Lowest excited states ofO13
Citations Over TimeTop 11% of 2007 papers
Abstract
An excitation function for resonance elastic scattering of $p+$$^{12}\mathrm{N}$ was measured in the center of mass energy range of 0.8--2.7 MeV. Measurements were performed using inverse kinematics and the thick-target techniques. The data were analyzed in the framework of the R-matrix formalism. A definitive spin and parity assignment was possible for the first excited state of $^{13}\mathrm{O}$ at an excitation energy of 2.69 MeV as ${\mathrm{J}}^{\ensuremath{\pi}}={\frac{1}{2}}^{+}$. An indication of the presence of a new level in $^{13}\mathrm{O}$ at an excitation energy of 3.29 MeV with tentative spin-parity assignment ${\mathrm{J}}^{\ensuremath{\pi}}={\frac{1}{2}}^{\ensuremath{-}}$ or ${\frac{3}{2}}^{\ensuremath{-}}$ was obtained. We evaluate the impact of this measurement on the reaction rate of $^{12}\mathrm{N}$($p$,\ensuremath{\gamma})$^{13}\mathrm{O}$ for nucleosynthesis in low-metallicity stars.
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