Weak interaction rates for Kr and Sr waiting-point nuclei under rp-process conditions

Abstract

Weak interaction rates are studied in neutron deficient Kr and Sr waiting-point isotopes in ranges of densities and temperatures relevant for the rp-process. The nuclear structure is described within a microscopic model (deformed QRPA) that reproduces not only the half-lives but also the Gamow-Teller strength distributions recently measured. The various sensitivities of the decay rates to both density and temperature are discussed. Continuum electron capture is shown to contribute significantly to the weak rates at rp-process conditions.

7 pages, 6 figures

References in corpus (7)

• Nuclear weak-interaction processes in stars
• Models for Type I X-Ray Bursts with Improved Nuclear Physics
• Deformation of the N=Z nucleus 76Sr using beta-decay studies
• Spin-isospin excitations and beta+/EC half-lives of medium-mass deformed nuclei
• Estimates of Stellar Weak Interaction Rates for Nuclei in the Mass Range A=65-80
• Shape mixing and beta-decay properties of neutron-deficient Kr and Sr isotopes
• Half-lives of rp-process waiting point nuclei

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• Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations
• Stellar weak decay rates in neutron-deficient medium-mass nuclei
• Effects of deformation on the beta-decay patterns of light even-even and odd-mass Hg and Pt isotopes
• Microscopic calculations of weak decays in superheavy nuclei
• $\beta$-decay half-lives and nuclear structure of exotic proton-rich waiting point nuclei under $rp$-process conditions
• Contribution of excited states to stellar weak-interaction rates in odd-A nuclei
• Beta-decay properties of neutron-rich Ca, Ti, and Cr isotopes
• Beta-decay properties of neutron-rich rare-earth isotopes
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• Self-consistent calculations of electron-capture decays in Z=118, 119, and 120 superheavy isotopes
• Electron-capture decay in isotopic transfermium chains from self-consistent calculations
• Nuclear structure and weak rates of heavy waiting point nuclei under rp-process conditions
• Elastic Electron Scattering from Deformed and Oriented Odd-A Nuclei
• Quadrupole deformation signatures in elastic electron scattering from oriented odd-A nuclei
• Ab initio study of $\beta$-decay and pairing in $N=Z$ nuclei