Lowest excited states of O13
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An excitation function for resonance elastic scattering of p+N12 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 O13 at an excitation energy of 2.69 MeV as Jπ=12+. An indication of the presence of a new level in O13 at an excitation energy of 3.29 MeV with tentative spin-parity assignment Jπ=12- or 32- was obtained. We evaluate the impact of this measurement on the reaction rate of N12(p,γ)O13 for nucleosynthesis in low-metallicity stars. © 2007 The American Physical Society.
author list (cited authors)
Skorodumov, B. B., Rogachev, G. V., Boutachkov, P., Aprahamian, A., Goldberg, V. Z., Mukhamedzhanov, A., ... Woehr, A.