Stellar weak decay rates in neutron-deficient medium-mass nuclei

Journal Article · Tue Feb 15 04:00:00 EST 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.025801· OSTI ID:21499447

Sarriguren, P ^[1]

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1. 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, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 83; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
BARYONS
BCS THEORY
BETA DECAY
CALCULATION METHODS
CAPTURE
DECAY
DENSITY
DISTRIBUTION
ELECTRON CAPTURE
ELEMENTARY PARTICLES
ENERGY LEVELS
EXCITED STATES
FERMIONS
GAMOW-TELLER RULES
HADRONS
HALF-LIFE
HARTREE-FOCK METHOD
INTERMEDIATE MASS NUCLEI
ISOTOPES
MASS
NEUTRON-DEFICIENT ISOTOPES
NEUTRONS
NUCLEAR DECAY
NUCLEAR STRUCTURE
NUCLEI
NUCLEON-NUCLEON POTENTIAL
NUCLEONS
PHYSICAL PROPERTIES
POTENTIALS
PROTONS
RADIOISOTOPES
RANDOM PHASE APPROXIMATION
SENSITIVITY
SKYRME POTENTIAL