The {sup 14}N(p,{gamma}){sup 15}O reaction studied with a composite germanium detector

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.045804· OSTI ID:21499630

Marta, M; Bemmerer, D ^[1]; Formicola, A; Gustavino, C; Junker, M ^[2]; Broggini, C; Menegazzo, R; Rossi Alvarez, C ^[3]; Caciolli, A ^[3]; Corvisiero, P; Costantini, H; Lemut, A; Prati, P ^[4]; Elekes, Z; Fueloep, Zs; Gyuerky, Gy; Somorjai, E ^[5]; Gervino, G ^[6]; Guglielmetti, A; Mazzocchi, C ^[7]

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1. Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, D-01328 Dresden (Germany)
2. INFN, Laboratori Nazionali del Gran Sasso (LNGS), Assergi (AQ) (Italy)
3. Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Padova, via Marzolo 8, I-35131 Padova (Italy)
4. Universita di Genova and INFN Sezione di Genova, Genova (Italy)
5. Institute of Nuclear Research (ATOMKI), Debrecen (Hungary)
6. Dipartimento di Fisica Sperimentale, Universita di Torino and INFN Sezione di Torino, Torino (Italy)
7. Universita degli Studi di Milano and INFN, Sezione di Milano (Italy)

The rate of the carbon-nitrogen-oxygen (CNO) cycle of hydrogen burning is controlled by the {sup 14}N(p,{gamma}){sup 15}O reaction. The reaction proceeds by capture to the ground states and several excited states in {sup 15}O. In order to obtain a reliable extrapolation of the excitation curve to astrophysical energy, fits in the R-matrix framework are needed. In an energy range that sensitively tests such fits, new cross-section data are reported here for the four major transitions in the {sup 14}N(p,{gamma}){sup 15}O reaction. The experiment has been performed at the Laboratory for Underground Nuclear Astrophysics (LUNA) 400-kV accelerator placed deep underground in the Gran Sasso facility in Italy. Using a composite germanium detector, summing corrections have been considerably reduced with respect to previous studies. The cross sections for capture to the ground state and to the 5181, 6172, and 6792 keV excited states in {sup 15}O have been determined at 359, 380, and 399 keV beam energy. In addition, the branching ratios for the decay of the 278-keV resonance have been remeasured.

• OSTI ID: 21499630
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 4; Other Information: DOI: 10.1103/PhysRevC.83.045804; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
BRANCHING RATIO
CAPTURE
CNO CYCLE
CORRECTIONS
CROSS SECTIONS
EXCITATION
EXCITED STATES
EXTRAPOLATION
GAMMA DECAY
GE SEMICONDUCTOR DETECTORS
GROUND STATES
HYDROGEN BURNING
KEV RANGE
NITROGEN 14 TARGET
OXYGEN 15
PROTON REACTIONS
R MATRIX
RESONANCE
UNDERGROUND
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
DECAY
DIMENSIONLESS NUMBERS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
HADRON REACTIONS
ISOTOPES
LEVELS
LIGHT NUCLEI
MATHEMATICAL SOLUTIONS
MATRICES
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL SOLUTION
OXYGEN ISOTOPES
PHYSICS
RADIATION DETECTORS
RADIOISOTOPES
SEMICONDUCTOR DETECTORS
STAR BURNING
TARGETS