Shell-model calculations of stellar weak interaction rates: II. Weak rates for nuclei in the mass range in supernovae environments

By K. Langanke, G. Mart'inez-Pinedo. 2000

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Abstract Based on large-scale shell-model calculations we have determined the electron capture, positron capture and beta-decay rates for more than 100 nuclei in the mass range A=45 –65. The rates are given for densities ρY e =10 7 – 10 10 mol / cm 3 and temperatures T=10 9 – 10 10 K and hence are relevant for both types of supernovae (Type Ia and Type II). The shell-model electron capture rates are significantly smaller than currently assumed. For proton-to-baryon ratios Y e =0.42 –0.46 mol / g, the beta-decay rates are faster than the electron capture rates during the core collapse of a massive star.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d5f2c2de1c68517a51059744b2b5675cf240ba0a

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Citations in the corpus

Presupernova Evolution with Improved Rates for Weak Interactions (2000, methodology): “In particular we have studied the effects of a new, improved set of weak interaction rates and neutrino losses by Langanke & Martínez-Pinedo (2000) and the role played by beta-decay as well as electron capture.”
Explosion mechanism, neutrino burst and gravitational wave in core-collapse supernovae (2005, methodology): “This has been practicable recently by the new-shell model calculation by Langanke and Mart́inez-Pinedo ([189, 190], see [193] for review).”
Nucleosynthesis of Zinc and Iron Peak Elements in Population III Type II Supernovae: Comparison with Abundances of Very Metal Poor Halo Stars (2001, methodology): “The use of the recent rates by Langanke & Mart́inez-Pinedo (2000), which are lower than those of Fuller et al. (1980, 1982) would lead to larger Ye (Heger et al. 2000).”
Constraints from Gravitational-wave Detections of Binary Black Hole Mergers on the 12C(α, γ)16O Rate (2020, background): “Weak reaction rates are based on the following tabulations: Langanke & Martínez-Pinedo (2000), Oda et al. (1994), and Fuller et al. (1985).”
Radioactive decays at limits of nuclear stability (2011, methodology): “The excitation energy of the Gamow-Teller Giant Resonance, that carries the main part of the Gamow-Teller strength, is known to decrease linearly with respect to the Isobaric Analogue State as a function of (N−Z)/A (Langanke and Martínez-Pinedo, 2000; Osterfeld, 1992).”
Double-detonation sub-Chandrasekhar supernovae: can minimum helium shell masses detonate the core? (2010, methodology): “The reaction rate libraries adopted in this work are the same as in those references, however, newer tables for weak reaction rates (Langanke & Martinez-Pinedo 2000) were used as described in Travaglio et al. (2004).”