Abstract
The () 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 () reaction is frequently used in inverse kinematics for hydrogen depth profiling in materials. The () and () reactions have been studied simultaneously, using titanium nitride targets of natural isotopic composition and a proton beam. The strengths of the resonances at keV in (,) and at and keV in (,) have been determined with improved precision, relative to the well-known resonance at keV in (,). The new recommended values are , , and eV for their respective strengths. In addition, the branching ratios for the decay of the keV resonance in (,) have been redetermined. The data reported here should facilitate future studies of off-resonant capture in the (,) reaction that are needed for an improved -matrix extrapolation of the cross section. In addition, the data on the keV resonance in (,) may be useful for hydrogen depth profiling.
1 More- Received 24 March 2010
DOI:https://doi.org/10.1103/PhysRevC.81.055807
©2010 American Physical Society