Resonance strengths in the {sup 14}N(p,gamma){sup 15}O and {sup 15}N(p,alphagamma){sup 12}C reactions

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.055807· OSTI ID:21389077

Marta, Michele; Trompler, Erik; Bemmerer, Daniel; Beyer, Roland; Grosse, Eckart; Hannaske, Roland; Junghans, Arnd R; Nair, Chithra; Schwengner, Ronald; Wagner, Andreas; Yakorev, Dmitry ^[1]; Broggini, Carlo; Caciolli, Antonio; Erhard, Martin; Menegazzo, Roberto ^[2]; Fueloep, Zsolt; Gyuerky, Gyoergy ^[3]; Szuecs, Tamas ^[1]; Vezzu, Simone ^[4]

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1. Forschungszentrum Dresden-Rossendorf (FZD), Dresden (Germany)
2. Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Padova, Padova (Italy)
3. Institute of Nuclear Research (ATOMKI), Debrecen (Hungary)
4. Coordinamento Interuniversitario Veneto per le Nanotechnologie (CIVEN), Venice (Italy)

The {sup 14}N(p,gamma){sup 15}O reaction is the slowest reaction of the carbon-nitrogen-oxygen cycle of hydrogen burning in stars. As a consequence, it determines the rate of the cycle. The {sup 15}N(p,alphagamma){sup 12}C reaction is frequently used in inverse kinematics for hydrogen depth profiling in materials. The {sup 14}N(p,gamma){sup 15}O and {sup 15}N(p,alphagamma){sup 12}C reactions have been studied simultaneously, using titanium nitride targets of natural isotopic composition and a proton beam. The strengths of the resonances at E{sub p} = 1058 keV in {sup 14}N(p,gamma){sup 15}O and at E{sub p} = 897 and 430 keV in {sup 15}N(p,alphagamma){sup 12}C have been determined with improved precision, relative to the well-known resonance at E{sub p} = 278 keV in {sup 14}N(p,gamma){sup 15}O. The new recommended values are omegagamma=0.353+-0.018, 362+-20, and 21.9+-1.0 eV for their respective strengths. In addition, the branching ratios for the decay of the E{sub p} = 1058 keV resonance in {sup 14}N(p,gamma){sup 15}O have been redetermined. The data reported here should facilitate future studies of off-resonant capture in the {sup 14}N(p,gamma){sup 15}O reaction that are needed for an improved R-matrix extrapolation of the cross section. In addition, the data on the 430 keV resonance in {sup 15}N(p,alphagamma){sup 12}C may be useful for hydrogen depth profiling.

• OSTI ID: 21389077
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevC.81.055807; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
BRANCHING RATIO
CAPTURE
CARBON 12
CROSS SECTIONS
EXTRAPOLATION
GAMMA DECAY
HYDROGEN BURNING
ISOTOPE RATIO
KEV RANGE
NITROGEN 14
NITROGEN 15
NUCLEAR DECAY
OXYGEN 15
PROTON BEAMS
PROTON REACTIONS
R MATRIX
RESONANCE
TITANIUM NITRIDES
BARYON REACTIONS
BEAMS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
DECAY
DIMENSIONLESS NUMBERS
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HADRON REACTIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL SOLUTIONS
MATRICES
MINUTES LIVING RADIOISOTOPES
NITRIDES
NITROGEN COMPOUNDS
NITROGEN ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON BEAMS
NUCLEON REACTIONS
NUMERICAL SOLUTION
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN ISOTOPES
PARTICLE BEAMS
PNICTIDES
RADIOISOTOPES
STABLE ISOTOPES
STAR BURNING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS