Radiative capture reaction for 17Ne formation within a full three-body model

10 pags.; 10 figs.; 1 tab.Purpose: Determine the three-body radiative capture reaction rate for 17 Ne formation including sequential and direct, resonant and nonresonant contributions on an equal footing. Method: Two different discretization methods have been applied to generate 17Ne states in a full three-body model: the analytical transformed harmonic oscillator method and the hyperspherical adiabatic expansion method. The binary p−15O interaction has been adjusted to reproduce the known spectrum of the unbound 16F nucleus. The dominant E1 contributions to the 15O(2p,γ)17Ne reaction rate have been calculated from the inverse photodissociation process. Results: Three-body calculations provide a reliable description of 17Ne states. The agreement with the available experimental data on 17Ne is discussed. It is shown that the 15O(2p,γ)17Ne reaction rates computed within the two methods agree in a broad range of temperatures. The present calculations are compared with a previous theoretical estimation of the reaction rate. Conclusions: It is found that the full three-body model provides a reaction rate several orders of magnitude larger than the only previous estimation. The implications for the rp-process in type I x-ray bursts should be investigated.This work has been partially supported by the Spanish Ministerio de Economıa y Competitividad under Projects No. FIS2014-53448-c2-1-P, No. FIS2014-51941-P, and No. FIS2014-51971-P and by Junta de Andalucía under Group No. FQM-160 and Project No. P11-FQM-7632. J. Casal acknowledges support from the Ministerio de Educación, Cultura y Deporte, FPU Research Grant No. AP2010-3124. M. Rodríguez-Gallardo acknowledges postdoctoral support from the Universidad de Sevilla under the V Plan Propio de Investigacion, Contract No. USE-11206-M. R. de Diego acknowledges support by the Fundacao para a Ciencia e a Tecnologia (FCT) through Grant No. SFRH/BPD/78606/2011.Peer Reviewe