Two-proton capture on the Se-68 nucleus with a new self-consistent cluster model

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  • D. Hove
  • ,
  • E. Garrido, CSIC, Autonomous University of Barcelona, Consejo Superior de Investigaciones Cientificas (CSIC), IEM
  • ,
  • A. S. Jensen
  • P. Sarriguren, CSIC, Autonomous University of Barcelona, Consejo Superior de Investigaciones Cientificas (CSIC), IEM
  • ,
  • H. O. U. Fynbo
  • D. V. Fedorov
  • N. T. Zinner

We investigate the two-proton capture reaction of the prominent rapid proton capture waiting point nucleus, Se-68, that produces the borromean nucleus Kr-70 (Se-68+ p + p). We apply a recently formulated general model where the core nucleus, Se-68, is treated in the mean-field approximation and the threebody problem of the two valence protons and the core is solved exactly. We compare using two popular Skyrme interactions, SLy4 and SkM*. We calculate E2 electromagnetic two-proton dissociation and capture cross sections, and derive the temperature dependent capture rates. We vary the unknown 2(+) resonance energy without changing any of the structures computed self-consistently for both core and valence particles. We find rates increasing quickly with temperature below 2-4 GK after which we find rates varying by about a factor of two independent of 2(+) resonance energy. The capture mechanism is sequential through the f(5/2) proton-core resonance, but the continuum background contributes significantly. (C) 2018 The Authors. Published by Elsevier B.V.

Original languageEnglish
JournalPhysics Letters B: Particle Physics, Nuclear Physics and Cosmology
Pages (from-to)42-46
Number of pages5
Publication statusPublished - 10 Jul 2018

    Research areas

  • rp-Process, Capture rate, Electric dissociation, Three-body, Mean-field, RP-PROCESS, LIMITS, PARAMETRIZATION, STABILITY

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