Two-proton capture on the $^{68}$Se nucleus with a new self-consistent cluster model
Abstract
We investigate the two-proton capture reaction of the prominent rapid proton capture waiting point nucleus, Se, that produces the borromean nucleus Kr (Se). We apply a recently formulated general model where the core nucleus, Se, is treated in the mean-field approximation and the three-body problem of the two valence protons and the core is solved exactly. The same Skyrme interaction is used to find core-nucleon and core valence-proton interactions. We calculate electromagnetic two-proton dissociation and capture cross sections, and derive the temperature dependent capture rates. We vary the unknown 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 ~GK after which we find rates varying by less than a factor of two independent of resonance energy. The capture mechanism is sequential through the proton-core resonance, but the continuum background contributes significantly.
Cite
@article{arxiv.1709.01270,
title = {Two-proton capture on the $^{68}$Se nucleus with a new self-consistent cluster model},
author = {D. Hove and E. Garrido and A. S. Jensen and P. Sarriguren and H. O. U. Fynbo and D. V. Fedorov and N. T. Zinner},
journal= {arXiv preprint arXiv:1709.01270},
year = {2018}
}
Comments
7 pages, 4 figures