Stellar weak decay rates in neutron-deficient medium-mass nuclei
- Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Cientificas, Serrano 123, E-28006 Madrid (Spain)
Weak decay rates under stellar density and temperature conditions holding at the rapid proton-capture process are studied in neutron-deficient medium-mass waiting-point nuclei extending from Ni up to Sn. Neighboring isotopes to these waiting-point nuclei are also included in the analysis. The nuclear structure part of the problem is described within a deformed Skyrme Hartree-Fock+BCS+quasiparticle random-phase-approximation approach, which reproduces not only the {beta}-decay half-lives but also the available Gamow-Teller strength distributions, measured under terrestrial conditions. The various sensitivities of the decay rates to both density and temperature are discussed. In particular, we study the impact of contributions coming from thermally populated excited states in the parent nucleus and the competition between {beta} decays and continuum electron captures.
- OSTI ID:
- 21499447
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevC.83.025801; (c) 2011 American Institute of Physics; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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BCS THEORY
BETA DECAY
DENSITY
DISTRIBUTION
ELECTRON CAPTURE
EXCITED STATES
GAMOW-TELLER RULES
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INTERMEDIATE MASS NUCLEI
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NEUTRON-DEFICIENT ISOTOPES
NEUTRONS
NUCLEAR STRUCTURE
PROTONS
RANDOM PHASE APPROXIMATION
SENSITIVITY
SKYRME POTENTIAL
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BARYONS
CALCULATION METHODS
CAPTURE
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ENERGY LEVELS
FERMIONS
HADRONS
NUCLEAR DECAY
NUCLEI
NUCLEON-NUCLEON POTENTIAL
NUCLEONS
PHYSICAL PROPERTIES
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