Suppression of the stellar enhancement factor and the reactionRb<mml:mprescripts/><mml:none/>85(p,n)Sr<mml:mprescripts/><mml:none/>85

2009/08/21 by T. Rauscher, G. Kiss, G. G. Kiss +5 · 1 citation
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Advanced NMR Techniques and Applications #Nuclear physics research studies #astro-ph.SR #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.80.035801

published as Phys.Rev.C80:035801, 2009 · 8 figures, accepted for publication in Physical Review C

arxiv created 2009/08/21 · openalex publication_date 2009/09/03 · arxiv updated 2010/04/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

It is shown that a Coulomb suppression of the stellar enhancement factor occurs in many endothermic reactions at and far from stability. Contrary to common assumptions, reaction measurements for astrophysics with minimal impact of stellar enhancement should be preferably performed for those reactions instead of their reverses, despite of their negative Q value. As a demonstration, the cross section of the astrophysically relevant ⁸⁵Rb(p,n)⁸⁵Sr reaction has been measured by activation between 2.16\ensuremath\leqslantE_c.m.\ensuremath\leqslant3.96 MeV and the astrophysical reaction rates at p process temperatures for (p,n) as well as (n,p) are directly inferred from the data. Additionally, our results confirm a previously derived modification of a global optical proton potential. The presented arguments are also relevant for other \ensuremathα- and proton-induced reactions in the p, rp, and \ensuremathνp processes.

Citations

• Ge<mml:mprescripts/><mml:none/>70(p,γ)As<mml:mprescripts/><mml:none/>71andGe<mml:mprescripts/><mml:none/>76(p,n)As<mml:mprescripts/><mml:none/>76cross sections for the astrophysicalpprocess: Sensitivity of the optical proton potential at low energies
• Branchings in the γ process path revisited
• Photo-induced nucleosynthesis: Current problems and experimental approaches
• Coulomb Suppression of the Stellar Enhancement Factor
• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• rp-process nucleosynthesis at extreme temperature and density conditions

Cited by

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