have been analyzed in the framework of a multilevel R-matrix theory and an S(0) value of 39.6 keV b has been found.

• OSTI ID: 21499220
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevC.82.055804; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABUNDANCE
ASTROPHYSICS
CAPTURE
CARBON
CNO CYCLE
COVERINGS
EXTRAPOLATION
GAMMA DECAY
INTERFERENCE
KEV RANGE
LIMITING VALUES
NITROGEN
NITROGEN 15 TARGET
OXYGEN
OXYGEN 16
PROTON REACTIONS
R MATRIX
RESONANCE
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
DECAY
ELEMENTS
ENERGY RANGE
EVEN-EVEN NUCLEI
HADRON REACTIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL SOLUTIONS
MATRICES
NONMETALS
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL SOLUTION
OXYGEN ISOTOPES
PHYSICS
STABLE ISOTOPES
STAR BURNING
TARGETS